... BS970 709M40,34CrNiMo6,BS970 826M40 We Shanghai ZENT Industrial Co., Ltd was established in 2006, situates in the Yangtze ... & chemical testing centers for free forging, die forging, material preparation, machining, and heat treatment. Shanghai ZENT Industrial Co., Ltd specializes ... any time!Best regards, China Special Alloy Shanghai ZENT Industrial Co.,LtdRoom 2302,No.729. Pujian Road . Pudong .Shanghai ...