Steel АЦ40Х

Designation

Name The value
Designation GOST Cyrillic АЦ40Х
Designation GOST Latin ATs40X
Transliteration ATs40H
By chemical elements -

Description

АЦ40Х steel is used: for the production of bars intended for the manufacture of automotive components by hot forming with subsequent machining.

Note

Calcium-containing steel of high machinability.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-3283-81

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Ca
TU 14-1-3283-81 0.36-0.44 0.035-0.06 ≤0.035 0.5-0.8 0.8-1.1 0.17-0.37 ≤0.3 Rest ≤0.3 0.03-0.09
Fe is the basis.
According to TU 14-1-3283-81 chemical analysis is given for steel grade AC40X. In the designation of steel letters mean: A - automatic, C - calcium. Microalloying of calcium steel is carried out by silicocalcium and other calcium alloys at the rate of introduction of 0,030-0,090% of calcium into liquid metal. The mass fraction of calcium is not determined by chemical analysis. The presence of tungsten to 0.20%, molybdenum to 0.15%, titanium to 0.030% and vanadium to 0.050% is not a defect. In the finished bars, subject to the requirements of technical specifications, deviations in chemical composition are allowed: in carbon ± 0.010%, in manganese ± 0.020%, in silicon ± 0.020%, in chromium ± 0.050%, in nickel -0.050%, in sulfur and phosphorus + 0.0050% of each. When smelting steel with a scrap process, the residual mass fraction of nickel is allowed up to 0.40%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Bars on the other 14-1-3283-81
Образец 25х25 ≥785 ≥980 ≥10 ≥45 ≥590

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

Technological properties

Name The value
Particularities of production of goods Bars on the other 14-1-3283-81 are supplied with heat treatment (after annealing or high tempering), hardness ≤217НВ.