Steel 15GF

Designation

Name The value
Designation GOST Cyrillic 15ГФ
Designation GOST Latin 15GF
Transliteration 15GF
By chemical elements 15MnV

Description

Steel 15GF used: for the production of sheet welded structures of car building.

Note

Low alloy steel manganese-vanadium. The degree of deoxidation — SP.
Steel 15GF provides strength class long products, strip and shaped rolled CP 325 with a thickness up to 32 mm., KP 345 at a thickness of from 10 to 20 mm., KP 375 in thicknesses up to 10 mm.
Steel 15GF provides strength grade sheet, universal broadband rental and roll-formed profiles KP 325 with plate thickness of from 20 to 32 mm., KP KP 345 and 355 with a thickness of 10 to 20 mm., KP 375 in thicknesses up to 10 mm. without the use of additional hardening treatment.

Standards

Name Code Standards
Classification, nomenclature and General rules В20 GOST 19281-89
Steel pipes and fittings to them В62 GOST 20295-85, GOST 24950-81
Sheets and strips В23 GOST 82-70, GOST 17066-94, GOST 19282-73
Bars and shapes В22 GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76
Sheets and strips В33 TU 14-1-4431-88
Bars and shapes В32 TU 14-136-367-2008

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N As Al V Ti Nb
GOST 17066-94 0.12-0.18 ≤0.04 ≤0.035 0.9-1.2 ≤0.03 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.008 ≤0.08 ≤0.03 0.05-0.1 ≤0.03 ≤0.03
GOST 19282-73 0.12-0.18 ≤0.04 ≤0.035 0.9-1.2 ≤0.03 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.008 ≤0.08 ≤0.05 0.05-0.12 ≤0.03 -
Fe is the basis.
According to GOST 17066-94, the mass fraction of arsenic is allowed up to 0.015%, with the mass fraction of phosphorus being not more than 0.030%.
According to GOST 19282-73, it is allowed to modify steel with calcium and rare-earth elements from the calculation of the introduction of not more than 0.02% calcium and 0.05% rare-earth elements into the metal.
According to GOST 19281-89 and GOST 19282-73, it is allowed to add aluminum and titanium from the calculation of the mass fraction in the rolled aluminum - no more than 0.050%, titanium - no more than 0.030%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % d4
Steel hot-rolled sheet in the delivery condition
≤10 ≥380 ≥520 ≥21 -
10-32 ≥340 ≥480 ≥21 -
Bars and shapes of high-strength steel in the delivery state according to the GOST 19281-89 (specified strength class)
≤32 ≥325 ≥450 ≥21 -
10-20 ≥345 ≥480 ≥21 -
≤10 ≥375 ≥510 ≥21 -
The plates and universal broadband in the state of delivery GOST 19282-73
≤10 ≥375 ≥510 ≥21 -
10-20 ≥355 ≥510 ≥21 -
Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94
0.5-3.9 ≥355 ≥510 - ≥18
The plates and universal broadband in the state of delivery GOST 19282-73
20-32 ≥335 ≥470 ≥21 -
Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94
0.5-3.9 ≥355 ≥480 - ≥18

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
d4 Elongation after rupture

Technological properties

Name The value
Weldability without restrictions
Склонность к отпускной хрупкости tend not
Flock-sensitive sensitivity not sensitive