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GOST 10702-78

GOST 10702−78 hire from quality structural carbon and alloyed steel for cold extruding and upsetting. Specifications (with Amendments No. 1, 2)

GOST 10702−78
Group В32

INTERSTATE STANDARD

RENTAL OF HIGH-QUALITY STRUCTURAL CARBON AND ALLOYED STEEL FOR COLD EXTRUDING AND UPSETTING

Specifications

Steel bars, carbon and alloy, structural, for cold extruding and upsetting. Specifications

OKP 09 5000; 4100 11; 11 5000

Date of introduction 1980−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 03.08.78 N 2101

3. REPLACE GOST 10702−63

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

   
The designation of the reference document referenced
Item number
GOST 8.326−89
5.2
GOST 162−90
5.2
GOST 166−89
5.2
GOST 427−75
5.2
GOST 1050−88
3.2
GOST 1051−73
2.4, 3.8, 3.9, 6.1
GOST 1497−84
5.8
GOST 1763−68
5.9
GOST 1778−70
5.13
GOST 2216−84
5.2
GOST 2590−88
2.1, 2.4
GOST 2879−88
2.1
GOST 3749−77
5.2
GOST 4543−71
3.2, 3.3, 3.11, 3.15
GOST 5378−88
5.2
GOST 5639−82
5.10
GOST 5640−68
5.11
GOST 6507−90
5.2
GOST 7417−75
2.1, 2.4
GOST 7502−98
5.2
GOST 7564−97
5.6
GOST 7565−81
4.3
GOST 7566−94
4.1, 4.5, 6.1
GOST 8233−56
5.11
GOST 8560−78
2.1
GOST 8817−82
5.7
GOST 9012−59
5.12
GOST 10243−75
5.5
GOST 12344−88
5.1
GOST 12345−2001
5.1
GOST 12346−78
5.1
GOST 12347−77
5.1
GOST 12348−78
5.1
GOST 12349−83
5.1
GOST 12350−78
5.1
GOST 12351−81* 5.1
_______________
* On the territory of the Russian Federation GOST 12351−2003. — Note the manufacturer’s database.
GOST 12352−81
5.1
GOST 12353−78
5.1
GOST 12354−81
5.1
GOST 12355−78
5.1
GOST 12356−81
5.1
GOST 12357−84
5.1
GOST 12358−82* 5.1
______________
* On the territory of the Russian Federation GOST 12358−2002. — Note the manufacturer’s database.
GOST 12359−99
5.1
GOST 12360−82
5.1
Round bar GOST 14955−77
2.1, 3.8, 6.1
GOST 18895−97
5.1
GOST 22536.0−87
5.1
GOST 22536.1−88
5.1
GOST 22536.2−87
5.1
GOST 22536.3−88
5.1
GOST 22536.4−88
5.1
GOST 22536.5−87
5.1
GOST 22536.6−88
5.1
GOST 22536.7−88
5.1
GOST 22536.8−87
5.1
GOST 22536.9−88
5.1
GOST 22536.10−88
5.1
GOST 22536.11−87
5.1
GOST 22536.12−88
5.1
GOST 24597−81
6.1
GOST 26877−91
5.2
GOST 28473−90
5.1

5. Ogranicheni term actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

6. EDITION with Amendments No. 1, 2 approved in June 1985, November 1989 (IUS 10−85, 2−90)


This standard applies to calibrated with special surface finish rolling for the manufacture of products by cold extrusion and upsetting and hot-rolled steel (strip, wire rod) for the manufacture and calibrated with special surface finish rolling and wire.

As part of the rules of the chemical composition standard also applies to bars and billets intended for products produced by cold extrusion and upsetting.

(Changed edition, Rev. N 2).


1. CLASSIFICATION

1.1. Rentals are divided as follows:

according to the method of fabrication:

hot-rolled,

calibrated

hot-rolled and calibrated with special surface finish;

— as material:

thermally processed (vacation or conventional annealing),

thermally treated (annealing spheroidizing) — TC

without heat treatment,

full hard (calibrated and calibrated with special surface finish) — N;

— the magnitude of the deformation under the cold sediment on the group:

to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial specimen height — 50,

to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial specimen height — 66,

to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the sample under test for controlling the heat-treated samples (after a holiday, the usual annealing or annealing spheroidizing) — 66 Т;

to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)its original height during the test for control and heat-treated (after spheroidizing annealing) and grinded samples 66И,

to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial specimen height — 75,

to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)its original height during the test for control and heat-treated (after spheroidizing annealing) and grinded samples 75И;

— the quality of the surface (hot rolled steel) — groups 1 and 2.

(Changed edition, Rev. N 1, 2).

2. ASSORTMENT

2.1. Shape, dimensions and limit deviations of the dimensions of the rental and other requirements to the assortment should meet the standard assortment listed in table.1.

Table 1

         
Product The designation of the standard
Size, mm Accuracy class Kvalitet
Hot-rolled mill:
       
— round GOST 2590*
From 5 to 45 A, B, C -
— hex
GOST 2879** From 8 to 48 B  
Rolled calibrated:
       
— round GOST 7417 From 3 to 42 - h10, h11, h12
— hex
GOST 8560 From 7 to 40   h10, h11
Profile cold drawn shestigrannyj
GOST 8560 From 3.0 to 6.5   h10, h11
Rolled with special surface finish GOST 14955 From 5 to 30
  h10, h11, h12
    SV. 30 to 50   h11, h12

_______________
* On the territory of the Russian Federation GOST 2590−2006, here and hereafter;
** On the territory of the Russian Federation GOST 2879−2006. — Note the manufacturer’s database.

Note. In the absence of specifying a user class accuracy or quality chosen by the manufacturer.


(Changed edition, Rev. N 2).

2.2. Hire made:

— hot round and hex:

size from 5 to 7 mm — in rolls,

the size of St. 7 to 42 mm — in coils and rods,

size SV 42 mm — in bars;

— drawn round and hex:

less than 5 mm — in rolls,

size St. 5 to 40 mm — in coils and bars;

— cold-drawn hexagonal profile with the size less than 7 mm — in rolls;

— special surface finish of all the amounts specified in the table.1 — in coils and bars.

Note. Coil’s weight should be 0,03−2,1 t


(Changed edition, Rev. N 1, 2).

2.3. The ends of hot-rolled bars need to be trimmed. For bars, cut into presses and shears, permitted crumpled ends. At the request of the consumer burrs on the ends of bars must be stripped.

Hot-rolled steel in coils are made without trimming the ends. At the request of the consumer the ends of skeins, designed for the landing of goods on semi-automatic and automatic equipment must be circumcised.

2.4. The ends of the calibrated rods and coils with special surface finish should be circumcised without bend and burrs. When cutting with shears allowed crushing the stub end while maintaining the size of the second dragged the end. In coordination with the consumer bars are made with a limited length of the crushed end. Dragged at the end of the allowed bands.

At the request of the consumer rental with a diameter of over 12 mm are made with chamfer on one end.

Examples of symbols


Hot-rolled steel with a diameter of 15 mm rods, high accuracy rolling B churchyard 2590, grade 30, group of quality surface 1, groups 50 precipitation without heat treatment:

ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)

A calibrated Bicycle with a diameter of 25 mm in coils of tolerance h11 GOST 7417, 10kp steel grade, surface quality B according to GOST 1051, groups, precipitation 66, full hard — N:

ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)

Rolled with special surface finish diameter of 6.60 mm, the rods kvalitet h12, group of quality surface D according to GOST 14955, thermally treated (annealing spheroidizing):

ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)

2.3, 2.4. (Changed edition, Rev. N 2).

3. MARKS AND TECHNICAL REQUIREMENTS

3.1. Rental must be manufactured in accordance with the requirements of this standard according to the technological instructions approved in the prescribed manner.

(Changed edition, Rev. N 1, 2).

3.1a. Rental produce the following grades: 08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25, 30, 35, 40, 45, 50, 15X, 20X, 30S, 35X, 38KHA, 40H, 45KH, 15G, 20G, 40G, 45G, 20G2, 35G2, 40G2, 38KHS, 12KHN, 40KHN, 50KHN, 15KHF, 15KHM, 16KHSN, 19KHGN, 30KHMA, 12ХНЗА, 20KHGSA, 30KHGSA, 35HGSA, 15KHGNM, 38KHGNM, 18KH2N4MA, 25KH2N4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 30KHN2MFA.

(Changed edition, Rev. N 2).

3.2. The chemical composition must comply with:

— carbon steel grades 08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25, 30, 35, 40, 45, 50 — the requirements of GOST 1050, except for the mass fraction of silicon, which is set not more than 0.03% for steel grade 10kp, not more than 0.10% semi-killed steel grades and 0.20% for steel grades 25, 30, 35, 40 and 45. Mass fraction of manganese in steel grades 25, 30, 35, 40 and 45 should be no more than 0.60 percent;

alloy steel grades of 15X, 20X, 30S, 35X, 38KHA, 40H, 45KH, 15G, 20G, 35G2, 40G2, 40G, 45G, 38KHS, 40KHN, 50KHN, 15KHF, 15KHM, 30KHMA, 12KHN3A, 20KHGSA, 30KHGSA, 35HGSA, 18KH2N4MA, 25X2H4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 30KHN2MFA — the requirements of GOST 4543. Mass fraction of silicon in steel grades 15X, 20X, 30S, 35X, 40X, 45KH, 40KHN, 15KHF, 30KHMA should be not more than 0.20%; mass fraction of manganese in steel grades 15X, 20X and 30X — not more than 0,60%.

3.3. The chemical composition of steel grades 20G2, 12KHN, 16KHSN, 19KHGN, 15KHGNM, 38KHGNM must comply with the specified in table.2. Permissible deviations in chemical composition in ready-to-hire — according to GOST 4543.

Table 2

                   
Steel grade Mass fraction of elements, %
  Carbon Silicon Manganese Sulfur Phosphorus
Chrome Nickel Molybdenum Copper,
no more
        no more
       
20G2 0,18−0,26
0,17−0,37 1,30−1,60 0,035 0,035 Not more than 0.25
Not more than 0.25 - 0,20
12KHN 0,09−0,15
  0,30−0,60     0,40−0,70
0,50−0,80   0,30
16KHSN 0,13−0,20
0,60−0,90       0,80−1,10
0,60−0,90   0,20
19KHGN 0,16−0,21
0,17−0,37 0,70−1,00       0,80−1,10 Not more than 0.10
0,30
15KHGNM 0,13−0,18
  0,70−1,10     0,40−0,70
0,40−0,70 0,15 — 0,25  
38KHGNM 0,37−0,43
  0,50−0,80     0,40−0,60
     



(Changed edition, Rev. N 1, 2).

3.4. Hot-rolled and hot-rolled with special surface finish rolled to produce heat-treated (annealed, tempered, after spheroidizing annealing) or without heat treatment, and the calibrated and calibrated with special surface finish rolling cold-worked, annealed condition or after annealing spheroidizing.

A heat treatment process should be installed in order. Allowed instead of specified in the order of hot-rolled steel fabricating heat-treated in agreement with the consumer.

3.5. Mechanical properties and hardness of the rolled in the heat-treated condition shall be as specified in table.3 without heat treatment and cold-worked or cold-worked condition with an intermediate heat treatment is given in table.4.

Table 3

           
Steel grade Hardness HB, no more

Tensile strength ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2), N/mmГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)(kgf/mmГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2))

The relative narrowing ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2), %, not less

  after a holiday or a conventional annealing
after spheroidize — roumega annealing  
  Hot-rolled steel
rolled steel with special surface finish
Steel calibrated and calibrated with special surface finish
08KP, 08ps 115 131 310−410 (32−42) 290−390 (30−40) 60
08         55
10kp, 10ps
  143     50
10     330−450 (34−46) 310−410 (32−42) 55
15kp, 15ps
125 149 360−470 (37−48) 320−420 (33−43)  
15          
20kp, 20ps
20
132 163 390−490 (40−50) 340−440 (35−45) 50
25 156 170 Not more than 540 (55)
No more 490 (50)  
30   179
Not more than 570 (58)
Not more than 520 (53) 45
35 163 187 Not more than 590 (60)
Not more than 540 (55)  
40   197   + 40
45 170
207      
50 217 217 +   +
15X 156 179 No more than 550 (56)
340−440 (35−45) 60
20X
163     360−470 (37−48)  
30S 170 187 + + +
35X          
40X 179 207      
45KH   229      
38KHA 187 207 Not more than 590 (60)
Not more than 560 (57) 60
15G 163 163
+ + +
20G 179 187      
20G2 187 197      
35G2   207      
40G
207        
45G 229 229      
40G2 217 255      
38KHS
255        
12KHN + + 410−530 (42−54)
410−510 (42−52) 70
40KHN 179 207
+ + +
50KHN 197 217      
15KHF 163 187 Not more than 540 (55)
No more 490 (50) 55
19KHGN + 217 +
Not more than 690 (70)
+
15KHM 179
179   +  
16KHSN
197 + Not more than 640 (65)
Not more than 540 (55) 55
30KHMA 217 229 + + +
20KHGSA 197 207      
30KHGSA
217 229 Not more than 690 (70)
  Fifty seven
35HGSA
241 241 +   +
15KHGNM
+ 217   No more 490 (50)
60
38KHGNM
  +   Not more than 690 (70)
 
12ХНЗА
217 217   + +
18KH2N4MA
269 269      
25KH2N4MA 255        
(25KH2N4VA)
269     Not more than 640 (65) 50
40KHN2MA
(40HNMA)
         
30KHN2MFA
      + +


Notes:

1. The sign «+" means that the mechanical properties and the hardness is determined for the data formation and the test results indicate in the document about quality.

2. The hardness of calibrated round steel and cold drawn hexagonal sizes less than 5 mm determined by agreement between manufacturer and consumer.

Table 4

           
Steel grade Hardness, HB,
no more

Tensile strength ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2), N/mmГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)(kgf/mmГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2))

Elongation ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2), %

The relative narrowing ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2), %

  Hot-rolled steel and hot rolled with special surface finish not less than
    Steel nagarebana calibrated and calibrated with special surface finish
08KP, 08ps
131
179 370 (38)
8 60
08
        55
10kp, 10ps
137        
10
  187 390 (40)   50
15kp, 15ps
143        
15   197 440 (45)
  45
20kp, 20ps
156   490 (50) 7  
20   207
    40
25 170 217 540 (55)
   
30 179
229 560 (57)    
35 187
  590 (60) 5  
40 217 241 + + +
45 229        
12KHN - 210      
19KHGN
  269      
15X, 20X   207 590 (60)
5 45
30S     + + +
35X, 40X   + 690 (70)
5 40
38KHA
  207 + + +
15KHF, 40KHN
         
20G2
  + 490−690 (50−70)
   
30KHGSA     490−740 (50−75)
   
16KHSN
    440−640 (45−65)
   
30KHMA
         
15KHGNM     +    


Notes:

1. The sign «+" means that the mechanical properties and the hardness is determined for the data formation and the test results indicate in the document about quality.

2. The hardness of calibrated round steel and cold drawn hexagonal sizes less than 5 mm determined by agreement between manufacturer and consumer.

3.4, 3.5. (Changed edition, Rev. N 1, 2).

3.6. The hot rolled size up to 30 mm, grooved, hot-rolled and calibrated with special surface finish size up to 28 mm should stand the test on a cold draught in accordance with table.5. In upset samples should be free of tears and cracks.

Table 5

         
Group precipitation
The amount of deformation at cold lees
A method of manufacturing Delivery condition Mark
50

To ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the sample

HR Without heat treatment 08ps, 08KP, 08, 10ps, 10kp, 10, 15, 15kp, 15ps, 20, 20kp, 20ps, 25, 30, 35, 40, 45, 50, 15X, 20X, 30S, 35X, 40X, 40KHN, 38KHA, 15G, 20G, 15KHF
    Calibrated Full hard 08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 15X, 20kp, 20ps, 20, 25, 30, 35, 12KHN
    Hot-rolled grooved
Heat treated 10kp, 25, 30, 35, 40, 45, 50, 15X, 20X, 20kp, 25X, 30X, 35X, 40X, 45KH, 38KHA, 15G, 20G, 20G2, 40G, 45G, 35G2, 40G2, 38KHS, 12KHN, 40KHN, 50KHN, 15KHF, 16KHSN, 19KHGN, 15KHGNM, 30KHMA, 15KHM, 20KHGSA, 30KHGSA, 35HGSA, 12KHN3A, 18KH2N4MA, 25KH2N4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 38KHGNM, 30KHN2MFA
66

To ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the sample

Hot-rolled and hot-rolled with special surface finish
Without heat treatment 08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 15G
    Calibrated
Full hard 08KP, 10, 10kp, 15, 15X, 15kp, 20, 20kp, 25
    Calibrated hot-rolled, hot-rolled and calibrated with special surface finish
Heat treated According to claim 3.1 and
66Т

To ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the sample heat treated with a hardness in accordance with table.3

HR Without heat treatment 20, 25, 30, 35, 40, 45, 50, 15X, 20X, 30X, 35X, 38XA, 40X, 45X, 20G, 40G, 45G, 20G2, 35G2, 40G2, 38KHS, 12KHN, 40KHN, 50KHN, 15KHF, 15KHM, 16KHSN, 19KHGN, 30KHMA, 12ХНЗА, 20KHGSA, 30KHGSA, 35HGSA, 15KHGNM, 38KHGNM, 18KH2N4MA, 25KH2N4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 30KHN2MFA
66И

To ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the thermally treated and grinded sample

    According to claim 3.1 and
75

To ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the sample

Hot-rolled with special surface finish and calibrated with special surface finish
Heat treated -
75И

To ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)the initial height of the thermally treated and grinded sample

HR
Without thermal treatment and thermally treated  


Notes:

1. Rental group precipitation 75 and 75И are made by agreement between manufacturer and consumer.

2. In the subsequent surface finishing of the consumer testing for deformation in cold sediment should be conducted to control heat-treated and machined samples. In this case, when the ordering of hot-rolled steel, you must specify designation 66И and 75И.

3. It is possible to supply hot-rolled steel without heat treatment in the group of precipitation is 75.


Tests on sediment cold rolled with a size of over 30 mm is not acceptance before 01.01.92. The test is compulsory.

3.7. The surface of hot-rolled steel should be smooth without cracks, prisoner, foreign inclusions, smoothed out bubbles, dirt and sunsets.

Permissible surface defects of steel are shown in table.6.

Table 6

         
      The defects allowed
Group
over-
ness
The name of the rental Group precipitation Name The maximum depth of
1 For the manufacture of calibrated rolled (without special surface finishes) 50, 66 and 66Т Prints, Rabina Half of the dimension tolerance
      Some small risks

ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)dimension tolerance, but not more than 0.1 mm for sections up to 20 mm and not more than 0.2 mm for cross sections of 20 mm and above

2 For the manufacture of hot rolled and calibrated with special surface finish rental
66И, 75 and 75И Prints, rabiza, risk, rolled out small bubbles and contamination
The tolerance on size

3.8. The surface quality of the calibrated hire in accordance with the order must meet the requirements of groups A and B, GOST 1051.

The quality of rolled product surface with special surface finish should meet the requirements of groups A, B, C, D and e according to GOST 14955.

3.9. At the request of the enterprises of MISI is made of hot-rolled steel group 1 with the presence on the surface of separate small wooloowin with a maximum depth of not more tolerance on the size of the calibrated hire kvalitet h11 and calibrated rolled in groups according to GOST 1051.

3.7−3.9. (Changed edition, Rev. N 2).

3.10. (Deleted, Rev. N 1).

3.11. The macrostructure of the carbon steel when tested for the fractures treated or templete should not have shrinkage and looseness, blistering, delamination, cracks, inclusions and placenow visible without using the magnifying devices. In the macrostructure of rimming steel not permitted exudation square opening to the surface.

The macrostructure of alloy steel must meet the requirements of GOST 4543.

3.12. The size of the austenitic grain in the steel alloy should be not larger than 5 rooms.

3.12. The size of the actual grain in the rolling of steel grades 30, 35, 40, 45, 30S, 38KHA, 40X and 12KHN should be not larger than 5 rooms. Allowed the presence of single grains of number 4, if the relative area occupied by them on the cone does not exceed 20%.

(Added, Rev. N 2).

3.13. In the microstructure of hot-rolled heat-treated and calibrated rolled steel grades 30, 35, 40, 45, 12KHN, 30S, 38KHA, 40KHN2MA, 40H, 38KHGNM should not be grouplisting perlite.

3.14. Overall depth bezoperatsionnogo layer (ferrite+transition zone) of rolled steel grades with a mass fraction of carbon of 0.3% or more at the lower limit in the marches must not be more than 1.5% per side.

Depth bezoperatsionnogo layer of the thermally processed hot-rolled and calibrated with special surface finish of the rental should be not more than 0.05 mm rolled diameter up to 10 mm, 0.1 mm — for hire with a diameter of 10 to 20 mm and 0.5% for rental with a diameter greater than 20 mm.

For hot-rolled and calibrated with special surface finish rolled, not heat treated, decarburization is not allowed.

3.15. At the request of the consumer rental made:

a) calibrated with surface coatings (phosphating etc.);

b) with narrowed limits for the mass fraction of carbon with a run not less than 0.05%;

in) with a mass fraction of sulfur, not more than 0,025, 0,030 and 0,035%, phosphorus not more than 0,025%;

g) with the value bezoperatsionnogo layer in the hot rolled and calibrated with special surface finish (with a mass fraction of carbon of 0.3% and higher) is not more than 1.0% on the side;

d) determining the amount of the actual grain in the steel grades that are not listed in paragraph 3.12 a;

e) control of microstructure of the steel grades that are not listed in paragraph 3.13;

f) with a normalized purity steel non-metallic inclusions;

z) with a normalized purity alloy steel for foloowing in accordance with GOST 4543;

s) with control of mechanical properties on thermally treated samples;

K) control of the macrostructure of the fracture or etching, the five templates selected from different bars and coils;

l) with a normalized value of the segregated square in the macrostructure of boiling steel;

m) with grain size in the ferrite in the range of 5−7 rooms;

n) gauged, hot-rolled and calibrated with special surface finish rolling of steel grades with a mass fraction of carbon of 0.3% or more at the lower limit of the Marche with a normalized quantity of granular pearlite in the microstructure of the rental;

o) with a normalized distance value of the actual grain;

p) calibrated full hard rolled steel grades of 30 and 35 on group precipitation of 66.

Note. Standards in subparagraphs a, d, e, f, I, l and methods to control the microstructure and purity of steel by foloowing determined by agreement between manufacturer and consumer.

3.13−3.15. (Changed edition, Rev. N 2).

4. ACCEPTANCE RULES

4.1. Rods and reels take parties. The party must consist of bars and coils of steel in one melting, one size and one mode of heat treatment.

The party should be issued a single document on quality in accordance with GOST 7566.

(Changed edition, Rev. N 1, 2).

4.2. Dimensions and surface quality check on all the bars or coils.

4.3. To check the chemical composition of the selected sample according to GOST 7565.

4.4. To check the quality of hire from a selected batch:

— to control the hardness, macrostructure by fracture or etching, microstructure, determining the depth bezoperatsionnogo layer and tests on sediment — three bar or coil;

— for the determination of nonmetallic inclusions — two bar or coil;

— to control the mechanical properties of the two rod or coil.

(Changed edition, Rev. N 2).

4.5. If unsatisfactory test results of at least one of the indicators, repeat tests carried out in accordance with the requirements of GOST 7566.

5. TEST METHODS

5.1. Chemical composition is determined by GOST 12344*-12360 GOST, GOST 18895, GOST 22536.0 to GOST 22536.12, GOST 28473 or other methods providing the required accuracy.
_______________
* On the territory of the Russian Federation GOST 12344−2003. — Note the manufacturer’s database.


(Changed edition, Rev. N 1, 2).

5.2. The geometric dimensions and shape determined by means of measuring instruments according to the GOST 162, 166 GOST, GOST 427, GOST 3749, 5378 GOST, GOST 6507, GOST 7502, GOST 26877 or templates according to normative-technical documentation (NTD), and tools or templates, certified according to GOST 8.326* or GOST 2216.
________________
* On the territory of the Russian Federation PR 50.2.009−94**.
** In the territory of the Russian Federation to apply the Procedure of testing standard specimens or measurement facilities for the purposes of type approval, the Procedure for approval of type of standard samples or type of measuring instruments, the Procedure for issuing certificates on approval of type of standard samples or type of measuring instruments, establishment and changing of the validity period of these certificates and the interval between verifications of measuring instruments, Requirements to the signs of type approval for standard samples or type of measuring instruments and their application, approved by order of Minpromtorg of Russia of 30 November 2009 # 1081. — Note the manufacturer’s database.

(Changed edition, Rev. N 2).

5.3. The surface quality is checked visually in the stream or upon acceptance. If necessary, a bleaching or etching of the surface. Allowed to control the quality of the surface of the magnetic and other non-destructive methods.

5.4. To control hardness, mechanical properties, micro — and macrostructure, testing sediment and determine the depth bezoperatsionnogo layer from each test bar or coil are taken one by one test specimen of each type.

Sampling from the rod is carried out at a distance of not less than 150 mm from the bar end from the roll at a distance of not less than 1.5 m at a coil weight up to 250 kg and not less than 3,0 m at a mass skein over 250 kg.

(Changed edition, Rev. N 1).

5.5. Control of macrostructure of steel by etching or by type of fracture churchyard 10243 conduct or method of ultrasonic inspection according to the method of the manufacturer.

The manufacturer is allowed to check the macrostructure in the intermediate billet melting-ladle and the results of monitoring be extended to all of her laminated profiles and calibrated and calibrated with special surface finish rolling.

(Changed edition, Rev. N 2).

5.6. Sampling for mechanical test on a cold draught — GOST 7564.

5.7. The test sediment in a cold condition of hot-rolled steel up to 30 mm, grooved, hot-rolled and calibrated with special surface finish size up to 28 mm is carried out according to GOST 8817. Rental of steel grades 10, 15, 20, 20kp, and 25 group 66 cold-worked condition, fail the test sediment to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2)subject to a repeated test to ГОСТ 10702-78 Прокат из качественной конструкционной углеродистой и легированной стали для холодного выдавливания и высадки. Технические условия (с Изменениями N 1, 2).

Rent with size over 30 mm feel the upsetting according to the method approved in the prescribed manner.

5.8. Control of mechanical properties is carried out according to GOST 1497 on samples of five times the round length with a diameter of 10 mm. is allowed to conduct tests on full-scale samples.

5.7, 5.8. (Changed edition, Rev. N 2).

5.9. Depth bezoperatsionnogo layer was determined by M according to GOST 1763.

5.10. The grain size is determined according to GOST 5639.

5.11. Assessment grouplisting perlite is carried out according to GOST 8233.

Evaluation of granular perlite is carried out according to agreed standards.

(Changed edition, Rev. N 2).

5.12. The hardness is determined according to GOST 9012.

5.13. Non-metallic inclusions is determined according to GOST 1778.

5.14. Allowed to apply non-destructive and statistical control methods according to the methods agreed in the prescribed manner.

6. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

6.1. Packing, marking, transportation and storage rolled produced as per GOST 7566 with the following additions: marking, packaging, transportation and storage of the calibrated hire must meet the requirements of GOST 1051, rolled with special surface finish GOST 14955.

Label, calibrated, and calibrated with special surface finish applied to hire additional letters «XB» (cold heading).

The outer diameter of a coil of hot-rolled steel should be not more than 1500 mm, the inner is not less than 180 mm.

Transportation can be done at indoor and outdoor vehicles of all types in accordance with the rules of cargo transportation applicable to the transportation of the species.

Weight of cargo must not exceed when mechanized loading into open vehicles is 10 tons, covered — 1,25 t.

When transporting in a single address two or more parcels, the dimensions of which allow it to form a transport package with dimensions according to GOST 24597, the package needs to be formed into transport packets according to NTD.

The uld (linkage stack) — according to GOST 7566.

(Changed edition, Rev. N 1, 2).



The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
High quality steel: Sat. Standards. -
M.: IPK Publishing house of standards, 2002