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

Chemical Composition and Mechanical Properties of ASTM A633 Grade C Steel

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

Property Value
Yield Strength (min) 345 MPa (50 ksi) for thickness ≤ 65 mm
Tensile Strength 485-620 MPa (70-90 ksi) for thickness ≤ 65 mm
Elongation in 8″ (min) 18%

Chemical Composition:

Element Percentage
Carbon (max) 0.20%
Manganese 1.15-1.50%
Silicon 0.15-0.50%
Phosphorus (max) 0.035%
Sulfur (max) 0.04%
Niobium 0.01-0.05%

Applications and Uses of ASTM A633 Grade C in Industry

ASTM A633 Grade C steel is commonly used in:

  1. Utility pole base plates
  2. Offshore oil and gas platforms
  3. Construction equipment frames
  4. Electric shovel dipper handles
  5. Suspension components
  6. Storage tanks
  7. Low-pressure vessels
  8. Temperature-controlled vessels

Manufacturing Process and Available Dimensions

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

Thickness (mm) Width (mm) Length (mm)
9.52 – 76.2 1800 – 3120 6100 – 15200

Welding and Fabrication Considerations

ASTM A633 Grade C has excellent weldability. It is suitable for welded, riveted, or bolted construction. The material exhibits good cold forming characteristics, with recommended minimum inside bend radius and die width opening provided for different bending orientations.

Comparison of Grade C with Other ASTM A633 Grades

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

Cost-Effectiveness and Performance Benefits

ASTM A633 Grade C offers superior notch toughness performance at low ambient temperatures, making it suitable for applications requiring improved toughness compared to as-rolled materials of similar strength. Its normalized structure provides consistent properties throughout the material.

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

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