The residual sulfur content and carbon content in these steels are often not controlled during production, and the material cannot be traced back to the source, even in material recycling. If Cr-Mn steels are not specified, they will become a dangerous scrap mixed raw material, leading to castings containing unexpectedly high levels of manganese.

castings containing cold coil
Material Grade	Chemical Composition %
C	Mn	P	S	Alta
SPCC	≤0.12	≤0.50	≤0.035	≤0.025	≥0.020
SPCD	≤0.10	≤0.45	≤0.030	≤0.025	≥0.020
SPCE	≤0.08	≤0.40	≤0.025	≤0.020	≥0.020
for all steel grades,when C≤0.01,Alt≥0.015