Steel 12Г1Р

Designation

Name The value
Designation GOST Cyrillic 12Г1Р
Designation GOST Latin 12G1P
Transliteration 12G1R
By chemical elements 12Mn1B

Description

12Г1Р steel is used: for the manufacture of high strength fasteners by cold forging.

Note

Steel boron alloy. Hot rolled and gorjachekatannyj rental comes with standard hardenability.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-4459-88, TU 14-1-5490-2004

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Al B
TU 14-1-5490-2004 0.1-0.15 ≤0.015 ≤0.02 0.9-1.3 0.15-0.3 ≤0.17 ≤0.1 Rest ≤0.1 ≤0.01 0.02-0.05 0.002-0.005
Fe is the basis.
According to TU 14-1-5490-2004 the chemical composition is given for steel grade 12G1R.

Mechanical properties

σU, MPa d5, % y, % HRC
The hot rolled gorjachekatannyj. Without heat treatment delivery condition
≤570 ≥28 ≥60 -
The hot rolled gorjachekatannyj. Heating for hardening up to 920 °C, exposure for 1 h, cooling in oil at a temperature of 40-80 °C (cooling time 7-8 min., time of sample transfer from the furnace to the quenching tank is not more than 5 seconds) + holiday: temperatures up to 450 °C (aging 50 min, excluding the time of heating), air cooling (HRC hardness in the Central zone after quenching, after quenching with tempering)
≤490 ≥30 ≥62 ≥32/22

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
HRC Rockwell hardness (indenter diamond spheroconical)