Drill String Cross-over Sub uses AISI4145H chromium-molybdenum steel, execute API specification.We can produce the same-dia type, reducers type and L-type three types, the screw can be cold thread rolling, copper or phosphate treatment.
KUNFENGs Co., Ltd is a big complex combined steel stockist. We have a large of GB4237 0Cr18Ni11Nb Austenitic stainless steel plate with different sizes to meet the customer requirements. And GB4237 0Cr18Ni11Nb Austenitic stainless stee
If you are buyers of DIN 17102 WStE380 carbon and low alloy steel plate, KUNFENG is your good partner. KUNFENG is professional supplier of DIN 17102 WStE380 carbon and low alloy steel plate.
KUNFENG has rich experience in supplying GB/T 3077 35CrMo steel plate. GB/T 3077 35CrMo steel plate is the specification number of alloy structural steel (alloy quenched and tempered steel). GB/T 3077 35CrMo Steel Alloy Structural Steel plate can be stock