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 | Structure Pipe,Hydraulic Pipe,Construction,Fluid Pipe,Oil Pipe |
| Outer diameter(round) | 30 - 426 mm |
| Thickness | 2 - 100 mm |
| Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Grade | 28Mn6 C35E E235 E355 E420 |
| Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe,cold drawn |
| Length | 6M or as requirement,As customer's require |
| Product name | steel tubes,Cold drawn precision round carbon steel tube,Stainless steel seamless pipe 304 304l 316 316l,Seamless Steel Pipe,Good quality weld cold drawn hydraulic cylinder precision steel tube |
| Brand Name | TORICH |
| Model Number | 28Mn6 |
| 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 | Structure Pipe,Hydraulic Pipe,Construction,Fluid Pipe,Oil Pipe | Outer diameter(round) | 30 - 426 mm |
| Thickness | 2 - 100 mm | Technique | Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn |
| Grade | 28Mn6 C35E E235 E355 E420 | Special pipe | Thick Wall Pipe,API Pipe,Precision steel tube,precision seamless pipe,cold drawn |
| Length | 6M or as requirement,As customer's require | Product name | steel tubes,Cold drawn precision round carbon steel tube,Stainless steel seamless pipe 304 304l 316 316l,Seamless Steel Pipe,Good quality weld cold drawn hydraulic cylinder precision steel tube |
| Brand Name | TORICH | Model Number | 28Mn6 |
| Certification | ISO9001 ISO 14001 TS16949 | Place of Origin | Zhejiang/China |
| High Light | Cold Sized Carbon Steel Tube ，Tight Tolerances Precision Steel Tube ，Good Mechanical Strength Welded Cold-Sized Tube | ||
EN 10305-3 (Welded Cold-Sized Tubes) defines the technical delivery conditions for welding cold-sized steel tubes used in precision applications.
“28Mn6” (steel number 1.1170) is a heat-treatable, manganese-containing carbon steel grade commonly used in mechanical and automotive applications.
When used in welded cold-sized tubes under EN 10305-3, 28Mn6 provides a balance of strength, formability, and weldability, making it suited for structural and precision uses.
Below is a representative (“typical”) specification summary (not a full standard text):
Product Type: Welded cold-sized (i.e. welded and then cold reduced for precise tolerance) steel tubes (circular, square, rectangular cross-sections)
Maximum Outside Diameter (circular): up to 193.7 mm according to the standard scope
Tolerance & Surface Roughness: tight dimensional tolerances and a maximum permitted surface roughness (not freely given in summary sources)
Heat-treatment / Delivery Conditions: as-welded, cold-sized, optionally normalizing, annealing, or quench & tempering depending on requirements and grade
Typical Wall Thickness / Lengths: common ranges (e.g. wall thickness from ~0.5 mm upward, standard lengths typical per manufacturer)
| Steel Grade | C (wt %) | Si (max) | Mn (range) | P (max) | S (max) |
|---|---|---|---|---|---|
| 28Mn6 (1.1170) | 0.25 – 0.32 | ≤ 0.40 | 1.30 – 1.65 | ≤ 0.035 | ≤ 0.035 |
| C35E (EN) | ~0.32 | ~0.40 | ~0.80–1.20 | ~0.025 | ~0.025 |
| E235 (EN 10305 series) | ~0.17 (max) | ~0.35 | ~1.20 (max) | ~0.025 | ~0.025 |
| E355 (EN 10305 series) | ~0.22 (max) | ~0.55 | ~1.60 | ~0.025 | ~0.025 |
| E420 (EN 10305 series) | ~0.16 (max) | ~0.50 | ~1.70 | ~0.025 | ~0.025 |
| Grade / Condition | Yield Strength (Rp0.2) (MPa) | Tensile Strength (Rm) (MPa) | Elongation A5 (%) | Reduction of Area Z (%) | Notch Impact (ISO-V) J |
|---|---|---|---|---|---|
| 28Mn6 (Normalized) | 345 (≤16 mm) | ≥ 630 | ≥ 17 % | — | — |
| 28Mn6 (Quenched & Tempered) | ~590 | 800–950 | ≥ 13 | ~40 | min 35 J |
| C35E (typical structural steel) | ~215–300 (varies with condition) | ~400–600 | ~15–20 | — | — |
| E235 (as delivered in EN 10305) | ~315 | ~390 | ~25 | — | — |
| E355 (EN 10305) | ~355 | ~490–630 | ~22 | — | — |
| E420 (EN 10305) | ~420 | ~540–630 | ~22 | — | — |
Precision dimensional control: after welding, the tube is cold-sized (reduced) to tight tolerances in outer diameter, wall thickness, straightness, and roundness as per EN 10305-3.
Good mechanical strength: 28Mn6 can deliver moderate to high strength, especially when heat-treated.
Good formability: in softer conditions, it can be cold-formed, bent, or flanged.
Weldability: acceptable weldability, though care must be taken in processing and potential post-weld treatment.
Surface quality: a defined maximum surface roughness is required by the standard to ensure compatibility in precision applications.
Versatility in heat treatment: it supports normalizing, quenching & tempering, annealing, providing flexibility to tailor property ranges.
EN 10305-3:2023 — Steel tubes for precision applications, technical delivery conditions for welded cold-sized tubes.
Earlier versions: EN 10305-3:2016 / 2010 / 2002
The tube must also satisfy general steel product delivery standards and reference standards such as EN 10020, EN 10021, EN 10027, EN 10204, EN 10266, and testing standards like EN 10246-3 (eddy current testing of tubes).
The standard is applicable for outside diameter ≤ 193.7 mm (for circular cross-section) and can also be extended to square/rectangular tubes.
This tube is suited for precision structural, mechanical, and assembly use in fields such as automotive systems, machinery, furniture frames, mechanical instrumentation, and assembly jigs.
| Application Field | Typical Use of 28Mn6 Welded Cold-Sized Tube |
|---|---|
| Automotive & Vehicle Frames | Structural cross-members, reinforcement struts, chassis tubular frames |
| Mechanical Equipment / Automation | Precision frames, guide rails, supports, sensor housings |
| Furniture & Fixtures | Slim, high-strength frame members or supports |
| Conveyance & Handling Systems | Light rails, rollers, guiding tubes |
| Instrumentation / Laboratory Equipment | Enclosures, shafts, tubes requiring controlled tolerances |
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
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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