Shaanxi Shangyou Stainless Steel Co., Ltd.
| Key Feature | Automatic welding without filler; as-welded or cold-reduced; round/square/rectangular shapes; OD to 16in |
| Delivery Condition | As-Welded / Welded & Annealed / Cold-Reduced / Cold-Reduced & Annealed |
| Common Grades | MT-304, MT-304L, MT-316, MT-316L, MT-321, MT-347, MT-430 |
| Manufacturing Process | Flat-Rolled Stock → Forming → Automatic Welding (No Filler) → Optional Cold Reduction → Sizing → Testing |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| Supply Ability | Stock supply, regular production and custom manufacturing available. |
| Material Type | Austenitic Stainless Steel (Welded, No Filler Metal) |
| Surface Finish | Mill Finish / Pickled / Polished / Coated (per customer requirement) |
| Chemical Composition (MT-304) | Cr 18.0-20.0% / Ni 8.0-11.0% / C ≤ 0.08% / Fe Balance |
| Product Alias | Mechanical Tube / Ornamental Tube / Structural Tube / Exhaust Tube / Square/Rectangular Stainless Tube / Decorative Tube |
| Chemical Composition (MT-316) | Cr 16.0-18.0% / Ni 10.0-14.0% / Mo 2.0-3.0% / C ≤ 0.08% / Fe Balance |
| Delivery Time | 7-15 |
| Packaging Details | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Product Name | ASTM A554 Welded Stainless Steel Mechanical Tubing |
| Place of Origin | China |
| Brand Name | Shangyou |
| Certification | ISO9001 |
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Product Specification
| Key Feature | Automatic welding without filler; as-welded or cold-reduced; round/square/rectangular shapes; OD to 16in | Delivery Condition | As-Welded / Welded & Annealed / Cold-Reduced / Cold-Reduced & Annealed |
| Common Grades | MT-304, MT-304L, MT-316, MT-316L, MT-321, MT-347, MT-430 | Manufacturing Process | Flat-Rolled Stock → Forming → Automatic Welding (No Filler) → Optional Cold Reduction → Sizing → Testing |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union | Supply Ability | Stock supply, regular production and custom manufacturing available. |
| Material Type | Austenitic Stainless Steel (Welded, No Filler Metal) | Surface Finish | Mill Finish / Pickled / Polished / Coated (per customer requirement) |
| Chemical Composition (MT-304) | Cr 18.0-20.0% / Ni 8.0-11.0% / C ≤ 0.08% / Fe Balance | Product Alias | Mechanical Tube / Ornamental Tube / Structural Tube / Exhaust Tube / Square/Rectangular Stainless Tube / Decorative Tube |
| Chemical Composition (MT-316) | Cr 16.0-18.0% / Ni 10.0-14.0% / Mo 2.0-3.0% / C ≤ 0.08% / Fe Balance | Delivery Time | 7-15 |
| Packaging Details | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. | Product Name | ASTM A554 Welded Stainless Steel Mechanical Tubing |
| Place of Origin | China | Brand Name | Shangyou |
| Certification | ISO9001 |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A554 welded stainless steel mechanical tubing for global fabricators, architectural contractors, exhaust system manufacturers, and structural component producers requiring durable stainless tubing with aesthetic appeal and mechanical performance. Produced to ASTM A554/A554M, this specification covers welded austenitic, ferritic, and duplex stainless steel mechanical tubing intended for ornamental, structural, exhaust, and other applications where appearance, mechanical properties, or corrosion resistance is needed.
ASTM A554 covers as-welded or cold-reduced mechanical tubing in sizes to 16 in. [406.4 mm] outside dimension, with wall thicknesses of 0.020 in. [0.51 mm] and over. The tubes are manufactured from flat-rolled steel by an automatic welding process without the addition of filler metal. Tubes shall be furnished in one of the following shapes: round, square, rectangular, or special, making this specification highly versatile for architectural and structural applications. Grades covered include austenitic MT-301 through MT-347, ferritic MT-429 and MT-430, and duplex grades.
| Dimension | Specification |
|---|---|
|
Product Name
|
ASTM A554 Welded Stainless Steel Mechanical Tubing |
|
Product Alias
|
Mechanical Tube / Ornamental Tube / Structural Tube / Exhaust Tube / Square/Rectangular Stainless Tube / Decorative Tube |
|
Material Type
|
Austenitic Stainless Steel (Welded, No Filler Metal) |
|
Key Feature
|
Automatic welding without filler; as-welded or cold-reduced; round/square/rectangular shapes; OD to 16in |
|
Common Grades
|
MT-304, MT-304L, MT-316, MT-316L, MT-321, MT-347, MT-430 |
|
Chemical Composition (MT-316)
|
Cr 16.0-18.0% / Ni 10.0-14.0% / Mo 2.0-3.0% / C ≤ 0.08% / Fe Balance |
|
Chemical Composition (MT-304)
|
Cr 18.0-20.0% / Ni 8.0-11.0% / C ≤ 0.08% / Fe Balance |
|
Manufacturing Process
|
Flat-Rolled Stock → Forming → Automatic Welding (No Filler) → Optional Cold Reduction → Sizing → Testing |
|
Delivery Condition
|
As-Welded / Welded & Annealed / Cold-Reduced / Cold-Reduced & Annealed |
|
Surface Finish
|
Mill Finish / Pickled / Polished / Coated (per customer requirement) |
|
Primary Applications
|
Ornamental Handrails / Structural Frames / Exhaust Systems / Furniture / Signage / Medical Equipment / Architectural Decor |
| Parameter | Available Options |
|---|---|
|
Product Standard
|
ASTM A554/A554M |
|
Grade Equivalents
|
MT-304 (UNS S30400), MT-304L (UNS S30403), MT-316 (UNS S31600), MT-316L (UNS S31603), MT-321 (UNS S32100), MT-347 (UNS S34700), MT-430 (UNS S43000), plus duplex grades |
|
Outside Dimension
|
Up to 16 in. [406.4 mm] OD (round) or outside dimension (square/rectangular) |
|
Wall Thickness (WT)
|
0.020 in. [0.51 mm] and over |
|
Shapes
|
Round / Square / Rectangular / Special Shapes |
|
Length
|
Cut-to-length per order |
|
Delivery Condition
|
As-Welded / Welded & Annealed / Cold-Reduced / Cold-Reduced & Annealed |
|
Welding Process
|
Automatic welding process, no filler metal added |
|
Inspection
|
Tension Test / Flattening Test / Flange Test / Hydrostatic or NDE Test (per agreement) |
|
Documents
|
MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A554 mechanical tubing is specified for applications where appearance, mechanical properties, or corrosion resistance is needed, but pressure-containing capability is not the primary requirement.
Typical applications include:
Key selection considerations: ASTM A554 is the mechanical counterpart to ASTM A312/A269 (which cover pressure-containing tubing) and ASTM A249 (which covers heat exchanger tubing). This specification does not require heat treatment unless specified, making it more cost-effective for non-pressure applications. As-welded condition is the most economical option for applications where the weld bead and scale are acceptable. Annealed condition is available when improved corrosion resistance and formability are required. Cold-reduced condition increases strength and improves dimensional precision. Select MT-304 for general ornamental and structural use; MT-316 when chlorides are present; MT-430 for ferritic alternatives with magnetic properties and lower cost.
Processing, Packaging and After-Sales
Shangyou Stainless Steel provides value-added processing including custom cutting, forming, bending, welding, polishing, and coating for mechanical tubing.
All tubes are packed with export-standard protection including protective end caps, steel strapping, waterproof wrapping, and wooden pallets or steel frames.
Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (SGS, TUV, BV) can be arranged upon request.
1. What is ASTM A554?
ASTM A554 is the standard specification for welded stainless steel mechanical tubing for ornamental, structural, exhaust, and other applications where appearance, mechanical properties, or corrosion resistance is needed.
2. What size range does ASTM A554 cover?
Up to 16 in. [406.4 mm] outside dimension, with wall thickness 0.020 in. [0.51 mm] and over.
3. What shapes are available under ASTM A554?
Round, square, rectangular, or special shapes as specified by the purchaser.
4. What is the difference between ASTM A554 and ASTM A269?
ASTM A554 covers mechanical tubing for non-pressure applications (ornamental, structural, exhaust); ASTM A269 covers pressure-containing tubing for general service with mandatory heat treatment.
5. Is filler metal used in welding ASTM A554 tube?
No. Tubes are manufactured by an automatic welding process without the addition of filler metal.
6. What grades are available under ASTM A554?
Austenitic grades MT-301 through MT-347, ferritic grades MT-429/MT-430, and duplex grades.
7. What is the difference between MT-304 and MT-316?
MT-316 contains 2-3% molybdenum for improved pitting resistance; MT-304 does not. Both are austenitic grades.
8. What delivery conditions are available?
As-welded, welded and annealed, cold-reduced, or cold-reduced and annealed.
9. What are typical applications for A554 tubing?
Ornamental handrails, structural frames, exhaust systems, furniture, signage, medical equipment, and architectural decor.
10. What documents are provided with delivery?
MTC 3.1, inspection reports, packing list, and heat number traceability.
Need ASTM A554 welded stainless steel mechanical tubing for ornamental, structural, exhaust, or general mechanical applications? Send requirements including grade (MT-304/MT-316), shape (round/square/rectangular), dimension, wall thickness, length, quantity, and intended application.
Shangyou Stainless Steel provides custom sizes, shapes, processing, and export solutions for global B2B customers.
Company Details
Business Type:
Manufacturer
Year Established:
2022
Total Annual:
>$10 million
Employee Number:
>100
Ecer Certification：
Verified Supplier
About Us Shaanxi Shangyou Stainless Steel Co., Ltd. is a professional stainless steel manufacturer and global supplier specializing in the production and export of stainless steel pipes, sheets, coils, strips, bars, wires, profiles, and nickel alloy products. Our Expertise With exte... About Us Shaanxi Shangyou Stainless Steel Co., Ltd. is a professional stainless steel manufacturer and global supplier specializing in the production and export of stainless steel pipes, sheets, coils, strips, bars, wires, profiles, and nickel alloy products. Our Expertise With exte...
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