1.GB1499-1998/BS4449 2.certificate: CE ISO9001:2008 3.confirmed time of delivery 4.excellent quality & competitive price Chinese Standard:16Mn,20Mn,30Mn2,30Mn5,40Cr,Q345D,Q345E,Q390;42CrMo,20CrMo,38CrMoAl,40CrNiMo;48CrMo,5CrNiMo;Japanese Standard:SCM415,SCM420,SCM440,SNCM439,SNCM220; SACM645USA Standard:SAE4140,SAE4130,SAE9840,SAE4340,AISI4145H,SAE4150,SAE8620,European Standard:42CrMo4,25CrMo4, ...