TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C,T/T,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 60000tons per year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Material | Low-carbon and medium-carbon unalloyed steel for ERW and cold drawn DOM tube production |
| Standards | ASTM A513/A513M Type 5, EN 10305-2, SAE J525, JIS G 3445, GOST 10707, GB/T 24187, GB/T 13793 by agreement |
| Grades | EN E155, E195, E235, E275, E355; ASTM/SAE carbon steel grades by order |
| Outside Diameter | 5.0–200 mm; EN 10305-2 precision certified range normally applies up to D ≤ 150 mm |
| Wall Thickness | 0.5–20 mm; EN preferred precision table normally covers 0.5–10 mm, with heavier wall by agreement |
| Length | 1–12 m, fixed length or random length; cut-to-length service available |
| Tolerance Range | Typical OD tolerance: ±0.08 to ±0.80 mm depending on diameter; wall tolerance: ±7.5% or ±0.10 mm, whichever is greater; reduced tolerance by agreement |
| Heat Treatment | +C cold drawn/hard, +LC soft cold drawn, +SR stress relieved, +A annealed, +N normalized; delivery condition must be stated in the purchase order |
| Brand Name | Torich |
| Model Number | DOM |
| Certification | ISO 9001 ISO14001 TS16949 |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 60000tons per year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Material | Low-carbon and medium-carbon unalloyed steel for ERW and cold drawn DOM tube production | Standards | ASTM A513/A513M Type 5, EN 10305-2, SAE J525, JIS G 3445, GOST 10707, GB/T 24187, GB/T 13793 by agreement |
| Grades | EN E155, E195, E235, E275, E355; ASTM/SAE carbon steel grades by order | Outside Diameter | 5.0–200 mm; EN 10305-2 precision certified range normally applies up to D ≤ 150 mm |
| Wall Thickness | 0.5–20 mm; EN preferred precision table normally covers 0.5–10 mm, with heavier wall by agreement | Length | 1–12 m, fixed length or random length; cut-to-length service available |
| Tolerance Range | Typical OD tolerance: ±0.08 to ±0.80 mm depending on diameter; wall tolerance: ±7.5% or ±0.10 mm, whichever is greater; reduced tolerance by agreement | Heat Treatment | +C cold drawn/hard, +LC soft cold drawn, +SR stress relieved, +A annealed, +N normalized; delivery condition must be stated in the purchase order |
| Brand Name | Torich | Model Number | DOM |
| Certification | ISO 9001 ISO14001 TS16949 | Place of Origin | China |
| High Light | drawn over mandrel steel tube ，dom metal tubing | ||
High precision cold drawn DOM welded tubes are ERW carbon steel mechanical tubes processed by cold drawing over a mandrel to improve OD/ID accuracy, wall uniformity, concentricity, surface finish, and mechanical stability. They are suitable when ordinary ERW tubing is not precise enough for machining, press-fitting, bearing support, or controlled assembly clearance. For international purchasing, the recommended baseline is ASTM A513/A513M Type 5 for DOM mechanical tubing or EN 10305-2 for welded cold drawn precision tubes.
| Item | Standard Supply Description |
|---|---|
| Material | Low-carbon and medium-carbon unalloyed steel for ERW and cold drawn DOM tube production |
| Standards | ASTM A513/A513M Type 5, EN 10305-2, SAE J525, JIS G 3445, GOST 10707, GB/T 24187, GB/T 13793 by agreement |
| Grades | EN E155, E195, E235, E275, E355; ASTM/SAE carbon steel grades by order |
| Outside Diameter | 5.0-200 mm; EN 10305-2 precision certified range normally applies up to D ≤ 150 mm |
| Wall Thickness | 0.5-20 mm; EN preferred precision table normally covers 0.5-10 mm, with heavier wall by agreement |
| Length | 1-12 m, fixed length or random length; cut-to-length service available |
| Tolerance Range | Typical OD tolerance: ±0.08 to ±0.80 mm depending on diameter; wall tolerance: ±7.5% or ±0.10 mm, whichever is greater; reduced tolerance by agreement |
| Straightness | For D > 15 mm and L > 1000 mm: max. 0.0015L for ReH ≤ 500 MPa; max. 0.002L for ReH > 500 MPa; not more than 3 mm per 1 m unless tighter straightness is specified |
| Surface Condition | Smooth OD and ID, bright or oiled surface; EN 10305-2 reference roughness Ra ≤ 4 µm; improved roughness available by agreement |
| Heat Treatment | +C cold drawn/hard, +LC soft cold drawn, +SR stress relieved, +A annealed, +N normalized; delivery condition must be stated in the purchase order |
| Professional Concern | How We Address It |
|---|---|
| Will the tube maintain ID accuracy after machining or press-fitting? | We recommend specifying OD + ID rather than OD + wall only for precision-fit parts. Eccentricity, ovality, and wall variation can be checked during production, and reduced tolerance can be agreed before mass production. |
| Will the weld seam survive expansion, bending, or mechanical loading? | For critical components, we can apply weld-area quality control through NDT, flattening, drift-expanding, or customer-specific validation tests. The delivery condition should be selected according to whether the tube requires forming, machining, or higher strength. |
| Will the supplied material match the drawing and certificate? | Tubes can be ordered by standard, grade, dimension, heat treatment, and inspection document type. For traceability, inspection certificates can include chemical composition, tensile results, dimensional records, surface condition, and batch identification. |
| Standard System | Relevant Standard | Scope Summary |
|---|---|---|
| ASTM | ASTM A513/A513M Type 5 | Electric-resistance-welded carbon and alloy steel mechanical tubing; Type 5 refers to drawn-over-mandrel tubing |
| SAE | SAE J525 | Welded and cold drawn low-carbon steel tubing for pressure lines requiring bending, flaring, forming, and brazing |
| EN | EN 10305-2 | Welded cold drawn precision steel tubes, typically for automotive, furniture, and general engineering use |
| GOST | GOST 10707 | Steel cold-deformed electrically welded tubes made from unalloyed carbon steel |
| JIS | JIS G 3445 | Carbon steel tubes for machine structure |
| GB | GB/T 24187 | Cold-drawn precision single welded steel tubes |
| GB | GB/T 13793 | Longitudinal electric-resistance-welded steel pipes |
Automotive shock absorber cylinder tube -- used where the tube must provide controlled ID, stable straightness, good surface condition, and predictable mechanical performance for piston movement and assembly reliability.
| Grade | Steel No. | C Max | Si Max | Mn Max | P Max | S Max | Al Total Min |
|---|---|---|---|---|---|---|---|
| E155 | 1.0033 | 0.11 | 0.35 | 0.70 | 0.025 | 0.025 | 0.015 |
| E195 | 1.0034 | 0.15 | 0.35 | 0.70 | 0.025 | 0.025 | 0.015 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | 0.015 |
| E275 | 1.0225 | 0.21 | 0.35 | 1.40 | 0.025 | 0.025 | 0.015 |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | 0.020 |
| Grade | Steel No. | +SR Rm Min MPa | +SR ReH Min MPa | +SR A Min % | +N Rm MPa | +N ReH Min MPa | +N A Min % |
|---|---|---|---|---|---|---|---|
| E155 | 1.0033 | 350 | 245 | 18 | 270-410 | 155 | 28 |
| E195 | 1.0034 | 370 | 260 | 18 | 300-440 | 195 | 28 |
| E235 | 1.0308 | 440 | 325 | 14 | 340-480 | 235 | 25 |
| E275 | 1.0225 | 510 | 375 | 12 | 410-550 | 275 | 22 |
| E355 | 1.0580 | 590 | 435 | 10 | 490-630 | 355 | 22 |
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
A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta... A Professional Steel Pipes Materials Inventor, Manufacturer And Solution Provider TORICH INTERNATIONAL LIMITED is a professional inventor, manufacturer, and solution provider of steel pipe materials, integrating production and international trade, specializing in various precision steel pipes. Esta...
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