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Steel 15 (15A)

Designation

Name The value
Designation GOST Cyrillic 15
Designation GOST Latin 15
Transliteration 15
The chemical elements 15
Name The value
Designation GOST Cyrillic 15А
Designation GOST Latin 15A
Transliteration 15A
The chemical elements 15

Description

Steel 15 used: for the manufacture of sheet metal, 1−2 mm 4−14 category, intended for cold forming; bolts, screws, hooks and other parts, which are requirements of high plasticity and working at temperatures from -40 °C to +450 °C; after HTO (chemical heat treatment) — levers, Cams, fasteners, and other parts, which are requirements of high surface hardness and low strength of the core; welded pipes; welded cold-deformed pipes for cardan shafts of automobiles, tractors and machines; bardney wire designed for weaving bird.

Note

The degree of deoxidation — SP.

Standards

Name Code Standards
Sectional and shaped rolling В32 GOST 1050-88, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, TU 14-1-5414-2001, TU 14-1-2118-77, TU 14-130-49-90, TU 14-1-3514-83, TU 14-1-3651-83, TU 14-1-3697-84, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Sheets and stripes В33 GOST 1577-93, GOST 4041-71, TU 14-1-3579-83, TU 14-1-450-72, TU 14-1-4516-88
Tapes В34 GOST 2284-79, GOST 10234-77, GOST 19851-74
Pipes steel and connecting parts to them В62 GOST 3262-75, GOST 5005-82, GOST 10704-91, GOST 10705-80, GOST 10707-80, GOST 20295-85, GOST 24950-81, TU 14-3-1428-86, TU 1373-022-05757850-08, TU 1373-013-02949352-2003
Tapes В24 GOST 3560-73
Steel wire medium- and high-carbon В72 GOST 3920-70, GOST 7372-79, GOST 9389-75, GOST 9850-72, GOST 17305-91, GOST 26366-84
Low-carbon steel wire В71 GOST 5437-85, GOST 5663-79
Sheets and stripes В23 GOST 82-70, GOST 14918-80, GOST 16523-97, GOST 16523-89, GOST 16523-70, GOST 103-2006, GOST 19903-90, TU 14-1-1934-76, TU 14-1-4632-93
Sectional and shaped rolling В22 GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 10551-75, GOST 11474-76, GOST 30245-2003, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9087-84
Metal forming. Forgings В03 GOST 8479-70, OST 5Р.9125-84, ST ЦКБА 010-2004
Bulls. Blanks. Slabs В31 OST 3-1686-90, TU 14-1-281-72, TU 14-1-4944-90

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % d4 d d10 y, % kJ/m2, кДж/м2 Brinell hardness number, MPa HRB
Rolled sheet 1-2 categories of heat-treated (annealing, normalization, high tempering or normalizing + tempering) in the delivery state according to GOST 4041-71
4-14 - 320-440 ≥30 - - ≥26 - - ≤121 ≤68
Wire for cold heading as supplied by GOST 5663-79
- - 470-620 - - - - ≥55 - - -
- - ≤640 - - - - ≥50 - - -
Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal
≥225 ≥372 ≥22 - - - - - - -
Hot-rolled steel and hot rolled with special surface finish
- - - - - - - - - ≤143 -
- - - - - - - - - ≤125 -
Steel calibrated and calibrated with special surface finish
- - ≥440 ≥8 - - - ≥45 - ≤197 -
- - 360-470 - - - - ≥55 - ≤149 -
- - 320-420 - - - - ≥55 - ≤149 -
Electric-welded cold-deformed pipes for cardan shafts according to GOST 5005-82
≥430 ≥510 ≥8 - - - - - - -
Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 (include delivery)
- - 490-830 - - - - - - - -
- - 390-540 - - - - - - - -
- - 540-690 - - - - - - - -
- - 690-830 - - - - - - - -
- - ≤540 - - ≥15 - - - - -
- - ≤410 - - - - - - - -
Reed wire can supply according to GOST 5437-85
0.8-2.2 - 490-640 - - - - - - - -
2.3-3 - 440-590 - - - - - - - -
3.1-8.5 - 390-540 - - - - - - - -
Cold-rolled steel strip of 0.1-4.0 mm in the delivery state according to GOST 2284-79
- - 440-780 - - - - - - - -
- - 310-490 - ≥20 - - - - - -
The normalized or hot rolled strip
- ≥370 ≥27 - - - ≥55 - - -
Steel, hot-rolled, forged, calibrated and silverfish 2nd category after normalization
- ≥375 ≥27 - - - ≥55 - - -
Steel grooved 5-th category after annealing or high holidays
- ≥345 ≥23 - - - ≥55 - - -
Forgings. Normalizatsiya
100-300 ≥175 ≥355 ≥24 - - - ≥50 ≥579 101-143 -
100 ≥175 ≥355 ≥28 - - - ≥55 ≥628 101-143 -
100 ≥195 ≥390 ≥26 - - - ≥55 ≥579 111-156 -
Hot-rolled sheet in the delivery condition. Group strength К330В
≤2 - 330-460 - ≥23 - - - - - ≤73
2-3.9 - 330-460 - ≥24 - - - - - ≤73
Cold-rolled sheet in the delivery condition. Group strength К330В
≤2 - 330-460 - ≥24 - - - - - ≤73
2-3.9 - 330-460 - ≥25 - - - - - ≤73
The rod 45 mm. Normalization at 900-920 °C + Vacation at 650-660 °C, air cooling
- ≥215 ≥420 ≥33 - - - ≥70 - - -
- ≥205 ≥400 ≥24 - - - ≥68 - - -
- ≥170 ≥420 ≥24 - - - ≥63 - - -
- ≥150 ≥380 ≥33 - - - ≥71 - - -
- ≥150 ≥235 ≥36 - - - ≥75 - - -

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
d4 Elongation after rupture
d Elongation after rupture
d10 Elongation after rupture
y The relative narrowing
kJ/m2 Toughness
HRB Rockwell hardness (indenter steel, spherical)

Technological properties

Name The value
Weldability Without limitation, except HTO parts; welding methods: SMAW, submerged arc ADS and gateway protection of the CCC.
Propensity to temper brittleness Tend not.
Forging temperature Beginning - 1300 °C, end - 700 °C. air Cooling.
Flock-sensitive sensitivity not sensitive.
Workability by cutting In hot-rolled state when HB 143 Kn TV.SPL.=1,8.

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