Steel A30

Designation

Name The value
Designation GOST Cyrillic А30
Designation GOST Latin A30
Transliteration A30
By chemical elements -

Description

A30 steel is used: for the manufacture of complex-shaped parts, processed by CNC-machines; parts, which are increased requirements to the surface quality, operating at higher voltages and pressures (axes, Velikov, bushings, rings, gears, fingers, screws, bolts, nuts).

Note

Sulfur carbon 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 0.26-0.35 0.08-0.15 ≤0.06 0.7-1 ≤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
≥510 ≥15 ≥25 ≤185
Rental of calibrated and full hard without heat treatment
≥540 ≥6 - ≤223

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
Weldability does not apply to welded structures
Склонность к отпускной хрупкости tend not
The temperature of forging Start - 1200 °C, the end - 850 °C.
Flock-sensitive sensitivity sensitive