ASTM A675/A675M Grade 345 Introduce
ASTM A675/A675M Grade 345 is an alloy titanium steel which is used for many industrial and mechanical applications. It has excellent mechanical properties, including high strength, good impact resistance, excellent corrosion resistance, good weldability and machinability, and good fatigue strength. This steel is also noteworthy for its ductility, as it can be cold-formed, and can be effectively used in high-temperature environments.
Smelting temperature:1155°C - 1692°C
Application:Mechanical properties of special hot rolled carbon steel rods
ASTM A675/A675M Grade 345 Material Chemical Composition
The chemical composition of the ASTM A675/A675M Grade 345 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Sulfur (S) | - | 0.0500 |
| PhOsphorus (P) | - | 0.0400 |
| Copper (Cu) | 0.2000 | - |
ASTM A675/A675M Grade 345 Material Mechanical Properties
The mechanical properties of the ASTM A675/A675M Grade 345 steel are as follows:
| YieldRp0.2 | ≤ 555 (MPa) |
| TeileRm | ≤ 783 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 211 |
ASTM A675/A675M Grade 345 Material Thermal Properties
The thermal performance parameters of the ASTM A675/A675M Grade 345 steel are as follows:
| Temperature (°C) | 23 | 314 | 238 |
| Modulus of elasticity (GPa) | - | 263 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 231 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 343 |
| Poisson’s coefficient, ν | - | - | 222 |