Steel A40G

Designation

Name The value
Designation GOST Cyrillic А40Г
Designation GOST Latin A40G
Transliteration A40G
By chemical elements -

Description

Steel A40G is used: for the manufacture of parts of complex shape, obrabatyvatsya on machines, and parts, which are increased requirements to the surface finish running at higher voltages and pressures (axles, rollers, bushings, rings, gears, fingers, screws, bolts, nuts, lead screws).

Note

Serotonergically steel high machinability.

Standards

Name Code Standards
Bars and shapes В32 GOST 1414-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88
Bars and shapes В22 GOST 2590-2006, GOST 2591-2006, GOST 2879-2006

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
GOST 1414-75 0.37-0.45 0.18-0.3 ≤0.05 1.2-1.55 ≤0.25 0.15-0.35 ≤0.25 Rest ≤0.25
Fe is the basis.

Mechanical properties

Section, mm σU, MPa d5, % y, % HB, MPa
The hot rolled, without heat treatment
≥590 ≥14 ≥20 ≤207
Rolled calibrated. High tempering (annealing)
≥590 ≥17 - ≤229

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
HB Brinell hardness number

Technological properties

Name The value
Склонность к отпускной хрупкости inclined
The temperature of forging Start - 1100 °C, the end - of 800 °C.
Flock-sensitive sensitivity sensitive