Skip to content
888-828-7897
LOCATIONS
LOCATIONS
  • There are no suggestions because the search field is empty.
Grade A633 1 in. x 96 in. x 240 in. steel plate front view.
Grade A633 1 in. x 96 in. x 240 in. steel plate right view.
Grade A633 1 in. x 96 in. x 240 in. steel plate top view.

ASTM A633 Structural Steel Plate

Leeco® Steel stocks and supplies ASTM A633, a normalized high-strength low-alloy structural steel plate designed for applications that require improved notch toughness at low ambient temperatures.
BUILD A QUOTE

Features

  • Normalized high-strength structural steel grade ideal for welding, riveting or bolting.

  • Available in four grades: A, C, D and E.

  • Provides improved notch toughness at low ambient temperatures compared to as-rolled materials of similar strength.

  • Charpy test requirements for specific zones and climates may be requested.

  • May be multi-certified to certain API or ABS specifications on mill test reports, but guaranteed to be certified to meet ASTM A633 standards.

Build Your Quote

Use our quote builder to configure your steel plates by selecting the material, size, thickness, quantity, and any custom requirements for fast, accurate pricing.

Start Now

Product Details

Grade Thickness Width Length
A633-A 1/4" – 6" 48" – 120" Up to 480"
A633-C 1/4" – 6" 48" – 120" Up to 480"
A633-D 1/4" – 6" 48" – 120" Up to 480"
A633-E 1/4" – 6" 48" – 120" Up to 480"
Grade Yield Point (ksi) Tensile Strength (ksi) Min. 8” Elongation %
A 42 63-83 18
C & D ≤2.5” thick 50 70-90 18
C & D >2.5" to ≤4" thick 46 65-85 18
E ≤4" thick 60 80-100 18
E >4" to ≤6" thick 55 75-95 18
Carbon max 0.18%
Manganese 1.00-1.35%
Phosphorus max 0.030%
Sulfur max 0.030%
Silicon 0.15-0.50%
Columbium max 0.05%
Carbon max 0.20%
Manganese 1.15-1.50%
Phosphorus max 0.030%
Sulfur max 0.030%
Silicon 0.15-0.50%
Columbium 0.01-0.05%
Carbon max 0.20%
Manganese, ≤1 1/2" thick 0.70-1.35%
Manganese, Over 1 1/2" to & incl 4" thick 1.00-1.60%
Phosphorus max 0.030%
Sulfur max 0.030%
Silicon 0.15-0.50%
Copper max 0.35%
Chromium max 0.25%
Nickel max 0.25%
Molybdenum max 0.08%
Carbon max 0.22%
Manganese 1.15-1.50%
Phosphorus max 0.030%
Sulfur max 0.030%
Silicon 0.15-0.50%
Vanadium 0.04-0.11%
Nitrogen max 0.030%

Grade Comparison

Frequently Asked Questions

Learn more about A633 steel plate.
ASTM A633 is a normalized high-strength low-alloy structural steel plate used for welded, riveted or bolted construction. It is especially suited for low ambient temperatures of -50°F (-45°C) and higher, where improved notch toughness is needed compared to as-rolled steel plate of similar strength.
Normalized steel plate is steel that is heat-treated to refine the grain structure and support more consistent mechanical properties. For ASTM A633, normalization helps improve notch toughness, making the steel useful in structural applications where low ambient temperature performance matters.
Charpy impact testing is not automatically required for every ASTM A633 steel plate order, but it may be requested when a project requires verified impact toughness for specific zones, climates or service conditions. If Charpy testing is required, the testing requirements should be specified when the plate is ordered.
ASTM A633 is supplied in the normalized condition, while as-rolled steel plate is supplied after rolling without the same normalizing heat treatment. ASTM A633 is normalized to support more consistent toughness performance in low-temperature structural applications.