Chemical Composition and Mechanical Properties of ASTM A131 Grade A

ASTM A131 Grade A is an ordinary-strength structural steel with the following properties:Chemical Composition:

Mechanical Properties:

Applications of ASTM A131 Grade A in Shipbuilding

Grade A steel is commonly used in:

1. General commercial vessels
2. Light marine structural constructions
3. Plates, frames, and beams for shipbuilding
4. Components requiring moderate strength and durability

Manufacturing Process and Available Dimensions

Grade A steel is typically manufactured as plate steel. Available dimensions include:

• Thickness: 0.1875″ – 3.00″ (4.762 – 76.2 mm)
• Width: 72″ – 129.9″ (1800 – 3299 mm)
• Length: 240″ – 1020″ (6100 – 25910 mm)

Comparison of Grade A with Other ASTM A131 Grades

Grade A offers good strength and toughness at room temperature, making it suitable for general shipbuilding applications.

Quality Standards and Testing for ASTM A131 Grade A

Grade A undergoes rigorous testing, including:

1. Tensile strength testing
2. Chemical composition analysis
3. Charpy V-notch impact testing (25 ft-lbs @ 68°F for plates 2.001″ – 2.805″ thick)
4. Ultrasonic testing for internal defects

At HL Steel Company, we ensure that all our ASTM A131 Grade A steel meets or exceeds these quality standards, providing our customers with reliable and high-performance products for their shipbuilding needs.