[ product performance ] Toughness> 4.0; hardness value 45-55; major chemical composition: 2.0 < C < 3.0; 1.5 〈 Cr < 3.0; 0.5 < Mn < 1.5; 0.1 < S; wearability good( the 2 times of the ball of forged steel); broken rate low ( smaller than 1%); sexual price than is profession high . [ apply ] mine and power , build material. [ typical user ] copper mine of dexin... [ quality system ] with ISO900 1: 2000 quality systems is standard.

[ product performance ] Toughness> 5.0; hardness value 60-65; [major chemical composition]: 2.8<C<3.8；1.5<Mn<2.2；15<Cr<26;0.3<Si<1.0；p<0.08; [ product use ] packing, sheath, fender, bearing and the impeller of the casting dregs pump, grey dregs pump, mud pump and river sand pump of thick liquid case and various hammers first, special drum liner etc.. [ typical user ]copper mine of yongpin...[ quality system ] with ISO900 1: 2000 quality systems is standard.

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