... 42CrMo4,BS970 709M40,34CrNiMo6,BS970 826M40 We Shanghai ZENT Industrial Co., Ltd was established in 2006, situates in the ... , material preparation, machining, and heat treatment. Shanghai ZENT Industrial Co., Ltd specializes in the free forging of carbon steel, ... the international market. Looking forward for your enquiries, any time!Best regards, China Special Alloy Shanghai ZENT Industrial Co.,LtdRoom ...