Steel 27KHGR

Designation

Name The value
Designation GOST Cyrillic 27ХГР
Designation GOST Latin 27XGP
Transliteration 27HGR
By chemical elements 27CrMnB

Description

27KHGR steel is used: for the manufacture of parts for critical applications: jaw-joint front drive axle, gear wheels and other parts.

Note

Structural steel quality chromatorgraphy.

Standards

Name Code Standards
Bars and shapes В32 GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008
Bars and shapes В22 GOST 8319.0-75
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V B Ti
GOST 4543-71 0.25-0.31 ≤0.035 ≤0.035 0.7-1 0.7-1 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.05 0.001-0.005 ≤0.06
Fe is the basis.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, % y, %
Quenching in oil from 870 °C to + vacation at 200 °C
1200 1400 8 45

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
y The relative narrowing

Technological properties

Name The value
Weldability difficult weldability
Склонность к отпускной хрупкости inclined
Flock-sensitive sensitivity sensitive