Jiangyin Zhengbang Tube-making Co., Ltd
black phosphated hydraulic tube
Product Information:
Process Description: High quality carbon steel, fine drawing, no oxidation of bright heat treatment (NBK status), non-destructive testing, pipe wall with special equipment for brushing and after high-pressure washing, anti-rust oil for rust on steel processing, at both ends sealed for dust treatment. 
Main features: high precision, finish is good, inside and outside the wall of steel after heat treatment without oxide layer, inner cleanliness is good, steel to withstand high pressure, cold-formed without deformation, flaring, flattening free from cracks, can make all kinds of complex deformation and mechanical processing . Steel Color: light gray with white. 
Main use: hydraulic pipe systems, automotive steel, the other pairs of steel precision, finish, cleanliness, mechanical properties have a high demand customers. 
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Jiangyin Zhengbang Tube-making Co., Ltd.)
Norm DIN2391 EN10305,High quality carbon steel St35,St37.4,St52,cold drawing,bright heattreatmentwithoutoxidization(NBKstatus),non-destructivetesting,cleaing,phosphating,anti-rust oil dipping.This precision seamless tube with high accuracy and brightness features.
Mechanical properties:These tubes can be bent at any angel and bear the impact of high pressure,cold bending,flaring,and tensile force without cracks and breaks,oxidized residual substances on either inner or outer surface of tubes.Additionally,blockage to pneumatic,hydraulic and oil routes shall never occur.the elongation rate and tensile strength are in high standard.
our products used in industries of engineering machinery,machine tools,hydraulic machinery,shipbuilding ,automobile,heavy duty automobile,special automobile,railway locomotive,heavy duty machine,compressor,diesel engine,die casting machine,compressor,power station and boiler equipment etc