ASTM A709/A709M Grade 50W Type C Introduce
The American Society for Testing and Materials (ASTM) is a worldwide leader in the development and regulation of a range of industry standard specifications. This includes the ASTM A709/A709M steel standard – the specification most commonly used in Europe and the United States for structural steel. This standard is used to determine the mechanical properties of carbon and high-strength, low-alloy steels used for construction of bridges and other structures.
Smelting temperature:1416°C - 1765°C
Application:Structural steel for bridge
ASTM A709/A709M Grade 50W Type C Material Chemical Composition
The chemical composition of the ASTM A709/A709M Grade 50W Type C steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | 0.0100 | 0.1000 |
| Silicon (Si) | 0.1500 | 0.4000 |
| Sulfur (S) | - | 0.0500 |
| PhOsphorus (P) | - | 0.0400 |
| Nickel (Ni) | 0.2500 | 0.5000 |
| Manganese (Mn) | 0.8000 | 1.3500 |
| Copper (Cu) | 0.2000 | 0.5000 |
| Chromium (Cr) | 0.3000 | 0.5000 |
| Carbon (C) | - | 0.1500 |
ASTM A709/A709M Grade 50W Type C Material Mechanical Properties
Tensile strength is a measure of the maximum load applied to an object before it deforms, breaks, or is otherwise mechanically stressed. ASTM A709/A709M Grade 50W Type C steel has an exceptional combination of high strength and ductility, allowing it to withstand heavy loads without fracturing or losing shape. The tensile strength of the steel ranges from 485MPa to 620MPa, depending on the grade and alloy combination.
The mechanical properties of the ASTM A709/A709M Grade 50W Type C steel are as follows:
| YieldRp0.2 | ≤ 568 (MPa) |
| TeileRm | ≤ 872 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 443 |
ASTM A709/A709M Grade 50W Type C Material Thermal Properties
The thermal performance parameters of the ASTM A709/A709M Grade 50W Type C steel are as follows:
| Temperature (°C) | 24 | 695 | 865 |
| Modulus of elasticity (GPa) | - | 961 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 432 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.22 | - | - |
| Deity (kg/dm³) | - | - | 314 |
| Poisson’s coefficient, ν | - | - | 321 |