Trademark Chemical Composition max,% Trademark C Si Mn P S Cr Ni Cu Al B-B 0.005 0.01 0.12 0.009 0.006 0.01 0.01 0.02 0.03 B-C 0.002 0.01 0.03 0.005 0.005 0.01 0.01 0.01 0.01 Trademark C Si Mn P S Cu Al N B-D 0.003 0.004 0.05 0.01 0.01 0.025 0.0007 0.0028 B-E 0.002 0.001 0.085 0.013 0.0058 0.024 0.0019 0.0046. PE bag or wooden box.