Explanation

Weld carbon equivalent: weld carbon equivalent refers to the effect of relevant alloy elements on weld performance of steel product equivalent to the effect of carbon content, which is usually used to evaluate weld performance of steel product. In low-cardon steel and low alloy steel, the commonly used calculation formula of weld carbon equivalent is: C_ Eq (%)=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15. The higher the value of carbon equivalent, the greater the hardening tendency of steel product, and thus the risk of weld cracks during weld is also increased. The calculation of carbon equivalent can be used to predict weld performance and decide whether preheating or other appropriate process measures are required to ensure the smooth progress of weld process. cast iron carbon equivalent: cast iron carbon equivalent is equivalent to the influence of relevant alloy elements on iron carbon eutectic composition as the influence of carbon content to evaluate the flow ability and foundry process performance of cast iron. For cast iron with low alloy element content, the common formula for calculating carbon equivalent is: CE (%)=C+(Si+P)/3. When carbon equivalent is close to eutectic carbon content, molten iron has the best flow ability.

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