ASTM A108 1139 Introduce
ASTM A108 1139 is a specification standard established by ASTM International for cold-finished carbon steel bars. This standard covers a wide range of carbon steel bar products that have undergone cold working processes, resulting in improved dimensional accuracy, surface finish, and mechanical properties.
Smelting temperature:1876°C - 1565°C
Application:High-quality cold-worked carbon steel bar technical specifications
ASTM A108 1139 Material Chemical Composition
The chemical composition of the ASTM A108 1139 steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | 0.1300 | 0.2000 |
| Manganese (Mn) | 1.3500 | 1.6500 |
| Silicon (Si) | 0.1500 | 0.3500 |
| Carbon (C) | 0.3500 | 0.4300 |
ASTM A108 1139 Material Mechanical Properties
The mechanical properties of the ASTM A108 1139 steel are as follows:
| YieldRp0.2 | ≤ 582 (MPa) |
| TeileRm | ≤ 612 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 231 |
ASTM A108 1139 Material Thermal Properties
The thermal performance parameters of the ASTM A108 1139 steel are as follows:
| Temperature (°C) | 11 | 387 | 167 |
| Modulus of elasticity (GPa) | - | 582 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 314 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 443 |
| Poisson’s coefficient, ν | - | - | 444 |