ASTM A568/A568M Grade 1070 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 1070 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:1888°C - 1785°C
Application:Hot rolled and cold rolled high strength low alloy carbon steel sheet
ASTM A568/A568M Grade 1070 Material Chemical Composition
The chemical composition of the ASTM A568/A568M Grade 1070 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) | 0.6500 | 0.7500 |
ASTM A568/A568M Grade 1070 Material Mechanical Properties
ASTM A568/A568M Grade 1070 is the American Society for Testing and Materials (ASTM) International standard for carbon steel, high-strength low-alloy (HSLA) steel for use in structural applications. It covers a variety of grades and product forms such as hot-rolled, cold-rolled, galvanized, aluminized, coated, and tempered steel. The standard provides requirements for chemical, mechanical and physical properties and defines five major groups of steel, each of which is further broken down into grades. Heat treatment is an important factor in achieving desired mechanical properties, and is often employed to enhance weldability.
The mechanical properties of the ASTM A568/A568M Grade 1070 steel are as follows:
| YieldRp0.2 | ≤ 518 (MPa) |
| TeileRm | ≤ 322 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 443 |
ASTM A568/A568M Grade 1070 Material Thermal Properties
The thermal performance parameters of the ASTM A568/A568M Grade 1070 steel are as follows:
| Temperature (°C) | 43 | 624 | 859 |
| Modulus of elasticity (GPa) | - | 637 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 144 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 224 |
| Poisson’s coefficient, ν | - | - | 431 |