Steel АЦ40Х
Designation
| Name |
The value |
| Designation GOST Cyrillic |
АЦ40Х |
| Designation GOST Latin |
ATs40X |
| Transliteration |
ATs40H |
| The 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 |
| 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 |
0.36-0.44 |
0.035-0.06 |
≤0.035 |
0.5-0.8 |
0.8-1.1 |
0.17-0.37 |
≤0.3 |
The 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 characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| Bars on the other 14-1-3283-81 |
| Образец 25х25 |
≥785 |
≥980 |
≥10 |
≥45 |
≥590 |
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 |
| kJ/m2 |
Toughness |
Technological properties
| Name |
The value |
| Features of production |
Bars on the other 14-1-3283-81 are supplied with heat treatment (after annealing or high tempering), hardness ≤217НВ. |
