Table 1.

Chemical composition of S235 and SS304 steel.

Steel	wt% C	wt% Si	wt% Mn	wt% Ni	wt% S	wt% P	wt% Cr	wt% N	wt% Cu
S235	0.22	0.05	0.06	0.3	0.04	0.04	0.3	0.012	0.3
SS304	0.07	0.75	2	8–10.5	0.03	0.045	17.5–19.5	0.1	-