Steel 15KHA

Designation

Name The value
Designation GOST Cyrillic 15ХА
Designation GOST Latin 15XA
Transliteration 15HA
By chemical elements 15Cr

Description

15KHA steel is used: for the manufacture of bushings, fingers, gears, rollers, pushers and other carburized parts, which required high surface hardness with a low strength of the core; parts operating in conditions of wear by friction.

Note

Steel construction high quality chrome.

Standards

Name Code Standards
Bars and shapes В32 GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-1-950-74, TU 14-1-3238-81, TU 14-11-245-88, TU 14-1-3238-2006, 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, TU 1-92-156-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
TU 14-1-950-74 0.12-0.17 ≤0.025 ≤0.025 0.4-0.7 0.7-1 0.17-0.37 ≤0.3 Rest ≤0.25 ≤0.05 ≤0.03 ≤0.15 ≤0.2
GOST 4543-71 0.12-0.17 ≤0.025 ≤0.025 0.4-0.7 0.7-1 0.17-0.37 ≤0.3 Rest ≤0.3 ≤0.05 ≤0.03 ≤0.15 ≤0.2
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
According to TU 14-1-3238-81 for grade 15ХА-СШ the content of S≤0.015%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Bars and strip hot rolled and forged. Quenching in oil with 840-880 °C + quenching in oil from 780-820 °C + vacation at 150-170 °C, air cooling
15 ≥393 ≥589 ≥15 ≥50 ≥880 170-302
Bars and stripes. Quenching in oil, 860-900 °C + Vacation at 150-170 °C, air cooling
≥390 ≥590 ≥15 ≥50 ≥882 170-302

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
HB Brinell hardness number