Product Name: DIN 2391 St52 NBK Seamless Steel Tube
Material: St35, St45, St52
Application: For Auto use, machinery use, Motorcycle shock reducer steel tubes, Auto shock reducer inner cylinder, etc.
Size: O. D.: 6-88mm W. T.: 1-15mm Length: Max 11800mm
Delivery condition: BK, BKW, BKS, GBK, NBK

Stable Quality with Competitive Price.
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 and 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 labes 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.

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