ASTM A131/A131M Grade A Introduce
The main advantages of using ASTM A131/A131M Grade A are its protection against corrosion, its ductility, and its ability to resist high temperatures. This steel can resist corrosion in saltwater environments, and it is therefore suitable for naval vessels and boats operating in these areas. It also performs well in low temperatures, and is therefore also suitable for applications in cold regions. The steel has excellent weldability, making it easy to attach to other materials, and it is also highly ductile, allowing it to be deformed and bent without losing its structural integrity.
Smelting temperature:1373°C - 1769°C
Application:Structural steel for seagoing
ASTM A131/A131M Grade A Material Chemical Composition
The chemical composition of the ASTM A131/A131M Grade A steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.5000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | - | 0.0200 |
| Molybdenum (Mo) | - | 0.0200 |
| Copper (Cu) | - | 0.0200 |
| Chromium (Cr) | - | 0.0200 |
| (C+Mn/6) | - | 0.4000 |
| Carbon (C) | - | 0.2100 |
| Aluminum (Al) | 0.0150 | - |
ASTM A131/A131M Grade A Material Mechanical Properties
ASTM A131/A131M Grade A steel is a low carbon alloy steel, and it has several unique mechanical properties that make it an ideal material for use in shipbuilding. This type of steel is known for its strength, durability, and corrosion resistance. It is also resistant to impact and vibration, making it highly resistant to damage.
The mechanical properties of the ASTM A131/A131M Grade A steel are as follows:
| YieldRp0.2 | ≤ 638 (MPa) |
| TeileRm | ≤ 495 (MPa) |
| ImpactKV/Ku | 41(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 333 |
ASTM A131/A131M Grade A Material Thermal Properties
The thermal performance parameters of the ASTM A131/A131M Grade A steel are as follows:
| Temperature (°C) | 13 | 439 | 761 |
| Modulus of elasticity (GPa) | - | 454 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 342 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 142 |
| Poisson’s coefficient, ν | - | - | 334 |
ASTM A131/A131M Grade A Material Machining Technology
Drilling is another common operation used to form small holes in ASTM A131/A131M Grade A steel. A range of drill bits, such as twist drills, countersinks, and reamers can be used for this type of operation. Again, it is important to use the right type of cutting tool when drilling ASTM A131/A131M Grade A steel.