... , rolling and colling . Hot rolled steel sheets and strips : Which steel type include carbon steel,low alloyed steel, high strength steel and corrugated steel with lath and lentilform ... 20 and 30.. The performance of this steel.1: Carbon steel : Type Symbol :SS330,SS400,Q195,Q235,ZJ330B,ZJ400B,20,30,SPHC,SPHD,SPHE2 ...