ASTM A568/A568M Grade 1040 Introduce
ASTM A568/A568M is an American material standard for steel that covers both hot-rolled and cold-rolled carbon steel sheets and strips. It was first issued in 1994 and revised in 2020. ASTM A568/A568M Grade 1040 is used for steel products such as coils, sheets, bars, strips, plates, and structural shapes such as angles, channels and rounds. This material is regarded as high-quality and is specified for a wide variety of purposes.
Smelting temperature:1567°C - 1412°C
Application:Hot rolled and cold rolled high strength low alloy carbon steel sheet
ASTM A568/A568M Grade 1040 Material Chemical Composition
The chemical composition of the ASTM A568/A568M Grade 1040 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1000 | 0.2500 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0300 |
| Manganese (Mn) | 0.6000 | 0.9000 |
| Carbon (C) | 0.3700 | 0.4400 |
ASTM A568/A568M Grade 1040 Material Mechanical Properties
ASTM A568/A568M is the American Society for Testing and Materials (ASTM) International standard which specifies the requirements for carbon steel, high-strength low-alloy (HSLA) steel for use in structural applications. It covers various grades of HSLA and other steels such as carbon steel, cold-rolled steel and hot-rolled steel.
The mechanical properties of the ASTM A568/A568M Grade 1040 steel are as follows:
| YieldRp0.2 | ≤ 465 (MPa) |
| TeileRm | ≤ 265 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 232 |
ASTM A568/A568M Grade 1040 Material Thermal Properties
The thermal performance parameters of the ASTM A568/A568M Grade 1040 steel are as follows:
| Temperature (°C) | 22 | 632 | 921 |
| Modulus of elasticity (GPa) | - | 963 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 324 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.43 | - | - |
| Deity (kg/dm³) | - | - | 221 |
| Poisson’s coefficient, ν | - | - | 112 |