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.
ASTM A572 Gr.50 Steel machining parts cutting method: A572 Gr.50 will be cut with plasma, oxy-Acetylene, Laser cutting, and water jet, as well as with abrasive cut off saws.
RMRS Grade A shipbuilding steel plates also can be used for ship repairing, the offshore oil drilling platform, the platform pipe joints and other components.
KUNFENG supplies the ASME SA709 Gr 50 carbon and low alloy steel plate over ten years. With the economic development, the steel market is constantly expanding.