Steel 40KHMFA (40ХМФ)

Designation

Name The value
Designation GOST Cyrillic 40ХМФА
Designation GOST Latin 40XMFA
Transliteration 40HMFA
By chemical elements 40CrMoV
Name The value
Designation GOST Cyrillic 40ХМФ
Designation GOST Latin 40XMF
Transliteration 40HMF
By chemical elements 40CrMoV

Description

40KHMFA steel is used: for the manufacture of spline shafts, brushes, rods, fasteners pipelines operating at temperatures up to +400 °C.

Note

Structural steel high quality chrome-molybdenum-vanadium.

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 14-1-5228-93, 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 Ti Mo W
GOST 4543-71 0.37-0.44 ≤0.025 ≤0.025 0.4-0.7 0.8-1.1 0.17-0.37 ≤0.3 Rest ≤0.3 0.1-0.18 ≤0.03 0.2-0.3 ≤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%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Rolled steel. Quenching in oil from 860 °C to + Vacation at 580 °C, cooling in oil
25 ≥930 ≥1030 ≥13 ≥50 ≥880

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