DALIAN ZHAOHUA CONSTRUCTION AND MACHINERY CO.,LTD
Material 31SiMn2,; Casting, Heat Treatment, the hardness after Tempering HRC25.5-32.5; Large Stock; Warranty 2500 working hours.
Material 28CrMnMo; Casting, Heat Treatment, the hardness after Tempering HRC25.5-32.5; Large Stock; Warranty 2500 working hours.
Material：40Mn2；Product color: Black；Technology：Forging；large stock/multiple choice of packaging/fastly delivery；Warranty time:2500 hours/12months
