ASTM A830-1045 High-Carbon Steel Plate

Leeco® Steel stocks and supplies ASTM A830-1045 high-carbon steel plate throughout North America.


  • High-carbon steel plate with high strength and hardness properties.
  • Can be heat-treated.
  • Typically used in manufacturing of gears, axles, shafts and machine parts.
  • While not routinely tested for mechanical properties, these can be requested as-needed.


Available Sizes

Leeco Steel stocks the following standard sizes, but other sizes may be available for special orders.

A830-1045 1/4" – 3" 48" – 120" Up to 480"

Chemical Composition

The following composition properties are ASTM specifications for the A830 steel grade.

Carbon 0.43-0.50%
Manganese 0.60-0.90%
Phosphorus max 0.030%
Sulfur max 0.030%