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.
DNV Grade A shipbuilding steel plate is a kind of hot rolled general tensile strength steel. DNV steels come 4 grades in ordinary-strength steel for shipbuilding and DNV Grade A shipbuilding steel plate is the lowest one of them.
KUNFENG Steel offers a wide range of advanced and standard aluminum machining services for aluminum products. We specialize in customized machining services to