TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Application | Precision Machinery |
| Outer diameter(round) | 30 - 625 mm |
| Thickness | 2 - 100 mm, |
| Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Standard | ASTM,DIN,GB,JIS,API |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Grade | 45#,20#,16Mn,10#,Q345 |
| Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe,cold drawn |
| Brand Name | TORICH |
| Model Number | DOM Steel Pipe |
| Certification | ISO9001 ISO 14001 TS16949 |
| Place of Origin | Zhejiang/CHina |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Application | Precision Machinery | Outer diameter(round) | 30 - 625 mm |
| Thickness | 2 - 100 mm, | Length | 6M or as requirement,As customer's require,8m,5.8m,2.5-8m |
| Standard | ASTM,DIN,GB,JIS,API | Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Grade | 45#,20#,16Mn,10#,Q345 | Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe,cold drawn |
| Brand Name | TORICH | Model Number | DOM Steel Pipe |
| Certification | ISO9001 ISO 14001 TS16949 | Place of Origin | Zhejiang/CHina |
| High Light | DOM steel pipe for precision machinery ，ERW cold drawn round tube ，precision steel tube with warranty | ||
This product—commonly referred to as DOM (Drawn Over Mandrel) tubing—is a high-strength, precision round tube manufactured using a combination of electric resistance welding (ERW) and cold drawing over a mandrel. It’s typically fabricated from mild carbon steel grades such as SAE 1020, 1026, and in some cases ST52.3.
Manufacturing Process: Starts with an ERW "mother tube"; post-weld, the tube is cold-drawn over a mandrel to refine dimensional accuracy, wall thickness, and surface finish.
Tolerance & Quality: This yields tight OD/ID control, uniform wall thickness, high concentricity, and weld integrity.
Dimension Ranges: Common inventory spans OD 3/16" to 14", with wall thicknesses roughly 0.028" to 0.625". Standard lengths often range between 17–24 ft, with cut‑to‑length options available.
Standards: Usually made to ASTM A513 Type 5 for mechanical tubing.
Here are typical chemical compositions for DOM tubing grades, including a comparable alloy (4130) for contrast:
| Grade | C (max) | Mn | P (max) | S (max) | Notes |
|---|---|---|---|---|---|
| 1020 | 0.17–0.23% | 0.30–0.60% | ≤ 0.035% | ≤ 0.035% | Standard mild steel |
| 1026 | 0.22–0.28% | 0.60–0.90% | ≤ 0.035% | ≤ 0.035% | Higher carbon & manganese |
| ST52.3 | — | — | — | — | Typical European structural grade; DOM uses this also |
| 4130 (Alloy) | 0.28–0.33% | 0.40–0.60% | ≤ 0.035% | ≤ 0.035% | Contains Cr, Mo; alloyed for higher performance |
Here are mechanical properties from DOM tubing specs and ASTM A513-T5 references:
| Grade / Spec | Yield Strength | Tensile Strength | Elongation (in 2") | Hardness |
|---|---|---|---|---|
| ASTM A513‑T5 DOM | ≈ 60,000 psi | ≈ 70,000 psi | ~15–20% | Rockwell B80 |
| Typical DOM (1020/1026/ST52.3) | High (cold-drawing enhances yield/tensile) | High enhanced by cold-draw process | Good machinability | Controlled hardness |
Superior weld integrity combined with cold drawing yields excellent dimensional precision, smooth interior and exterior surfaces, and uniform wall thickness.
Improved yield and tensile strength, along with good machinability and weldability, thanks to cold-drawn processing.
ASTM A513 Type 5 (Mechanical Tubing) is the most common standard applied to domestic DOM tubing production.
If produced in different markets, equivalents in EN, GOST, JIS or GB may apply, especially when using ST52.3 or other regional grades (not covered by the sources).
General Use: DOM tubing is ideal for machinery and precision engineering contexts thanks to its strength and precision.
Examples per Sector:
Automotive: Driver steering columns, hydraulic/hydraulic cylinder rods, suspension links.
Industrial Equipment & Construction: Machinery shafts, supporting rods, and load-bearing mechanisms.
General Engineering: Components requiring tight tolerances—like axles, shafts, pins, and linear motion parts—also benefit from DOM tubing. Features like excellent finish and structural performance reduce downstream machining or finishing costs.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
25000000-30000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Who We are ? -------A professional steel pipes materials inventor, manufacturer and solution providerTorich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the ... Who We are ? -------A professional steel pipes materials inventor, manufacturer and solution providerTorich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the ...
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