ASTM A709/A709M A709 Grade HPS 485W Introduce
ASTM A709/A709M A709 Grade HPS 485W is a type of high strength, low-alloy structural steel designed to provide superior corrosion resistance and enhanced strength at elevated temperatures. The standard specifies the grades, types, shapes and sizes of {stnadard} steel that meet the requirements for performance in various applications. A709/A709M steel is available as a full range of plates, sheets, strips, bars, shapes, and rounds and is used in a wide variety of applications in the construction industry.
Smelting temperature:1948°C - 1745°C
Application:Structural steel for bridge
ASTM A709/A709M A709 Grade HPS 485W Material Chemical Composition
The chemical composition of the ASTM A709/A709M A709 Grade HPS 485W steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | - | 0.0150 |
| Copper (Cu) | 0.2500 | 0.4000 |
| Aluminum (Al) | 0.0100 | 0.0400 |
| Vanadium (V) | 0.0400 | 0.0800 |
| Molybdenum (Mo) | 0.0200 | 0.0800 |
| Nickel (Ni) | 0.2500 | 0.4000 |
| Chromium (Cr) | 0.4500 | 0.7000 |
| PhOsphorus (P) | - | 0.0200 |
| Sulfur (S) | - | 0.0060 |
| Manganese (Mn) | 1.1000 | 1.3500 |
| Silicon (Si) | 0.3000 | 0.5000 |
| Carbon (C) | - | 0.1100 |
| Sulfur (S) | - | 0.0060 |
| Manganese (Mn) | 1.1000 | 1.3500 |
ASTM A709/A709M A709 Grade HPS 485W Material Mechanical Properties
Elasticity is a measure of an object's ability to return to its original shape after being subjected to a load. ASTM A709/A709M A709 Grade HPS 485W steel is highly elastic, with an elastic modulus ranging from 190GPa to 300GPa. This allows the steel to be compressed or twisted without permanently deforming, allowing it to return to its original shape when the load is removed.
The mechanical properties of the ASTM A709/A709M A709 Grade HPS 485W steel are as follows:
| YieldRp0.2 | ≤ 368 (MPa) |
| TeileRm | ≤ 576 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 142 |
ASTM A709/A709M A709 Grade HPS 485W Material Thermal Properties
The thermal performance parameters of the ASTM A709/A709M A709 Grade HPS 485W steel are as follows:
| Temperature (°C) | 13 | 241 | 759 |
| Modulus of elasticity (GPa) | - | 116 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 213 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 331 |
| Poisson’s coefficient, ν | - | - | 333 |