Steel 30KHRA

Designation

Name The value
Designation GOST Cyrillic 30ХРА
Designation GOST Latin 30XPA
Transliteration 30HRA
By chemical elements 30CrB

Description

30KHRA steel is used: for the manufacture of axles, shafts, levers, bolts, nuts and other small parts as well as gears, shafts and loaded pins of load-bearing structures.

Note

Structural steel high quality chrome.

Standards

Name Code Standards
Bars and shapes В32 GOST 4543-71, GOST 14955-77, GOST В 5160-89, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, 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
Steel pipes and fittings to them В62 TU 14-3-798-79

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu B Ti Mo
GOST 4543-71 0.27-0.33 ≤0.025 ≤0.025 0.5-0.8 1-1.3 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.001 ≤0.03 ≤0.15
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Quenching in oil from 900 °C + vacation at 200 °C, air cooling
1300 1600 9 40 500

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
KCU Toughness