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Quality Weldable Stainless Steel Square Tube Brushed Polished Stainless Steel Square Tubing factory
Quality Weldable Stainless Steel Square Tube Brushed Polished Stainless Steel Square Tubing factory

Weldable Stainless Steel Square Tube Brushed Polished Stainless Steel Square Tubing

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

Weldable Stainless Steel Square Tube
Product Summary
The Stainless Steel Welded Square Tubing is manufactured from high-quality austenitic stainless steel coils, formed into a square shape, and longitudinally welded using advanced TIG (GTAW) or ERW processes. This product offers an excellent combination of corrosion resistance, structural strength, ...

Product Details

Highlight:

Weldable Stainless Steel Square Tube

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Stainless Steel Square Tube Brushed

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Polished Stainless Steel Square Tubing
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

The Stainless Steel Welded Square Tubing is manufactured from high-quality austenitic stainless steel coils, formed into a square shape, and longitudinally welded using advanced TIG (GTAW) or ERW processes. This product offers an excellent combination of corrosion resistance, structural strength, and aesthetic appeal. Its square profile provides superior load-bearing characteristics, ease of fabrication, and clean, modern appearance, making it the preferred choice for structural, architectural, and industrial applications.

Product Specifications
Parameter Details
Standards ASTM A554, A269, A312; EN 10219-2; JIS G3446
Available Grades 304, 304L, 316, 316L, 201
Square Sizes 10 mm * 10 mm – 300 mm * 300 mm (3/8″ * 3/8″ – 12″ * 12″)
Wall Thickness 0.5 mm – 6.0 mm (20 ga – 1/4″)
Length Fixed lengths 3m / 6m, or custom lengths upon request
Welding Process TIG (GTAW), Laser, or ERW
Heat Treatment Annealed after welding (typical)
Surface Finish Mill finish, pickled, polished (180-600 grit), brushed, or mirror
Corner Radius Sharp square or radiused (as required)
End Finish Plain ends, capped, or punched
Chemical Composition (Typical Values, %)
Grade C ≤ Si ≤ Mn ≤ P ≤ S ≤ Cr Ni
304 0.08 0.75 2.00 0.045 0.030 18.0-20.0 8.0-10.5
304L 0.03 0.75 2.00 0.045 0.030 18.0-20.0 8.0-12.0
316 0.08 0.75 2.00 0.045 0.030 16.0-18.0 10.0-14.0
316L 0.03 0.75 2.00 0.045 0.030 16.0-18.0 10.0-14.0

Composition per ASTM A554. Molybdenum grades (316/316L) available for enhanced corrosion resistance.

Mechanical Properties (at Room Temperature)
Grade Tensile Strength (MPa) min Yield Strength (MPa) min Elongation (%) min Hardness (HRB) max
304 515 205 35 92
304L 485 170 35 92
316 515 205 35 95
316L 485 170 35 95

Tested in accordance with ASTM E8 / E8M.

Key Features

  • High Strength-to-Weight Ratio – Square geometry provides excellent structural rigidity

  • Superior Corrosion Resistance – Suitable for indoor, outdoor, and marine environments

  • Aesthetic Appearance – Clean lines and polished finishes for architectural use

  • Excellent Weldability – Can be easily welded to other stainless steel components

  • Good Formability – Bendable and machinable for custom fabrications

  • Low Maintenance – Easy to clean, resistant to staining and rust

  • Hygienic Surface – Non-porous surface ideal for food and pharmaceutical applications

  • Fire Resistant – Non-combustible, maintains integrity at high temperatures

Dimensional Tolerances (ASTM A554)
Parameter Tolerance
Outside dimensions ±0.4 mm for sizes ≤ 50 mm; ±0.8% for larger sizes
Wall thickness ±10%
Length +0 / -3 mm for fixed lengths
Twist 1 mm + 0.5 mm per meter
Concave / Convex 0.8% of width
Squareness of corners 90° ± 1°
Surface Finish Options
Finish Description Application
Mill Finish As-welded, oxide scale present Industrial / hidden structures
Pickled Acid-cleaned, removes scale Chemical / marine environments
Brushed / Satin 180-320 grit directional grain Architectural railings, furniture
Polished 400-600 grit, semi-reflective Food equipment, decorative trim
Mirror 800+ grit, highly reflective Elevator interiors, luxury architecture
Applications
Structural

  • Building frameworks and supports

  • Bridge railings and crash barriers

  • Mezzanine floors and platforms

  • Scaffolding and guardrails

Architectural

  • Handrails, balustrades, and staircases

  • Window and door frames

  • Curtain wall supports

  • Decorative screens and partitions

Industrial

  • Conveyor frames and machine guards

  • Equipment stands and workbenches

  • Storage racks and shelving

  • Cart and trolley frames

Transportation

  • Truck and trailer body frames

  • Bus handrails and grab bars

  • Marine railings (316 grade)

  • Railway station structures

Food & Pharmaceutical

  • Sanitary equipment frames

  • Workstation legs and supports

  • Cleanroom structures

Fabrication Guidelines
Process Recommendation
Cutting Band saw, abrasive wheel, or plasma cutter
Welding TIG (GTAW) recommended; use matching filler rod (ER308/ER316)
Bending Use mandrel bender for tight radii; annealed condition preferred
Drilling Cobalt or carbide drill bits; use cutting fluid
Surface Protection Apply peelable film or tape during fabrication to prevent scratches
Contact Us

For inquiries, technical datasheets, or custom sizes, please contact our sales team.

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