Steel ASTM A529 Grade 50 products

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Steel grade ASTM A529 Grade 50 characteristics

Steel grade ASTM A529 Grade 50 is high-strength carbon manganese steel for structural purposes that meets the requirements of ASTM A529/A 529M.

Classification: High-strength carbon manganese steel.

Products: plate steel, rolled and structural steel.


Chemical composition of ASTM A529 Grade 50 steel, %

С Si Mn S P Cu*
≤ 0.27 ≤ 0.40 ≤ 1.35 ≤ 0.05 ≤ 0.04 ≥ 0.20

* minimum copper content if alloying is specified when placing an order


Mechanical properties of ASTM A529 Grade 50 steel

Tensile strength, MPa Yield strength, MPa (min) Elongation (sample 200 mm),% (min
485-690 345 18



Japan SS400



Steel grade ASTM A529 Grade 50 is used in the manufacture of welded, riveted and bolted structures of increased strength.



ASTM A529 Grade 50 steel has limited weldability. Welding methods for ASTM A529 Grade 50 steel:

  • manual arc welding
  • manual argon arc welding
  • automatic submerged arc welding
  • mechanized consumable electrode welding in carbon dioxide
  • electroclad welding
  • contact welding

Heating and subsequent thermal treatment is recommended.  

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