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.
With the rapid development of our economy, the demand of GB4237 0Cr17Ni12Mo2 Austenitic stainless steel plate is increasing. And KUNFENG has the high-quality GB4237 0Cr17Ni12Mo2 Austenitic stainless steel plate with a large stock.
KUNFENG Steel offers a wide range of advanced and standard aluminum machining services for aluminum products. We specialize in customized machining services to