Chemistry composition:Gu:0.20 Mg:0.05 Mn:1.0-1.6 Fe:0.7 Si:0.6 Zn:0.1 Standards:1.6*5.5,2*3.5,2*5,2*5.5,2.2*4.3,2.5*4,2.5*4.5,2.5*6,2.5*8,2.6*6,3*4.5,3*5,3*6,3*8,3*10,3.2*6,3.2*10,3.5*4.5,3.5*6,3.8*6,3.8*10,4.5*8,4.95*4.35,5.85*4.3,6.5*15,6.5*20,6.5*25,6.5*30,6.5*60,6.5*90,7.24*4.3,7.5*10,8.2*6,9*15,9*50,9.5*15,9.5*20,9.5*25,9.5*30,9.5*60,9.5*57,9.5*90,10.3*15,10.3*40