ASTM A533/A533M A533 Grade A Class 2 Introduce
There are nine grades of ASTM A533/A533M steel plate, namely: A533 GRADE A, A533 GRADE B, A533 GRADE C, A533 GRADE D, A533 GRADE E, A533 GRADE F, A533 GRADE H, A533 GRADE J, and A533 GRADE K. Each grade can only be used in the specific pressure vessel service environment.
Smelting temperature:1223°C - 1323°C
Application:Pressure vessel plates, alloy steel, quenched and tempered, manganese, molybdenum and manganese molybdenum nickel
ASTM A533/A533M A533 Grade A Class 2 Material Chemical Composition
The chemical composition of the ASTM A533/A533M A533 Grade A Class 2 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | 0.4500 | 0.6000 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | - | 0.0350 |
| Manganese (Mn) | 1.1500 | 1.5000 |
| Silicon (Si) | 0.1500 | 0.4000 |
| Carbon (C) | - | 0.2500 |
| Silicon (Si) | 0.1300 | 0.4500 |
| Sulfur (S) | - | 0.0250 |
| PhOsphorus (P) | - | 0.0250 |
| Molybdenum (Mo) | 0.4100 | 0.6400 |
| Manganese (Mn) | 1.0700 | 1.5000 |
ASTM A533/A533M A533 Grade A Class 2 Material Mechanical Properties
ASTM A533/A533M A533 Grade A Class 2 steel has excellent corrosion resistance due to its high chromium, molybdenum, and nitrogen content. The steel is also resistant to oxidation and wear, as well as to high-temperature corrosion. ASTM A533/A533M A533 Grade A Class 2 steel has excellent resistance to atmospheric corrosion, especially in marine and industrial environments, and it can also be used in areas with high concentrations of acid or alkaline solutions.
The mechanical properties of the ASTM A533/A533M A533 Grade A Class 2 steel are as follows:
| YieldRp0.2 | ≤ 483 (MPa) |
| TeileRm | ≤ 348 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 44% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 321 |
ASTM A533/A533M A533 Grade A Class 2 Material Thermal Properties
The thermal performance parameters of the ASTM A533/A533M A533 Grade A Class 2 steel are as follows:
| Temperature (°C) | 42 | 999 | 181 |
| Modulus of elasticity (GPa) | - | 727 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 313 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 243 |
| Poisson’s coefficient, ν | - | - | 133 |
ASTM A533/A533M A533 Grade A Class 2 Material Machining Technology
The machinability of ASTM A533/A533M A533 Grade A Class 2 steel is considerably dependent on its composition. Generally, this type of steel can be machined with good results. It can be machined with relative ease using conventional cutting tools, and its machinability can be enhanced by proper selection of tooling and machining parameters. When machining ASTM A533/A533M A533 Grade A Class 2 steel, it is best to use high-speed steel tools that are specifically designed for steels with similar compositions. This will help to ensure that the resulting cuts are clean and accurate.