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Quality ASTM A554 SS 304 Square Pipe Corrosion Resistant Square Hollow Section factory
Quality ASTM A554 SS 304 Square Pipe Corrosion Resistant Square Hollow Section factory

ASTM A554 SS 304 Square Pipe Corrosion Resistant Square Hollow Section

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

ASTM A554 SS 304 Square Pipe
Product Summary
What Is ASTM A554? ASTM A554 is the American standard for welded stainless steel mechanical tubing in round, square, and rectangular shapes. It is specifically designed for mechanical and structural applications – not for pressure service (use ASTM A269 or A312 for pressure). Square tubes under ASTM ...

Product Details

Highlight:

ASTM A554 SS 304 Square Pipe

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SS 304 Square Pipe Corrosion Resistant

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ASTM A554 Square Hollow Section
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
What Is ASTM A554?

ASTM A554 is the American standard for welded stainless steel mechanical tubing in round, square, and rectangular shapes. It is specifically designed for mechanical and structural applications – not for pressure service (use ASTM A269 or A312 for pressure).

Square tubes under ASTM A554 are produced as cold-formed welded tubes from stainless steel strips, then heat-treated and finished to meet mechanical property requirements. The standard covers multiple stainless steel grades, with 304 and 316 being the most common.

Quick Facts Value
Standard ASTM A554
Shape Square
Process Cold-formed + welded + heat treated
Key Feature Corrosion resistance + structural strength
Primary Use Architectural, handrails, furniture, frames
Common Grades 304, 304L, 316, 316L
ASTM A554 Square Tube Chemical Composition

ASTM A554 references standard stainless steel compositions per ASTM A240. Below are the most common grades.

Element Grade 304 Grade 304L Grade 316 Grade 316L
Carbon (C) ≤ 0.08 ≤ 0.035 ≤ 0.08 ≤ 0.035
Chromium (Cr) 18.0–20.0 18.0–20.0 16.0–18.0 16.0–18.0
Nickel (Ni) 8.0–10.5 8.0–12.0 10.0–14.0 10.0–14.0
Molybdenum (Mo) — — 2.00–3.00 2.00–3.00
Manganese (Mn) ≤ 2.00 ≤ 2.00 ≤ 2.00 ≤ 2.00
Phosphorus (P) ≤ 0.045 ≤ 0.045 ≤ 0.045 ≤ 0.045
Sulfur (S) ≤ 0.030 ≤ 0.030 ≤ 0.030 ≤ 0.030
Silicon (Si) ≤ 1.00 ≤ 1.00 ≤ 1.00 ≤ 1.00

Grade Selection Guide:

Grade Key Feature Typical Application
304 General-purpose, good corrosion resistance Handrails, furniture, frames
304L Low carbon, better weldability Welded structures, thin walls
316 Contains molybdenum, excellent corrosion resistance Marine, coastal, chemical exposure
316L Low carbon + molybdenum Marine welded structures
ASTM A554 Square Tube Mechanical Properties

ASTM A554 specifies mechanical property requirements based on the tube size (wall thickness) and heat treatment condition.

Tensile Requirements
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%)
304 ≥ 515 ≥ 205 ≥ 35
304L ≥ 485 ≥ 170 ≥ 35
316 ≥ 515 ≥ 205 ≥ 35
316L ≥ 485 ≥ 170 ≥ 35

Elongation measured in 50 mm (2 inches). Values are minimum requirements per ASTM A554.

Condition Options

ASTM A554 tubes can be supplied in multiple conditions:

Condition Description Application
As-welded No heat treatment after welding Non-critical, economy applications
Annealed Full solution annealing Maximum corrosion resistance and ductility
Stress-relieved Low-temperature heat treatment Reduced residual stress, good strength

Recommended: For architectural and structural applications, annealed condition provides the best combination of corrosion resistance and mechanical properties.

Dimensional Tolerances (ASTM A554)
Parameter Typical Tolerance
Outside dimensions ± 0.4 mm to ± 0.8 mm (size dependent)
Wall thickness ± 10%
Straightness ≤ 1.0 mm per meter
Twist ≤ 1° + 0.5° per meter
Corner radius 1.5* to 2.5* wall thickness (typical)
Standard Size Range (Square Tube)
Size (mm) Common Wall Thickness (mm)
10 * 10 0.8, 1.0, 1.2
20 * 20 1.0, 1.5, 2.0
25 * 25 1.5, 2.0, 2.5
30 * 30 1.5, 2.0, 2.5, 3.0
40 * 40 1.5, 2.0, 2.5, 3.0
50 * 50 2.0, 2.5, 3.0, 4.0
60 * 60 2.0, 2.5, 3.0, 4.0
80 * 80 2.5, 3.0, 4.0, 5.0
100 * 100 3.0, 4.0, 5.0, 6.0

Custom sizes and thicknesses available upon request.

Applications

Primary Use: Architectural and decorative structural applications

Other Applications:

  • Handrails and guardrails
  • Furniture frames (chairs, tables, shelves)
  • Display racks and shelving
  • Window and door frames
  • Structural supports
  • Food processing equipment
  • Marine and coastal structures (316/316L)
  • Medical equipment frames
  • Gym and fitness equipment

Quick Pick:

Need Choose
General architectural/indoor ASTM A554 304
Welded structures (thin wall) ASTM A554 304L
Marine / coastal/outdoor ASTM A554 316
Marine welded structures ASTM A554 316L
Quality Assurance

Every ASTM A554 square tube we supply is backed by comprehensive quality control.

Testing & Inspection
Test Purpose
Chemical analysis Verify composition per ASTM A240
Tensile test Confirm yield, tensile, elongation
Flattening test Assess ductility and weld quality
Reverse flattening test Check weld soundness
Hydrostatic test (Upon request – not typically required for mechanical tubing)
Eddy current / Ultrasonic NDT Detect surface and weld defects
Dimensional inspection Verify size, wall thickness, straightness, twist
Visual inspection Check surface finish and weld appearance
Certifications

  • EN 10204 Type 3.1 – Mill test certificate (standard)

  • EN 10204 Type 3.2 – Third-party verified (available on request)

  • Full traceability – Heat number traceable to the mill

Surface Finish Options
Finish Description Application
Mill finish As-welded, oxide present Economy, will be painted/coated
Pickled Acid cleaned, scale removed Industrial, food equipment
Brushed (satin) 180–240 grit, fine grain Architectural, handrails
Polished #4 polish, medium shine Furniture, decorative
Mirror finish #8 polish, highly reflective High-end architectural showpieces
Why Choose Us?
Advantage Detail
Stock availability Common sizes ready to ship
Custom cutting Cut to exact lengths
Surface finishing Brushing, polishing in-house
Fabrication services Drilling, welding, and bending are available
Global shipping Door-to-door delivery
Order Now

Request a ASTM A554 Square Tube Quote
 

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