A242 Type 1 is a kind of weather-resistant structural steel. It is a high-strength, low-alloy weather-resistant steel specified by the standard ASTM A242/A242M established by the American Society for Testing and Materials (ASTM). This type of steel is designed to provide effective protection when exposed to atmospheric conditions, with a stable layer of rust forming on the surface, reducing the risk of corrosion of the metal within.
A242 Type 1 steel is characterized by excellent weather resistance: through alloying design, when the steel is exposed to the atmosphere, a dense and highly adhesive rust layer can be formed on the surface. This rust layer can effectively block further erosion by oxygen and moisture. base metal. High strength: A242 Type 1 steel has a high strength level and is suitable for use in structural components that need to withstand larger loads. Lower maintenance costs: Due to its corrosion resistance, frequent anti-corrosion coating maintenance is not required during long-term use.
ASTM A242 Type 1 ASTM A242/A242M Mechanical properties
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 892 (≥) | 525 (≥) | 41 | 32 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 134 |
ASTM A242 Type 1 ASTM A242/A242M Physical properties
Physical properties of ASTM A242 Type 1 ASTM A242/A242M mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 11 | - | - | 0.11 | - | |||
| 585 | 257 | - | 14.3 | 213 | - | ||
| 329 | - | 12 | 14.2 | 122 | 323 |
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