Details about ASTM A633/A633M Grade A Carbon and Low-alloy High-strength Steel Coil

Chemical Composition and Mechanical Properties of ASTM A633 Grade A Steel

ASTM A633 Grade A is a normalized high-strength low-alloy structural steel with the following properties:

Property Value
Yield Strength (min) 290 MPa (42 ksi)
Tensile Strength 430-570 MPa (62-83 ksi)
Elongation in 8″ (min) 20%

Chemical Composition:

Element Percentage
Carbon (max) 0.18%
Manganese 1.00-1.35%
Silicon 0.15-0.50%
Phosphorus (max) 0.035%
Sulfur (max) 0.04%

Applications and Uses of ASTM A633 Grade A in Industry

ASTM A633 Grade A steel is commonly used in:

  1. Welded, riveted, or bolted construction
  2. Low-temperature applications (-50°F/-45°C and higher)
  3. Storage tanks
  4. Low-pressure vessels
  5. Temperature-controlled vessels
  6. Heat exchangers
  7. Pressure vessels and boilers

Manufacturing Process and Available Dimensions

ASTM A633 Grade A is normalized by heat treatment to achieve a fine austenitic grain size. Available dimensions include:

Thickness (mm) Width (mm) Length (mm)
6 – 100 1500 – 4050 3000 – 15000

Welding and Fabrication Considerations

ASTM A633 Grade A has excellent weldability. It is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.

Comparison of Grade A with Other ASTM A633 Grades

Grade Yield Strength (min MPa) Tensile Strength (MPa)
A 290 430-570
C 345 (up to 65 mm thickness) 485-620
D 345 (up to 65 mm thickness) 485-620
E 415 (up to 100 mm thickness) 550-690

Cost-Effectiveness and Performance Benefits

ASTM A633 Grade A offers improved notch toughness compared to as-rolled materials of similar strength, making it suitable for low-temperature applications. Its normalized structure provides consistent properties throughout the material.

At HL Steel Company, we offer high-quality ASTM A633 Grade A steel coils tailored for various industrial applications, ensuring optimal performance and cost-effectiveness for your projects.

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