This is Red machinery equipment Co., Ltd, a professional supplier in oil&gas industry, our products refers to Raw Material, Semi-finished products, finished products in this field, as surface wellhead and flow control products manufacturer. Hereafter are some information of our forgings: Metrail: AISI 4130, 4330V，4140, 4145H, 4340, 410SS, 420SS, A106, 17-4PH, 15-5PH，13-8PH，304, 304L，316L etc Standard: API, AISI, ASTM Yield Strenth: 60K-105K UT standard: A388 Delivery condition: Heat treated(Q+T/NQT), rough turning Dimension tolerance: OD:0~+2 ID:-1~0 Length:0~+5 All the orders will be carried out with tracking report. All of our products can be trailed to its original source by its exclusive No. in inspection certificates. All the project can be inspected by third party inspection. Until now, our forgings are exported to U.A.E., U.S.A, Singapore, Argentina, Malaysia etc, and have gotten high approvement from clients, if you are interested in buying this kind of products from China, we should be good choice, for more information about us, please check in our website *****, you are always welcome to get in touch with us.