The size is from #100 to #700 according to Chinese,Japanese, American and British standards.
Steel Grade:Q235(A,B,C,D); Q345(A,B,C,D);
SS400; SM400B,SM490B,SM490YB;
ASTM A36,ASTM A572(Gr 50); 50B,50C, ASTM A516 Gr70.