Popular ASTM A572 Grade 50 low alloy steel’s Alloying elements

If it is necessary to increase the corrosion resistance, add copper to the A572 Grade 50 steel. In addition to chromium and nickel, manganese, silicon, chromium and nickel elements can increase the strength limit, slightly change the plasticity and reduce the impact toughness.

The future effort of ASTM A572 Class 50 low alloy steel metallurgists will be to develop steels with high strength, good weldability and low temperature. By using a small amount of boron, molybdenum, vanadium, niobium, titanium and other elements, a new type of steel can be produced by a single ratio of single alloying or multi-component alloying.


ASTM A572 Grade 50 low alloy steel has a nickel content of no more than 1%. This element does not significantly improve steel, but has a good effect on plasticity and impact toughness, which can improve the brittle fracture resistance of steel. The nickel content is usually limited by its scarcity.

Usually 0.3% copper is added to A572 grade 50 low alloy steel. At this level, copper can improve corrosion resistance and improve strength properties. In addition, this copper content has no adverse effect on weldability.


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