ASTM A675/A675M Grade 70 Introduce
ASTM A675/A675M Grade 70 is an alloy titanium steel renowned for its excellent mechanical properties. It has a high strength, good impact resistance, excellent corrosion resistance, good weldability and machinability, and a good fatigue strength. Its low magnetic permeability also helps to improve its corrosion and impact resistance. This steel is suitable for a variety of industrial and mechanical applications, making it an ideal choice for many industries.
Smelting temperature:1511°C - 1321°C
Application:Mechanical properties of special hot rolled carbon steel rods
ASTM A675/A675M Grade 70 Material Chemical Composition
The chemical composition of the ASTM A675/A675M Grade 70 steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0500 |
| Copper (Cu) | 0.2000 | - |
| Copper (Cu) | 0.2000 | - |
ASTM A675/A675M Grade 70 Material Mechanical Properties
The mechanical properties of the ASTM A675/A675M Grade 70 steel are as follows:
| YieldRp0.2 | ≤ 146 (MPa) |
| TeileRm | ≤ 252 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 314 |
ASTM A675/A675M Grade 70 Material Thermal Properties
The thermal performance parameters of the ASTM A675/A675M Grade 70 steel are as follows:
| Temperature (°C) | 33 | 412 | 268 |
| Modulus of elasticity (GPa) | - | 626 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 331 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 243 |
| Poisson’s coefficient, ν | - | - | 344 |