Steel 37ХН3А

Designation

Name The value
Designation GOST Cyrillic 37ХН3А
Designation GOST Latin 37XH3A
Transliteration 37HN3A
By chemical elements 37CrН3

Description

37ХН3А steel is used: for the production of gears, shafts, bushings, power studs, bolts, nuts, and other case parts, which are requirements of high strength, ductility and toughness of core and high surface hardness, working under shock loads and at low temperatures; for the manufacture of large heavy duty products heavy and power engineering.

Note

Structural steel high-quality stainless. Does not apply to welded structures. Not prone to temper embrittlement.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 1-92-156-90
Bars and shapes В32 TU 14-1-950-74

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
TU 14-1-950-74 0.33-0.41 ≤0.025 ≤0.025 0.25-0.55 1.2-1.6 0.17-0.37 3-3.5 Rest ≤0.25 ≤0.05 ≤0.03 ≤0.15 ≤0.2
Fe is the basis.

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 805-835 °C + Vacation at 525-575 °C, cooling in water or oil
≥930 ≥1080 ≥10 ≥50 ≥690 321-388

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