TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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Din2391 Seamless Precision Steel Tube For Mechanical / Automotive Engineering
Torich supply precision steel tubes size from OD 4 mm to OD80 mm, Wall thickness from WT 0.5 mm to WT 10 mm, Length max 12m,
Could Cut to length for your special requests.Material ST 35,St45,St52 St30Al,St 30Si,Other materials upon agreement with customers.
Standard: DIN2391
Size Range: OD: 4-80mm, WT: 0.5-10mm, Length: 1-12m
Steel Grade: 10#, 20#, 16Mn, ST35, St45, St52
Chemical Compositions
| Grade | C max | Si max | Mn | P max | S max |
| ST35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST52 | 0.22 | 0.35 | ≥1.60 | 0.025 | 0.025 |
Mechanical properties
| Grade | Condition | Tensile Point(Mpa) | Yield Point(Mpa) | Enlongation |
| ST35 | BK | ≥440 | ≥6% | |
| BKW | ≥370 | ≥10% | ||
| GBK | ≥315 | ≥25% | ||
| NBK | 340-470 | 235 | ≥25% | |
| ST45 | BK | ≥540 | ≥5% | |
| BKW | ≥470 | ≥8% | ||
| GBK | ≥390 | ≥21% | ||
| NBK | 440-570 | 255 | ≥21% | |
| ST52 | BK | ≥590 | ≥5% | |
| BKW | ≥540 | ≥7% | ||
| GBK | ≥490 | ≥22% | ||
| NBK | 490-630 | 355 | ≥22% |
1.Production method:
Cold Drawn on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance
2.Features:
Smooth inner and outer surfaces, Available in a variety of outer diameter sizes
Good raw material quality, Narrow tolerance
3.Deliver condition:
1). BK Cold finished (hard)
2). BKW Cold finished (soft)
3). BKS Cold finished and stress relieved
4). GBK Annealed
5). NBK Normalized
4.Relative standard:
DIN2391 Precision Seamless Steel tubes for precision hydraulic systems
DIN2393 Precision Welded Steel tubes for precision hydraulic systems
Product Pictures of Din2391 Seamless Precision Steel Tube
Packing & Delivery
Packing Details : In bundles or in wooden boxes packaging
1.Coated by antirust oil.
2.Sheathed by paper carton tube, both end covered by roundness paper carton.
3. Cotton rope twined and bundled without interspace, to avoid any surfaced scratched.
4. Plastic film covered overall of bundled bars, to keep seal.
5. (Options) Woven tarpaulin covered overall of bundled bars, to keep packing clear.
6. Lifting belts on the middle of bundled bars.
7. (Options) Wooden box packed.
Our Certifications
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
FAQ
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 ? 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
Q: Stock is available ?
A: Some regual sizes of precision steel tubes is available with stock,Usually produce according to the order
Precision Steel Tube Cold Drawn Carbon Seamless Steel Pipe DIN2391 St35 St45 St37.0 St37.4 St52.0 St30Si