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.
SAE1035 is high quality carbon structural steels, has good plastic and the appropriate strength, process performance is better, and good welding performance.
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.
KUNFENG has a long story on supplying ASME SA588Grade B(SA588GRB) Weather Resistant Steel Plate. KUNFENG have set up long relationship with many users of ASME SA588Grade B Steel Plates.