Product Name: DIN2391 St52 NBK Automotive Cold Drawn Seamless Steel Tube for Drag Link Material: ST35, ST45, ST52 Size Range: OD: 6-88mm, WT: 1-15mm, Length: 5.8m/6m, maximal 11.8m Delivery Condition: BK, BKW, BKS, GBK, NBK Application: For high precision purpose, auto industry, like manipulator, Shock Absorber, Transmission Shaft, Steering Gear, Car Frame, etc.
Cold Drawn on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance NBK(Bright Annealing) Heat Treatment, Surface is clean and smooth, without oxide scale Good Extending and Bending Ability.
Quality Control: 1. Incoming Raw Material Inspection 2. Raw Material Segregation to avoid steel grade mix-up 3. Heating and Hammering End for Cold Drawing 4. Cold Drawing or Cold Rolling, On line inspection 5. Heat Treatment:BKS, GBK, NBK 6. Straightening/Cutting to specified length/Finished Measuring Inspection 7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc. 8. Packing and Stocking.
100% Eddy Current Testing. 100% Size Tolerance Checking. 100% Tube surface checking to avoid surface defects.
DIN2391 Seamless Cold Drawn Precision Steel Tube
ST35, St45, ST52
BK, BKW, BKS, GBK, NBK
OD: 6-88mm, WT: 1-15mm
High precision purpose, auto parts, oil cylinder, etc
Bao Steel, Xingcheng Steel, Huai Steel, Zhongtian Steel