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.
GB/T 1220 2Cr13 stainless steel belongs to the martensitic steel. Among various stainless steel, 2Cr13 has high cost performance. So GB/T 1220 2Cr13 is widely used in the industrial field.
DIN17100 St52-3 & St52-3+N Steel machining parts have high strength and good toughness; St52-3 & St52-3+N Steel Work are Easy for molding process and good welds ability.