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.
We keep 10000 tons ex-stock in our warehouse, so if you have any requirements about these kinds of steel, welcome to contact Shanghai KUNFENG sales team.
SAE1045 round bar is a high-strength carbon quenched and tempered steel,which has a certain degree of ductility and toughness, high strength, good machinability.