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.
KUNFENG is the supplier of JISG4304/4312 SUS309 stainless steel plate. and JIS G4304 SUS309 stainless steel plate is our main steel. JIS G4304 SUS309S stainless steel plate has a long story in supplying JISG4304/4312 SUS309 stainless steel plate.
KUNFENG is one of the largest stockist in China, we have a large of JISG4304 SUS 321 AUSTENITIC steel plate/coil in stock. Because JISG4304 SUS 321 AUSTENITIC steel plate/coil is more and more popular in our life. Lots of old customers are willing to buy
ASTM A387 GRADE 9 steel work/steel structure/steel spare parts can be used to build gas holder, waste gas cleaning tower, please send us inquiry If you need.