ASTM A672 H80 Grade B Introduce
ASTM A672 H80 Grade B is a high strength, low alloy steel that is used for many applications, including construction, engineering and automotive. It is a versatile material that can be used for both structural and mechanical applications, and is available in a wide variety of grades and shapes. ASTM A672 H80 Grade B is known for its superior mechanical properties, including tensile strength, yield strength, toughness, ductility, and stress-rupture strength.
Smelting temperature:1763°C - 1178°C
Application:Medium temperature and high pressure electric welding steel pipe
ASTM A672 H80 Grade B Material Chemical Composition
The chemical composition of the ASTM A672 H80 Grade B steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | - | 0.2000 |
| Manganese (Mn) | 1.1500 | 1.5000 |
| PhOsphorus (P) | - | 0.0250 |
| Sulfur (S) | - | 0.0250 |
| Silicon (Si) | 0.1500 | 0.4000 |
| Molybdenum (Mo) | 0.4500 | 0.6000 |
ASTM A672 H80 Grade B Material Mechanical Properties
The mechanical properties of the ASTM A672 H80 Grade B steel are as follows:
| YieldRp0.2 | ≤ 762 (MPa) |
| TeileRm | ≤ 333 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 44% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 243 |
ASTM A672 H80 Grade B Material Thermal Properties
The thermal performance parameters of the ASTM A672 H80 Grade B steel are as follows:
| Temperature (°C) | 22 | 219 | 779 |
| Modulus of elasticity (GPa) | - | 412 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 113 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 212 |
| Poisson’s coefficient, ν | - | - | 212 |