Steel АЦ40
Designation
| Name |
The value |
| Designation GOST Cyrillic |
АЦ40 |
| Designation GOST Latin |
ATs40 |
| Transliteration |
ATs40 |
| The chemical elements |
- |
Description
АЦ40 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 |
| Sectional and shaped rolling |
В32 |
TU 14-1-3283-81 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Ca |
| TU 14-1-3283-81 |
0.37-0.45 |
0.035-0.06 |
≤0.035 |
0.5-0.8 |
≤0.25 |
0.17-0.37 |
≤0.25 |
The rest |
≤0.25 |
0.03-0.09 |
Fe is the basis.
According to TU 14-1-3283-81 chemical analysis is given for steel grade AC40. 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. In steel, the mass fraction of arsenic is not more than 0.080%. In steel, smelted with scrap-process, a mass fraction of copper and nickel is allowed up to 0.030% of each. The mass fraction of nitrogen in oxygen-converter steel should not exceed 0.0080%. In finished bars, subject to the requirements of the technical specification, deviations in chemical composition are allowed: by carbon ± 0.010%, for manganese ± 0.030%, for silicon ± 0.020%, for sulfur and phosphorus +0.0050% for each.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
| Bars on the other 14-1-3283-81 |
|
≥335 |
≥570 |
≥19 |
≥45 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
Technological properties
| Name |
The value |
| Features of production |
Bars on the other 14-1-3283-81 are supplied without heat treatment with hardness ≤217НВ. |
