China Stainless Steel
stainless steel
special-shaped
pipe & tube
TeCarve supplies special tube and special tubes in oval, D-shaped, triangular and other specialty tubing shapes for architectural, mechanical and industrial projects. Available grades include 201, 304, 304L, 316, 316L and 430, with wall thicknesses from 0.5 mm to 5 mm. Shapes, lengths, material grades and surface finishes can be customized to customer drawings and project requirements.
For drawings, tooling, tolerance, and sample coordination, see our custom stainless steel tube fabrication service.
Specifications
Capability by Standard
Markets: N. America — custom-profile welded/mechanical tube (oval, D-shape, triangle, half-round, etc.)
| Shape Families | Oval, D-shaped, triangular, half-round, or fully custom profile per drawing |
|---|---|
| Size Envelope | Up to approx. 200mm across the largest profile dimension (larger on request) |
| Wall Thickness | 0.5mm – 5.0mm |
| Tolerance Basis | Neither A554 (round Table 2 / square-rectangular Table 5 only) nor A312 (round pipe only) publish a tolerance table for special/custom profiles; dimensional tolerance confirmed against the customer drawing |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 430
- Surface Finish: Mirror, satin, hairline, or electro-polished
- Tolerance Compliance: A554 (Table 2 round / Table 5 square-rectangular) and A312 (round) publish no special-profile tolerance table; dimensional tolerance for custom shapes is confirmed against the customer drawing
Markets: Europe — custom-profile welded tube for general engineering
| Shape Families | Oval, D-shaped, triangular, half-round, or fully custom profile per drawing |
|---|---|
| Size Envelope | Up to approx. 200mm across the largest profile dimension (larger on request) |
| Wall Thickness | 0.5mm – 5.0mm |
| Tolerance Basis | No EN 10296 special-profile tolerance table has been independently verified against primary text; dimensional tolerance confirmed against the customer drawing |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 430
- Surface Finish: Mirror, satin, hairline, or electro-polished
- Tolerance Compliance: A554 (Table 2 round / Table 5 square-rectangular) and A312 (round) publish no special-profile tolerance table; dimensional tolerance for custom shapes is confirmed against the customer drawing
Markets: Japan, Southeast Asia — custom-profile tube for machine & structural purposes
| Shape Families | Oval, D-shaped, triangular, half-round, or fully custom profile per drawing |
|---|---|
| Size Envelope | Up to approx. 200mm across the largest profile dimension (larger on request) |
| Wall Thickness | 0.5mm – 5.0mm |
| Tolerance Basis | No JIS G3446 special-profile tolerance table has been independently verified against primary text; dimensional tolerance confirmed against the customer drawing |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 430
- Surface Finish: Mirror, satin, hairline, or electro-polished
- Tolerance Compliance: A554 (Table 2 round / Table 5 square-rectangular) and A312 (round) publish no special-profile tolerance table; dimensional tolerance for custom shapes is confirmed against the customer drawing
Markets: China domestic & Belt-and-Road — custom-profile welded structural tube
| Shape Families | Oval, D-shaped, triangular, half-round, or fully custom profile per drawing |
|---|---|
| Size Envelope | Up to approx. 200mm across the largest profile dimension (larger on request) |
| Wall Thickness | 0.5mm – 5.0mm |
| Tolerance Basis | No GB/T 12770 special-profile tolerance table has been independently verified against primary text; dimensional tolerance confirmed against the customer drawing |
- Supply Length / Form: Fixed lengths 1–12 m; custom lengths and cut-to-length available
- Available Grades: 304, 304L, 316, 316L, 321, 430
- Surface Finish: Mirror, satin, hairline, or electro-polished
- Tolerance Compliance: A554 (Table 2 round / Table 5 square-rectangular) and A312 (round) publish no special-profile tolerance table; dimensional tolerance for custom shapes is confirmed against the customer drawing
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 430 | S43000 | 1.4016 | SUS430 | 10Cr17 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0-18.0 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 22% | ≤89 HRB / ≤200 HV |
- Standards Conformance: ASTM A554/A312 · EN 10296/10088 · JIS G3446/G3468 · GB/T 12770/18705 · ISO 15510
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
Features
• Variety of custom cross-sectional shapes
• Excellent corrosion resistance and formability
• Decorative and structural versatility
• Tight tolerances and uniform wall thickness
• Architectural & decorative structures
• Custom equipment and machinery housings
• Furniture and automotive trim
• Public facilities and infrastructure
Applications
For custom profile and non-standard shaped tubing, check how buyers can verify our tooling customization, cold-drawing dimensional consistency, and pre-shipment inspection checklist.
Quality Control
• CNC-molded shaping for precision profiles
• Visual and dimensional inspection
• Surface finish quality grading
• Optional third-party certification available
Custom Special-Shaped Tube Manufacturing
Who manufactures custom special-shaped stainless steel tube?
TeCarve is a China-based, manufacturing-backed supplier of custom special-shaped stainless steel tube, producing oval, D-shaped, triangular, and other custom cross-sectional profiles in grades 201, 304, 304L, 316, 316L, and 430, with wall thickness from 0.5mm to 5mm and lengths from 1m to 12m (custom lengths available).
What is the minimum order quantity (MOQ) for custom special-shaped tube?
MOQ is typically 100–300kg depending on the shape complexity and grade selected. Send us your drawing or sample for an exact quote.
What is the process from drawing to production?
1) Submit your technical drawing or sample, including cross-section profile, OD/wall thickness, tolerance, grade, and length. 2) Our engineering team reviews tooling feasibility and confirms MOQ and lead time. 3) Sample production and approval where required. 4) Bulk production with full material traceability (Mill Test Certificate provided). See our custom stainless steel tube fabrication service for drawing, tooling, and tolerance coordination.
Where is TeCarve's special-shaped tube manufactured?
Production takes place at TeCarve's manufacturing partners in Foshan, Guangdong and Wenzhou, Zhejiang, China. TeCarve Tech Co., Ltd. coordinates export, quality control, and logistics from Hangzhou.
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Special-shaped Tube Inspection & Packaging Photos
Real factory, inspection, packaging and loading photos from TeCarve gallery pages.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We tailor stainless steel special-shaped pipe and tube by cross-sectional profile, including the page's oval, D-shaped, and triangular options, together with wall thickness, length, grade, and surface finish.
Low MOQ & Rapid Prototyping
Small batch customization and sample production are supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
Most orders ship within 10–25 days after deposit. Exact timing depends on product specification, required documentation, and order volume.
Global Logistics & On-Time Delivery
For special-shaped tube shipments to over 50 countries, seaworthy wooden cases and pallets protect formed profiles while custom barcoding and labeling identifies each requested shape.
Frequently Asked Questions
What are special-shaped stainless steel tubes?
Special-shaped (non-round) stainless steel tubes include hexagonal, D-shaped, elliptical, triangular, and fully custom profile tubes manufactured by cold drawing through custom dies from round tube preforms.
What profiles can TeCarve manufacture as special-shaped tube?
We produce hexagonal, oval, D-shape, flat-sided oval, semi-circular, triangular, and fully custom cross-section tubes. Complex profiles are drawn to customer CAD drawings; tooling (die) investment is required for new custom profiles.
What grades are available for special-shaped stainless steel tube?
Special-shaped tubes are produced in grades 304, 304L, 316, 316L, and 321. The cold-drawing process improves dimensional accuracy and mechanical properties compared to standard welded round tube.
What is the minimum order quantity for custom-profile stainless steel tube?
Custom profile tube typically requires 200–500 kg minimum order depending on profile complexity. First-article samples for dimensional approval can be produced before committing to a full production run.
What industries use special-shaped stainless steel tube?
Applications include medical device shafts (D-profile catheter tubes), automotive trim and structural inserts, hexagonal lock cylinders, architectural handrail components, and specialty fluid handling systems requiring non-circular bore cross-sections.