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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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Standard | JIS G 3429 Seamless Steel Tubes for Automotive Steel Tubes |
Key Word | High Pressure Gas Cylinder Tube |
Material | STH11 STH12 STH21 STH 22 STH31 Manganese,Chrome-molybdenum ,Nickel-molybdenum |
Size | OD: 5-420mm; WT: 0.5-50mm; Length: max12000mm |
Technique | Cold Drawn Seamless |
Application | For Automotive Steel Tubes |
Manufacturing | The tubes are manufactured by a seamless process |
Delivery condition | Hot Finished ,Cold Finished |
Chemical Requirement
Steel Grade | Class | C | Si | Mn | P | S | Ni | Cr | Mo |
STH11 | Manganese Steel tube | 0.50max | 0.10-0.35 | 1.80max | 0.035max | 0.035max | - | - | - |
STH12 | 0.30-0.41 | 0.10-0.35 | 1.35-1.70 | 0.030max | 0.030max | - | - | - | |
STH21 | Chrome-molybdenum steel tube | 0.25-0.35 | 0.15-0.35 | 0.40-0.90 | 0.030max | 0.030max | 0.25max | 0.80-1.20 | 0.15-0.30 |
STH22 | 0.33-0.38 | 0.15-0.35 | 0.40-0.90 | 0.030max | 0.030max | 0.25max | 0.80-1.20 | 0.15-0.30 | |
STH31 | Nickel-molybdenum Steel tube | 0.35-0.40 | 0.10-0.50 | 1.20-1.50 | 0.030max | 0.030max | 0.50-1.00 | 0.30-0.60 | 0.15-0.25 |
Dimensional Tolerances
OD% | WT% | Tolerance Allowance % | L |
±1 | ＋30 0 | 20 max | ＋30 mm |
Note: the tolerance is not available for WT＜5.6mm tubes | |||
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, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring
Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield
Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a
perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate
longitudinal and transversal defects.
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and
solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is
30-60 days if the goods are not in stock, it is according to
quantity.
Q: Do you provide samples of carbon seamless steel tube ? is it
free or extra ?
A: Yes, we could offer the sample for free charge but need pay the
cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30%
T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
