GOST 26492-85
GOST 26492−85 the rolled Bars from titanium and titanium alloys. Specifications (with Amendments No. 1, 2)
GOST 26492−85
Group W55
STATE STANDARD OF THE USSR
THE ROLLED BARS FROM TITANIUM AND TITANIUM ALLOYS
Specifications
Titanium and titanium alloys rolled bars.
Specifications
GST 18 2561
Date of introduction 1987−01−01
Resolution of the USSR State Committee on standards of 26 March 1985, 829 N period of validity set with
_______________
* Expiration removed by the resolution of Gosstandart of the USSR from
MADE: the Change in N 1, approved and put into effect by the Decree of the USSR State Committee for standards from
Change N 1, 2 made by the manufacturer of the database in the text IUS No. 12, 1989, ICS # 12, 1991
This standard applies to neobhodimye round hot rolled bars from titanium and titanium alloys.
1. CLASSIFICATION
The bars are subdivided:
quality:
normal quality (indicate brand name of titanium or titanium alloy);
high quality PC;
for precision manufacturing:
normal accuracy;
high accuracy — P.
Section 1. (Changed edition, Rev. N 1).
2. ASSORTMENT
2.1. The dimensions of bars and limit deviations thereon shall be as specified in table.1.
Table 1
| Nominal diameter, mm | Limit deviations of the diameter of the rod, mm |
The cross-sectional area, cm |
Theoretical mass 1 m rod, kg | |||
| normal accuracy |
increased accuracy | normal accuracy | increased accuracy | normal accuracy | increased accuracy | |
| 10 |
+0,4 -0,6 |
- | 0,770 | - | 0,346 | - |
| 12 |
-0,6 | 1,112 | 1,075 | 0,500 | 0,484 | |
| 14 |
+0,6 -0,8 |
-0,8 | 1,518 | 1,453 | 0,683 | 0,653 |
| 16 |
-0,8 | 1,986 | 1,911 | 0,894 | 0,860 | |
| 18 |
- | 2,517 | - | 1,132 | - | |
| 20 |
+1,0 -1,5 |
+0,6 A 1.0 |
3,064 | 3,079 | 1,379 | 1,386 |
| 22 |
3,715 | 3,733 | 1,672 | 1,680 | ||
| 25 |
4,811 | 4,831 | Two thousand one hundred sixty five | 2,174 | ||
| 28 |
6,048 | 6,070 | 2,722 | 2,731 | ||
| 30 |
6,951 | 6,975 | 3,128 | 3,139 | ||
| 32 |
7,917 | 7,942 | 3,563 | 3,574 | ||
| 35 |
9,484 | 9,512 | 4,268 | 4,280 | ||
| 38 |
11,192 | 11,222 | 5,037 | 5,050 | ||
| 40 |
12,410 | 12,441 | 5,584 | 5,599 | ||
| 42 |
13,690 | 13,723 | 6,161 | 6,175 | ||
| 45 |
15,728 | 15,763 | 7,078 | 7,094 | ||
| 48 |
17,908 |
17,945 |
8,058 |
8,075 | ||
| 50 |
+1,0 To 2.0 |
+0,6 -1,4 |
19,244 | 19,322 | 8,660 | 8,695 |
| 52 |
20,830 | 20,912 | 9,374 | 9,410 | ||
| 55 |
23,328 | 23,414 | 10,498 | 10,536 | ||
| 60 |
27,805 | 27,899 | 12,512 | 12,554 | ||
| 65 |
+1,5 -2,5 |
+1,0 -1,5 |
32,675 | 32,928 | 14,704 | 14,818 |
| 70 |
37,937 | 38,210 | 17,072 | 17,195 | ||
| 75 |
43,592 | 43,885 | 19,616 | 19,748 | ||
| 80 |
49,639 | 49,952 | 22,338 | 22,478 | ||
| 85 |
±2,0 | ±1,5 | 56,745 | 56,745 | 25,535 | 25,535 |
| 90 |
63,617 | 63,617 | 28,628 | 28,628 | ||
| 100 |
78,540 | 78,540 | 35,343 | 35,343 | ||
| 110 |
±3,0 | - | 95,033 | - | 42,765 | - |
| 120 |
- | 113,098 | - | 50,894 | - | |
| 130 |
- | 132,733 | - | 59,730 | - | |
| 140 |
- | 153,938 | - | 69,272 | - | |
| 150 |
- | 176,715 | - | 79,522 | - | |
Notes:
1. Theoretical weight of 1 m of the rod calculated by the average diameter at a density of 4.5 g/cm, which corresponds to the density of titanium.
2. Conversion factors to calculate the approximate theoretical weight of 1 m of the rod of titanium alloys is given in reference Appendix 1.
3. Bars with a diameter from 65 to 150 mm inclusive of titanium alloy VT1−2 produced only normal accuracy.
(Changed edition, Rev. N 1).
2.2. The length of bars made:
random length:
from 0.5 to 4 m at the diameter of bars from 10 to 20 mm, inclusive,
from 0.5 to 6 m — diameter bars in St. 20 to 60 mm inclusive,
from 0.5 to 2 m in diameter over 60 bars up to 150 mm;
gauging and multiple of gauging length within off-gage limits deviations:
+30 mm for rods ø 10 to 20 mm, inclusive,
+50 mm for bars with diameter over 20 to 60 mm inclusive,
+70 mm, for bars with diameter over 60 mm to 150 mm.
(Changed edition, Rev. N 2).
2.3. Bars multiple lengths must be manufactured taking into account allowance for each cut is 10 mm.
2.4. In the manufacture of rods of standard length with a diameter of from 20 to 60 mm is allowed in the party 10% of bars with a length of at least 500 mm, and in the manufacture of rods of standard length with a diameter of over 60 mm — 15% of bars in length not less than 300 mm.
2.5. Oval bars should not display their dimensions for limit deviation for diameter.
2.6. Bars must be straight. Permissible curvature of the rod of 1 m length should not exceed 5 mm for rods ø 10 to 60 mm, inclusive, 7 mm, for bars with diameter over 60 to 150 mm, inclusive.
The overall curvature of the rod should not exceed the permissible curvature 1 m length of rod to the length of the rod in meters.
2.7. If no ordering instructions on manufacturing precision and surface quality, bars are made of normal accuracy and normal quality.
Examples of symbols
The rod of titanium alloy OT4 brand with a diameter of 65 mm, normal quality, normal accuracy, random length:
Rod OT4 65 GOST 26492−85
The same high accuracy length of 1500 mm:
The same length is a multiple of (KD) of 1000 mm:
The rod of titanium alloy OT4 brand diameter 65 mm high quality normal accuracy 2000 mm long:
The same high accuracy of random length:
Rod OT4 PC.65П GOST 26492−85
The same length, the fold (KD) of 1000 mm:
2.6, 2.7. (Changed edition, Rev. N 1).
3. TECHNICAL REQUIREMENTS
3.1. Bars manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
3.1.1. The rods are made of titanium grades VT1−00, VT1−0 and titanium alloys OT4−0, OT4−1, OT4, VT5, VT5−1, VT6, VTZ-1, VT9, VT14, VT20, VT22 with the chemical composition according to GOST 19807−74, titanium brand VT1−2 and titanium alloys VT6S, VT8 with the chemical composition according to normative-technical documentation.
(Changed edition, Rev. N 1).
3.2. The bars are made without heat treatment (hot rolled).
3.3. Mechanical properties of rods of ordinary quality shall conform to the requirements given in table.2.
Table 2
| Grade | The test samples |
The diameter of the rod, mm |
Temporary resistance |
Elongation |
The relative narrowing |
The impact strength KCU, j/cm |
| not less than | ||||||
| VT1−00 | Annealed | 10 to 12 incl. |
295 (30) | 20 | 50 | - |
| SV. 12 to 100 incl. |
295 (30) | 50 | 100 (10,0) | |||
| SV. 100 to 150 incl. |
265 (27) | 40 | 60 (6,0) | |||
| VT1−0 | Annealed | 10 to 12 incl. |
345 (35) | 15 | 40 | - |
| SV. 12 to 100 incl. |
40 | 70 (7,0) | ||||
| SV. 100 to 150 incl. |
36 | 50 (5,0) | ||||
| VT1−2 | Annealed |
65 to 150 incl. | 590−930 (60−95) |
8 | 17 | 25 (2,5) |
| OT4−0 | Annealed | 10 to 12 incl. |
440 (45) | 15 | 35 | - |
| SV. 12 to 100 incl. |
15 | 35 | 50 (5,0) | |||
| SV. 100 to 150 incl. |
13 | 30 | 40 (4,0) | |||
| OT4−1 | Annealed | 10 to 12 incl. |
540 (55) | 12 | 30 | - |
| SV. 12 to 100 incl. |
12 | 30 | 45 (4,5) | |||
| SV. 100 to 150 incl. |
10 | 21 | 40 (4,0) | |||
| OT4 | Annealed | 10 to 12 incl. |
685 (70) | 8 | 25 | - |
| SV. 12 to 100 incl. |
685 (70) | 25 | 40 (4,0) | |||
| SV. 100 to 150 incl. |
635 (65) | 20 | 35 (3,5) | |||
| VT5 | Annealed | 10 to 12 incl. |
735 (75) | 8 | 20 | - |
| SV. 12 to 100 incl. |
735 (75) | 8 | 20 | 30 (3,0) | ||
| SV. 100 to 150 incl. |
685 (70) | 6 | 15 | 30 (3,0) | ||
| VT5−1 | Annealed | 10 to 12 incl. |
785 (80) | 8 | 20 | - |
| SV. 12 to 100 incl. |
785 (80) | 8 | 20 | 40 (4,0) | ||
| SV. 100 to 150 incl. |
745 (76) | 6 | 15 | 40 (4,0) | ||
| VT6 | Annealed | 10 to 12 incl. |
885 (90) | 8 | 20 | - |
| SV. 12 to 100 incl. |
885 (90) | 8 | 20 | 25 (2,5) | ||
| SV. 100 to 150 incl. |
835 (85) | 6 | 15 | 25 (2,5) | ||
| Hardened and aged | 10 to 12 incl. |
1080 (110) | 4 | 12 | - | |
| SV. 12 to 100 incl. |
20 (2,0) | |||||
| VT6S | Annealed | 10 to 12 incl. |
835 (85) | 9 | 22 | - |
| SV. 12 to 100 incl. |
835 (85) | 9 | 22 | 30 (3,0) | ||
| SV. 100 to 150 incl. |
755 (77) | 6 | 15 | 25 (2,5) | ||
| Hardened and aged | 10 to 12 incl. |
1030 (105) | 4 | 14 | - | |
| SV. 12 to 100 incl. |
25 (2,5) | |||||
| VT3−1 | Annealed | 10 to 12 incl. |
930 (95) | 8 | 20 | - |
| SV. 12 to 100 incl. |
8 | 20 | 30 (3,0) | |||
| SV. 100 to 150 incl. |
6 | 15 | 25 (2,5) | |||
| VT8 | Annealed | 10 to 12 incl. |
980 (100) | 8 | 20 | - |
| SV. 12 to 100 incl. |
980 (100) | 8 | 20 | 30 (3,0) | ||
| SV. 100 to 150 incl. |
930 (95) | 6 | 15 | 20 (2,0) | ||
| VT9 | Annealed | 10 to 12 incl. |
980 (100) | 7 | 16 | - |
| SV. 12 to 100 incl. |
980 (100) | 7 | 16 | 25 (2,5) | ||
| SV. 100 to 150 incl. |
930 (95) | 6 | 15 | 20 (2,0) | ||
| VT14 | Annealed | 10 to 12 incl. |
885 (90) | 8 | 22 | - |
| SV. 12 to 100 incl. |
885 (90) | 8 | 22 | 30 (3,0) | ||
| SV. 100 to 150 incl. |
865 (88) | 6 | 15 | 30 (3,0) | ||
| Hardened and aged | 10 to 12 incl. |
1080 (110) | 4 | 8 | - | |
| SV. 12 to 100 incl. |
20 (2,0) | |||||
| VT20 | Annealed | 10 to 12 incl. |
885 (90) | 8 | 20 | - |
| SV. 12 to 100 incl. |
7 | 30 (3,0) | ||||
| SV. 100 to 150 incl. |
8 | 25 (2,5) | ||||
| VT22 | Annealed | 10 to 12 incl. |
1030 (105) | 8 | 20 | - |
| SV. 12 to 100 incl. |
8 | 16 | 25 (2,5) | |||
| SV. 100 to 150 incl. |
6 | 14 | 20 (2,0) | |||
(Changed edition, Rev. N 1).
3.4. Mechanical properties of bars of high quality must meet the requirements given in table.3.
Table 3
| Grade | The test samples |
Bar diameter, mm | Temporary resistance |
Elongation |
The relative narrowing |
The impact strength KCU, j/cm |
| not less than | ||||||
| VT1−00 | Annealed | 10 to 12 incl. |
295−440 (30−45) | 25 | 55 | - |
| SV. 12 to 100 incl. |
295−440 (30−45) | 25 | 55 | 120 (12) | ||
| SV. 100 to 150 incl. |
265−440 (27−45) | 24 | 42 | 60 (6) | ||
| VT1−0 | Annealed | 10 to 12 incl. |
390−540 (40−55) | 20 | 50 | - |
| SV. 12 to 100 incl. |
390−540 (40−55) | 20 | 50 | 100 (10) | ||
| SV. 100 to 150 incl. |
355−540 (36−55) | 19 | 38 | 50 (5) | ||
| OT4−0 | Annealed | 10 to 12 incl. |
490−635 (50−65) | 20 | 40 | - |
| SV. 12 to 100 incl. |
490−635 (50−65) | 40 | 70 (7) | |||
| SV. 100 to 150 incl. |
440−635 (45−65) | 32 | 50 (5) | |||
| OT4−1 | Annealed | 10 to 12 incl. |
590−735 (60−75) | 15 | 35 | - |
| SV. 12 to 100 incl. |
590−735 (60−75) | 15 | 35 | 45 (4,5) | ||
| SV. 100 to 150 incl. |
540−735 (55−75) | 13 | 24 | 40 (4) | ||
| OT4 | Annealed | 10 to 12 incl. |
685−885 (70−90) | 11 | 30 | - |
| SV. 12 to 60 incl. |
685−885 (70−90) | 11 | 30 | 40 (4) | ||
| SV. 60 to 100 incl. |
685−885 (70−90) | Ten | 30 | 40 (4) | ||
| SV. 100 to 150 incl. |
635−885 (65−90) | 9 | 21 | 35 (3,5) | ||
| VT5 | Annealed | 10 to 12 incl. |
735−930 (75−95) | 10 | 25 | - |
| SV. 12 to 60 incl. |
735−930 (75−95) | 10 | 25 | 50 (5) | ||
| SV. 60 to 100 incl. |
735−930 (75−95) | 10 | 25 | 30 (3) | ||
| SV. 100 to 150 incl. |
715−930 (73−95) | 6 | 18 | 50 (5) | ||
| VT5−1 | Annealed | 10 to 12 incl. |
785−980 (80−100) | 10 | 25 | - |
| SV. 12 to 100 incl. |
785−980 (80−100) | 10 | 25 | 40 (4) | ||
| SV. 100 to 150 incl. |
745−980 (76−100) | 6 | 18 | 45 (4,5) | ||
| VT6 |
Annealed | 10 to 12 incl. |
905−1050 (92−107) |
10 |
30 |
- |
| SV. 12 to 60 incl. |
905−1050 (92−107) |
10 |
30 |
40 (4) | ||
| SV. 60 to 100 incl. |
905−1050 (92−107) |
10 |
25 |
30 (3) | ||
| SV. 100 to 150 incl. |
835−1050 (85−107) |
6 |
20 |
30 (3) | ||
| Hardened and aged | 10 to 12 incl. |
Not less than 1080 (110) | 6 |
20 |
- | |
| SV. 12 to 60 incl. |
30 (3) | |||||
| SV. 60 to 100 incl. |
25 (2,5) | |||||
| VT6S |
Annealed | 10 to 12 incl. |
835−980 (85−100) |
10 |
30 |
- |
| SV. 12 to 60 incl. |
835−980 (85−100) |
10 |
30 |
40 (4) | ||
| SV. 60 to 100 incl. |
835−980 (85−100) |
10 |
25 |
40 (4) | ||
| SV. 100 to 150 incl. |
755−980 (77−100) |
7 |
22 |
40 (4) | ||
| Hardened and aged | 10 to 12 incl. |
Not less than 1030 (105) | 6 |
20 |
- | |
| SV. 12 to 100 incl. |
30 (3) | |||||
| VT3−1 |
Annealed | 10 to 12 incl. |
980−1230 (100−125) |
10 |
30 |
- |
| SV. 12 to 60 incl. |
980−1230 (100−125) |
10 |
30 |
30 (3) | ||
| SV. 60 to 100 incl. |
980−1180 (100−120) |
10 |
25 |
30 (3) | ||
| SV. 100 to 150 incl. |
930−1180 (95−120) |
8 |
20 |
30 (3) | ||
| Hardened and aged | 10 to 12 incl. |
Not less than 1180 (120) |
6 |
20 |
- | |
| SV. 12 to 40 incl. |
20 |
20 (2) | ||||
| SV. 40 to 60 incl. |
16 |
18 (1,8) | ||||
| VT8 | Annealed | 10 to 12 incl. |
980−1230 (100−125) |
9 |
30 |
- |
| SV. 12 to 60 incl. |
980−1230 (100−125) |
9 |
30 |
30 (3) | ||
| SV. 60 to 100 incl. |
980−1180 (100−120) |
9 |
25 |
30 (3) | ||
| SV. 100 to 150 incl. |
930−1180 (95−120) | 7 | 19 | 30 (3) | ||
| VT9 | Annealed | 10 to 12 incl. |
1030−1230 (105−125) | 9 | 30 | - |
| SV. 12 to 50 incl. |
1030−1230 (105−125) | 9 | 30 | 30 (3) | ||
| SV. 50 to 100 incl. |
1030−1230 (105−125) | 9 | 25 | 30 (3) | ||
| SV. 100 to 150 incl. |
980−1230 (100−125) | 7 | 16 | 30 (3) | ||
| VT14 | Annealed | 10 to 12 incl. |
885−1080 (90−110) | 10 | 35 | - |
| SV. 12 to 30 incl. |
885−1080 (90−110) | 10 | 35 | 50 (5) | ||
| SV. 30 to 60 incl. |
885−1080 (90−110) | 10 | 35 | 50 (5) | ||
| SV. 60 to 100 incl. |
885−1080 (90−110) | 9 | 30 | 50 (5) | ||
| SV. 100 to 150 incl. |
865−1080 (88−110) | 8 | 25 | 45 (4,5) | ||
| Hardened and aged | 10 to 12 incl. |
Not less than 1100 (112) | 6 | 12 | - | |
| SV. 12 to 60 incl. |
Not less than 1100 (112) | 6 | 12 | 25 (2,5) | ||
| SV. 60 to 100 incl. |
Not less than 1080 (110) | 4 | 8 | 20 (2) | ||
| VT20 | Annealed | 10 to 12 incl. |
930−1130 (95−115) | 10 | 25 | - |
| SV. 12 up to 25 incl. |
930−1130 (95−115) | 10 | 25 | 30 (3) | ||
| SV. 25 to 100 incl. |
930−1130 (95−115) | 10 | 25 | 40 (4) | ||
| SV. 100 to 150 incl. |
885−1130 (90−115) | 8 | 20 | 30 (3) | ||
| VT22 | Annealed | 10 to 12 incl. |
1080−1230 (110−125) | 10 | Thirty | - |
| SV. 12 to 35 incl. |
1080−1230 (110−125) | 10 | 30 | 30 (3) | ||
| SV. 35 to 60 incl. |
1080−1230 (110−125) | 9 | 25 | 30 (3) | ||
| SV. 60 to 100 incl. |
1080−1280 (110−130) | 8 | 18 | 25 (2,5) | ||
| SV. 100 to 150 incl. |
1080−1280 (110−130) | 7 | 17 | 25 (2,5) | ||
| Hardened and aged | 10 to 12 incl. |
1280 (130) | 7 | 18 | - | |
| SV. 12 to 40 incl. |
7 | 18 | 20 (2) | |||
| SV. 40 to 60 incl. |
6 | 16 | 18 (1,8) | |||
(Changed edition, Rev. N 1).
3.5. Bars should be trimmed evenly with the ends. Cut end Squareness, mm should take a measuring rod or a multiple of standard length beyond the minimum length. Permitted crumpled ends and burrs.
3.6. Surface bars should not have cracks and sunsets.
On the surface of bars allowed some small slivers, flaws, scaliness, wrinkles, fingerprints, undercuts, Rabina and scratches, if the test mopping them does not take out the rod for limiting the negative deviation in diameter.
On the surface of the bars allowed us, not bringing the bar outside plus limit deviation for diameter.
Allowed cleaning and grinding the surface of the rods, if it does not take dimensions for limit deviation for diameter.
3.7. The macrostructure of bars should not have cracks, delaminations, voids, metallic and non-metallic inclusions visible to the naked eye.
The macrostructure of permitted surface defects, the depth of which does not exceed the set limit negative deviations.
3.7.1. Grain size for higher quality bars should not exceed:
4th points — for bars of alloys brands VT6, VT6S, VTZ-1, VT8, and VT9 VT14 with a diameter up to 60 mm, inclusive;
5th point- for rods of alloy grade VT22 with a diameter up to 60 mm, inclusive;
6th points for bars from VT22 alloy grade with a diameter of 55, 60 mm, mechanical properties of which are determined on annealed samples;
8th score — for bars of alloys brands VT6, VT6S, VTZ-1, VT8, VT9, VT14 and VT22 with a diameter of over 60 to 100 mm, inclusive;
9th grade- for bars of alloys brands VT6, VT6S, VTZ-1, VT8, VT9, VT14 and VT22 with a diameter of over 100 mm.
Allowed in the macrostructure of bars in the presence of individual sections with the grain size exceed 2 points for bars with diameter up to 60 mm inclusive, and 1 point for bars with diameter over 60 mm, if the total area of these plots does not exceed 20% of the area of macrolife.
3.8. Microstructure of bars of high-quality alloys brands VT6, VT6S, VTZ-1, VT14 with a diameter up to 60 mm inclusive, specified by a 9-typical scale should correspond to the 1−7-mu type, and alloy grade VT22, identified by 8-typical scale must match 1−6-mu types for bars with diameter up to 40 mm inclusive, 1−7-mu types — for bars with diameter over 40 up to 60 mm inclusive.
4. ACCEPTANCE RULES
4.1. Bars show the acceptance by the parties. The party must consist of bars of the same brand of titanium or a titanium alloy, melting the same, same quality, same accuracy, same diameter shall be furnished in one document about quality that contains:
trademark or the name and trademark of manufacturer;
the name of the consumer;
brand of titanium or titanium alloy and a group of quality;
size of bars;
the lot number or melt;
the weight of the party;
the results of the tests and modes of heat treatment of blanks for samples;
the date of shipment;
the designation of this standard.
Allowed to make a batch of bars in multiple heats, with each melting should be checked for compliance with the requirements of this standard.
(Changed edition, Rev. N 1).
4.2. To determine the chemical composition of the main components and impurities regulated — take away two rod from the party.
Other impurities not determined.
Allowed the manufacturer to determine the chemical composition of the main components for each cast, and regulated the impurities at each tenth smelting or install it in accordance with the document on the quality of the manufacturer bars.
4.3. Checking the surface quality and dimensions are subjected to each rod.
4.4. To check mechanical properties of selected 5% of the bars from the party, but at least two bars with diameter up to 60 mm, one rod from the party with a diameter of over 60 mm.
Mechanical properties of bars in hardened and aged samples test on demand of the consumer stipulated in the outfit, while the test of mechanical properties on annealed samples did not produce.
(Changed edition, Rev. N 2).
4.5. To check the macrostructure of a select 5% of the bars from the party, but at least two bars with diameter up to 60 mm inclusive, single rod from the party with a diameter of over 60 mm.
4.6. To check the microstructure of bars of high-quality alloys brands VT6, VT6S, VTZ-1, VT14 and VT22 take 5% of the bars from the party, but at least two bars with diameter up to 60 mm, one rod from the party with a diameter of over 60 mm.
Microstructure test in the control of mechanical properties in quenched and aged samples.
(Changed edition, Rev. N 2).
4.7. If unsatisfactory test results of at least one indicator thereon, a second test of the doubled sample taken from the same batch.
The results of repeated tests spread to the entire party.
Allowed to carry out routine testing of bars.
5. TEST METHODS
5.1. Selection and preparation of samples for determining the chemical composition of bars is carried out in the churchyard 24231−80.
5.2. Chemical composition of titanium and titanium alloys is determined by chemical method churchyard 25086−87, GOST 19863.1−80* — GOST 19863.13−80** or a spectral method for GOST 23902−79.
________________
* On the territory of the Russian Federation GOST 19863.1−91.
** On the territory of the Russian Federation GOST 19863.13−91. Here and hereinafter. — Note the manufacturer’s database.
In case of any disagreement, the chemical composition is determined by GOST 19863.1−80 — GOST 19863.13−80.
(Changed edition, Rev. N 1, 2).
5.3. The hydrogen content was determined by vacuum heating according to GOST 24956−81 or spectral method on OST 1 90034−81.
If a dispute arises, the hydrogen content is determined according to GOST 24956−81.
(Changed edition, Rev. N 2).
5.4. The content of nitrogen, carbon and oxygen is determined by normative-technical documentation.
5.5. The diameter of the rods is measured with a micrometer according to GOST 6507−90 or GOST 4381−87, caliper according to GOST 166−80* or other measuring tools that provide required accuracy of measurement.
______________
* On the territory of the Russian Federation GOST 166−89. — Note the manufacturer’s database.
The differences in diameter of bars measured with a micrometer according to GOST 6507−90.
The length of the bars test tape according to GOST 7502−89* or metal line of the churchyard 427−75.
______________
* On the territory of the Russian Federation GOST 7502−98. — Note the manufacturer’s database.
(Changed edition, Rev. N 1, 2).
5.6. Curvature and cosine of the cut bars is measured according to GOST 26877−86*.
______________
* On the territory of the Russian Federation GOST 26877−91. — Note the manufacturer’s database.
(Changed edition, Rev. N 1, 2).
5.7. Inspect the surface of the rods without the use of magnifying devices.
5.8. Tensile test (tensile strength, relative lengthening, relative narrowing) carried out on samples with a diameter of 5 mm according to GOST 1497−84.
The estimated length of the sample in millimeters set by the formula 
The speed of movement of the grippers tensile samples (at idle) machines should be 10−15 mm/min.
(Changed edition, Rev. N 2).
5.9. Test for impact strength is carried out at room temperature according to GOST 9454−78.
5.10. For testing the mechanical properties of each check rod in the longitudinal or transverse direction cut out one and breaking one impact sample.
Samples cut from billets representing the cut check the rod.
Blanks for the manufacture of samples before machining is subjected to heat treatment.
Samples in the longitudinal direction cut:
bars with diameter up to 35 mm inclusive — from the center section;
bars with diameter more than 35 mm at a distance of ½ radius from the surface.
The samples in the transverse direction is cut on the diameter. This allowed the displacement of the axis of the specimen by not more than 20 mm.
When testing mechanical properties of bars with a diameter of 60 to 150 mm, inclusive, using the specimens cut in the transverse direction, elongation and contraction can be reduced to 20% from the values determined during the test of mechanical properties of bars on the specimens cut in the longitudinal direction of the table.2, 3.
5.11. Macrostructure of bars on the cross check microtemplate cut from the same rod as the samples for testing of mechanical properties.
The grain size of bars is determined visually on a 10 point scale macrostructure given in mandatory Appendix 2.
(Changed edition, Rev. N 1, 2).
5.12. The microstructure is checked for the destroyed drum samples in the quantity prescribed to control the toughness. Microsection made in the cross section of the sample after mechanical testing.
Allowed verification of the microstructure of conduct on microtemplate.
The microstructure of bars made of alloys brands VT6, VT6S, VTZ-1 and VT14 determined by 9-typical scale at magnification of 450, given in obligatory Annex 3.
The microstructure of bars from VT22 alloy grade is determined by 8-typical scale at the magnification of 100, are shown in mandatory Appendix 4.
(Changed edition, Rev. N 2).
6. MARKING, PACKAGING, TRANSPORTATION AND STORAGE
6.1. Bars of the same size and the same brand of alloy are placed in bundles.
Tufts associated with string according to GOST 17308−88, soft steel wire according to GOST 3282−74 or tape according to GOST 3560−73, soft aluminum wire according to GOST 14838−78 or tape according to GOST 13726−78*, or rod according to GOST 21488−76** not less than two places when the length of the rod up to 4 m, inclusive, and in three to five places the length of the bar more than 4 m.
______________
* On the territory of the Russian Federation GOST 13726−97 act;
*8 In the territory of the Russian Federation GOST 21488−97. — Note the manufacturer’s database.
Allowed linking beams in the bunch.
Weight of cargo must not be more than 3500 kg.
(Changed edition, Rev. N 1).
6.1.1. When sending bars in the far North and remote areas of the packaging must meet the requirements of GOST 15846−79*.
______________
* On the territory of the Russian Federation GOST 15846−2002. — Note the manufacturer’s database.
6.2. By the end of each associated beam rods attach two labels indicating the brand of titanium or a titanium alloy, a batch number or smelting and stamp of the technical control Department of the manufacturer.
Allowed to mark the details of the consignee on the wooden slats, bound together with beams.
6.3. Each bar in a bundle with a diameter up to 60 mm from one end should be marked with paint. Marking paint shall consist of main color (yellow), characterizing the band material (titanium) and further, defines a particular brand of titanium or a titanium alloy.
Main color (yellow) applied for forming the rod with a strip in the form of a ring (semiring) of a width not exceeding 50 mm, Number of rods, marked in the background color, specifies the manufacturer, but not less than three rods in the beam.
Additional color is applied to the end or forming on each wire in accordance with table.4.
Table 4
| Grade |
Color marking |
| VT1−00 |
White+black |
| VT1−0 |
White |
| OT4−0 |
Green+white |
| OT4−1 |
Green+black |
| OT4 |
Green |
| VT5 |
Brown+white |
| VT5−1 |
Yellow |
| VT6 |
Brown+blue |
| VT6S |
Brown |
| VTZ-1 |
Red |
| VT8 |
Blue |
| VT9 |
Blue |
| VT14 |
Black+red |
| VT20 |
Black+yellow |
| VT22 |
Brown+green |
| VT1−2 |
Blue+red |
(Changed edition, Rev. N 2).
6.4. Each adopted rod with a diameter of over 60 mm are to be delivered unbranded with indication of alloy grades, heat number or batch number and the mark of the technical control Department of the manufacturer.
Put a stigma on the lateral surface at a distance of not more than 50 mm from the end face of one end of the rod.
Allowed to put the mark of indelible ink.
6.5. Bars transporterowych all types of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this form, ihost 12.3.009−76.
6.6. The cargo space is enlarged into transport packets in accordance with GOST and GOST 24597−81 23238−78.
Packaging bundles and individual rods, not bound in bundles, carried out in the churchyard 9557−87 pallets or without pallets with the use of bars not less than 50 mm with tying wire with diameter at least 2 mm in two turns according to GOST 3282−74 or tape sizes not less than 0.3−30 mm according to GOST 3560−73.
(Changed edition, Rev. N 1, 2).
6.7. Stowage and securing of cargo, including packaged and unpackaged in the rail funds must be in accordance with the conditions of loading and fastening of cargoes.
6.8. Transport marking of packages — according to GOST 14192−77* with the following additional inscriptions: the name of the semi-finished product, grade, lot number.
______________
* On the territory of the Russian Federation GOST 14192−96. — Note the manufacturer’s database.
6.9. Bars should be stored in covered warehouses or storage areas open and protected from mechanical damage and action of active chemical reagents.
Under specified storage conditions, the rods of titanium and titanium alloys consumer properties when stored do not change.
(Changed edition, Rev. N 1).
7. MANUFACTURER’S WARRANTY
The manufacturer guarantees the conformity of bars present standard requirements at observance of conditions of transportation and storage.
Warranty period of storage of rods from the date of manufacture in unheated warehouses not more than 10 years, on areas under cover for 5 years.
The frequency of inspection 1 time per year.
We examine the number of bars 3−5% of the party.
Section 7. (Added, Rev. N 2).
ANNEX 1 (reference). Conversion factors to calculate the approximate theoretical weight of 1 m of the bar from titanium alloys
ANNEX 1
Reference
| Grade |
The conversion factor |
| OT4−0 |
1,002 |
| OT4−1 |
1,011 |
| OT4 |
1,011 |
| VT5 |
0,977 |
| VT5−1 |
0,982 |
| VT6 |
0,989 |
| VT6S |
0,989 |
| VTZ-1 |
1,000 |
| VT8 |
1,004 |
| VT9 |
1,002 |
| VT14 |
1,004 |
| VT20 |
0,989 |
| VT22 |
1,027 |
| VT1−2 |
1,000 |
(Changed edition, Rev. N 1).
ANNEX 2 (mandatory). The scale of macrostructures (10-point)
ANNEX 2
Mandatory
APPENDIX 3 (obligatory). The scale of microstructures (9-typical)
APPENDIX 3
Mandatory
ANNEX 4 (required). The scale of microstructures (8-typical)
ANNEX 4
Mandatory
The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
M.: Publishing house of standards, 1985
