Cold Rolled/ Cold Drawing process on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance
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 Rolling, On line inspection
5. Heat Treatment:BKS
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.
40Cr / 41Cr4 / 5140 Seamless Steel Tube for Automotive Parts
40Cr / 41Cr4 / 5140
BK, BKW, BKS, GBK, NBK
DIN2391 / EN10305-1 / GB/T3639
OD: 6-88mm, WT: 1-15mm
High precision purpose, auto parts, oil cylinder, etc
Bao Steel, Xingcheng Steel, Huai Steel, Zhongtian Steel
Cold Rolled Steel Tube
TS16949, ISO 9001
Bundles or Wooden Boxes
Chemical Component: C: 0.37-0.44, Si: 0.17-0.37, Mn: 0.50-0.80, Cr: 0.80-1.10
Mechanical Property: According to Standard requirements.
1. Can you provide a sample to check the quality?
We can provide free sample with same or similar sizes for you to check tube quality. You need to in charge of Express costs.
2. How about your production capacity?
3. What are your terms of payment?
30%TT in advance, Balance to be paid before shipment.
4. Where is your factory?
Jiaxing city, 2 hours away from Shanghai.
5. How can I get the quotation A.S.A.P?
Please send us an inquiry with full details as following,quotation will sent to you A.S.A.P:
1). Tube Standard
2). Steel Grade 3). Tube Size and Size Tolerance
4). Tube length 5). Quantity 6). If any special requirements
6. How about the minimum order quantity?
Normally for one size above 1 ton.