ASTM A576 Grade 1021 Introduce
ASTM A576 Grade 1021 is a special-graded steel with a unique chemical composition and a wide range of mechanical properties. The steel is manufactured by a modified version of the open-hearth process, making it ideal for a wide range of engineering and construction applications. ASTM A576 Grade 1021 is a low-alloy steel and is primarily used in pipe and structural applications requiring high strength and lower temperatures. The steel has a relatively low-carbon content, making it a versatile and cost-effective option.
Smelting temperature:1649°C - 1695°C
Application:Super hot rolled carbon steel rod
ASTM A576 Grade 1021 Material Chemical Composition
The chemical composition of the ASTM A576 Grade 1021 steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0500 |
| Manganese (Mn) | 0.7000 | 1.0000 |
| Carbon (C) | 0.1800 | 0.2300 |
| Silicon (Si) | - | 0.1000 |
| Copper (Cu) | 0.2000 | - |
| Boron (B) | 0.0005 | 0.0030 |
ASTM A576 Grade 1021 Material Mechanical Properties
The mechanical properties of the ASTM A576 Grade 1021 steel are as follows:
| YieldRp0.2 | ≤ 724 (MPa) |
| TeileRm | ≤ 175 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
ASTM A576 Grade 1021 Material Thermal Properties
The thermal performance parameters of the ASTM A576 Grade 1021 steel are as follows:
| Temperature (°C) | 31 | 692 | 386 |
| Modulus of elasticity (GPa) | - | 591 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 444 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 222 |
| Poisson’s coefficient, ν | - | - | 132 |
ASTM A576 Grade 1021 Material Machining Technology
Machining ASTM A576 Grade 1021 steel requires special attention and consideration due to its hardenability and wide range of alloying elements. When machining ASTM A576 Grade 1021 steel, it is important to ensure that proper allowances are made for the initial cutting tool (e.g. drill bit) and the speed of the procedure.