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E235 E255 E355 Cold Drawing Tube , SAE1010 SAE1020 Seamless Carbon Steel Tube Quick Detail: ST37.4 hydraulic oil tubing DIN2391 NBK OD6XTH1.2No oxidization with NBK heat treatmentInternal surface with high cleanessno crack with bending and deformation. Description: Synopsis of Process Routing: quality carbon steel — cold drawn — heat treatment without oxidization (NBK status) — nondestructive testing. In the wall honing and inside flushing under the high pressure — .Antirust oiling outside surface — plastic capping on both ends. Production process control: We use the domestic first-class drawing machine,the production process is controlled with alloy internal and external matrix to control product dimensions, through the first, middle and last process inspection to ensure product quality. Applications: High pressure fuel injecting tube for diesel engine,automotive hydraulic system. Specifications: Standard:ISO8535-1/DIN2391/C/EN10305-4 /SAEJ524Material:ST35,ST37.4,ST37,ST45,ST52,ST52.4,E235,E255,E355,SAE1010,SAE1020Delivery State:NBK/GBK.
