Steel A20

Designation

Name The value
Designation GOST Cyrillic А20
Designation GOST Latin A20
Transliteration A20
By chemical elements -

Description

Steel A20 is used: for the manufacture of small parts and machines, lightly loaded parts of complex configuration requirements of high dimensional accuracy and surface quality; after carburizing and cyanidation — lightly loaded parts, which are tejavanija wear resistance and high surface quality.

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 0.17-0.25 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
≥450 ≥20 ≥30 ≤168
Rental of calibrated and full hard without heat treatment
≥530 ≥7 - ≤217

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 - 1180 °C, the end - 850 °C.
Flock-sensitive sensitivity sensitive