... 201,202,301,304,316,304L,316L,430. 7.SurfaceTreatment:180grit,240grit,320grit,400grit,600grit,Satin,Brushed, ... anti-wearing, good-appearance, excellent mechanical properties. 10.Product Size: Round pipe:O.D.:9.5,12 ... .7,15.9,17,18,19.1,20,21 ... Length:3000mm to 6000mm. Square pipe:Side length:10*10,12*12,15*15,18*18,19*19, ... .045≤0.045Mn8.5-10.57.5-10≤2.0≤2.0≤2.0≤1.0≤2.0≤2.0Si≤1.0≤1. ...