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:

ElementMinMax
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/Ku41(J)
ElongationA31%
Reduction in cross section on fractureZ13%
As-Heat-Treated ConditionSolution 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)13439761
Modulus of elasticity (GPa)-454-
Mean coefficient of thermal expaion ×10-6/(°C)--34
Thermal conductivity (W/m·°C)-22.341.2
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.