ASTM A515/A515M A515 Grade 70 [485] Introduce
ASTM A515/A515M, the American Society for Testing and Materials (ASTM) standard for Pressure Vessel Plates, is a standard that covers carbon-silicon steel plates primarily used for intermediate- and higher-temperature service in welded boilers and other pressure vessels. The A515/A515M specification covers carbon-silicon steel plates primarily for intermediate- and higher-temperature service in welded boilers and other pressure vessels.
Smelting temperature:1997°C - 1327°C
Application:Medium and high temperature pressure vessel plate, carbon steel
ASTM A515/A515M A515 Grade 70 [485] Material Chemical Composition
The chemical composition of the ASTM A515/A515M A515 Grade 70 [485] steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.4000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Manganese (Mn) | - | 1.2000 |
| Carbon (C) | - | 0.3100 |
ASTM A515/A515M A515 Grade 70 [485] Material Mechanical Properties
The chemical composition of ASTM A515/A515M A515 Grade 70 [485] steel lends itself to exceptionally high levels of hardness and strength. The combination of carbon, manganese, and phosphorus provides reinforcement against tensional loads and helps resist deformation, making it an excellent choice for heavy-duty applications. Grade 75 steel is particularly well suited for high-pressure applications due to its outstanding hardness.
The mechanical properties of the ASTM A515/A515M A515 Grade 70 [485] steel are as follows:
| YieldRp0.2 | ≤ 418 (MPa) |
| TeileRm | ≤ 836 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 434 |
ASTM A515/A515M A515 Grade 70 [485] Material Thermal Properties
The thermal performance parameters of the ASTM A515/A515M A515 Grade 70 [485] steel are as follows:
| Temperature (°C) | 24 | 666 | 748 |
| Modulus of elasticity (GPa) | - | 663 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 331 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 443 |
| Poisson’s coefficient, ν | - | - | 144 |
ASTM A515/A515M A515 Grade 70 [485] Material Machining Technology
Due to the high strength of ASTM A515/A515M A515 Grade 70 [485] steel, the machining of this material must be done with precision and accuracy. As such, it requires the use of certain tools and methods in order to achieve the desired size, shape, and finish of the finished product. As with machining any material, the speed and performance of the process should also be taken into consideration.