ASTM A131 Shipbuilding Steel Plate Grade AH36

ASTM A131 Shipbuilding Steel Plate Grade AH36

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Description

Chemical Composition and Mechanical Properties of ASTM A131 Grade AH36

ASTM A131 Grade AH36 is a high-strength structural steel used primarily in shipbuilding. Its mechanical properties are as follows:

Property Value
Yield Strength (min) 51,000 psi (355 MPa)
Tensile Strength 71,000 – 90,000 psi (490-620 MPa)
Elongation (min) 22% in 2″, 19% in 8″

The chemical composition limits for AH36 include a maximum carbon content of 0.18% and a maximum manganese content of 0.90-1.60%.

Applications and Industries Using ASTM A131 Grade AH36 Steel

ASTM A131 Grade AH36 is widely used in:

  1. Shipbuilding industry
  2. Offshore structures
  3. Marine engineering
  4. Structural ship parts
  5. Barges and marine equipment

Its high strength and excellent corrosion resistance make it ideal for these applications.

Manufacturing Process and Available Forms

ASTM A131 Grade AH36 is typically manufactured as plate steel. Available dimensions include:

  • Thickness: 0.251″ – 2.00″ (6.38 – 50.8 mm)
  • Width: 72″ – 129.9″ (1800 – 3299 mm)
  • Length: 240″ – 1020″ (6100 – 25910 mm)

The steel is offered in the control-rolled condition.

Comparison of ASTM A131 Grade AH36 with Other Grades

Grade Yield Strength (min) Tensile Strength Charpy V-Notch Test
AH36 51,000 psi (355 MPa) 71,000 – 90,000 psi 25 ft-lbs @ 32°F
DH36 51,000 psi (355 MPa) 71,000 – 90,000 psi 25 ft-lbs @ -4°F
EH36 51,000 psi (355 MPa) 71,000 – 90,000 psi 25 ft-lbs @ -40°F

AH36 offers a balance of strength and toughness suitable for most shipbuilding applications.

Quality Standards and Testing for ASTM A131 Grade AH36

ASTM A131 Grade AH36 undergoes rigorous testing to meet industry standards:

  1. Tensile strength testing
  2. Chemical composition analysis
  3. Charpy V-notch impact testing (25 ft-lbs @ 32°F)
  4. Ultrasonic testing for internal defects

At HL Steel Company, we ensure that all our ASTM A131 Grade AH36 steel meets or exceeds these quality standards, providing our customers with reliable and high-performance products for their shipbuilding and marine engineering needs.

 

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