Stainless Steel 304 Square Pipes

Stainless steel 304 square pipes are hollow structural sections made from an 18% chromium–8% nickel austenitic alloy. Manufactured primarily in accordance with ASTM A554 and A312, these square-profile pipes deliver superior corrosion resistance and well-maintained mechanical properties for common applications.

Durability is assured by a 515 MPa tensile strength and 205 MPa yield. These sections, spanning 15×15 mm to 200×200 mm with 12 mm thickness, handle 870 °C easily. Whether in food plants or automotive shops, their balanced load-bearing design excels. They provide a sturdy, resilient fix for structural frames across construction and chemical industries. You can choose this versatile material for the industrial or architectural environments where consistent, high-level performance is essential.

Stainless Steel 304 Square Pipes Price

The SS 304 Square Pipe price in India for standard 2B mill-finish sections in common sizes is influenced by section size, wall thickness, surface finish, and prevailing raw material rates.

Approx Price Range

304 Stainless Steel Pipe price per square foot ranges between ₹200 and ₹500 per kg; the equivalent price per square foot typically ranges from ₹750 to ₹2,350 per sq ft. While 15x15 to 50x50 mm portions offer the best value, sections exceeding 101x101 mm demand higher prices for material and labour. Refined BA and polished finishes are also more expensive than basic industrial mill finishes due to additional processing. These factors ensure you pay for the exact volume and surface quality your build requires. 

Price Per kg

SS 304 Square Pipe prices per kilogram in India typically fall between 200 and 500 for normal sections. Get project-specific quotes from verified SS 304 Square Pipe vendors.

Factors Affecting Price

Please review the following factors that influence the current market pricing for these products:

• Nickel Content: The 8–10.5% nickel concentration remains the primary driver of raw material costs.
  
  
• Dimensions: Larger section sizes and heavier wall thicknesses increase the total material weight required.
  
  
• Surface Finish: It costs more to process premium BA or mirror-polished finishes than it does to manufacture ordinary mill finishes.
  
  
• Order Quantity: High-volume mill orders typically secure significantly lower per-kilogram rates than small-lot purchases.
  
  
• Custom Processing: Special cut-to-length requirements involve additional labour, handling, and precision cutting charges.
  
  
• Certification Level: EN 10204 3.1 inspection certification adds a small price premium for verified quality.

Types of Stainless Steel 304 Square Pipes

Explore the different manufacturing and finishing choices that meet the exact needs of your project.

• Welded Square Pipes (ASTM A554 / A312)
• ERW Square Pipes
• Seamless Square Pipes
• Bright Annealed (BA) Square Pipes
• No. 4 Polished Square Pipes
• Mirror-Polished Square Pipes
• Pickled and Passivated Square Pipes

Stainless Steel 304 Square Pipes Specifications

Key specification parameters for SS 304 Square Pipes relevant to procurement and engineering design.

Chemical Composition of Stainless Steel 304 Square Pipes

The chemical composition below applies to grade 304 / MT304 as specified under ASTM A554 and ASTM A312. These element limits directly influence corrosion performance and weldability.

Chromium (18.00–20.00%) establishes the passive oxide film that resists oxidation and general atmospheric corrosion. 

Nickel (8.00–10.50%) maintains the austenitic structure and improves formability. 

Carbon (max 0.08%) is controlled to limit sensitisation at weld heat-affected zones in standard (non-L) grade.

Mechanical Properties of Stainless Steel 304 Square Pipes

Mechanical property minimums for grade 304 Square pipes in the annealed condition per ASTM A554 / ASTM A312.

Physical Properties of Stainless Steel 304 Square Pipes

Physical properties of grade 304 in the annealed condition, applicable to square-section pipes.

Stainless Steel 304 Square Pipes Size Chart

Use this chart to find the approximate weight per length for these specific dimensions.

Schedule Chart of Stainless Steel 304 Square Pipes

Wall thickness schedules and indicative SS 304 Square Pipe weight per meter for selected sizes (density 7.93 g/cm³).

Key Features of Stainless Steel 304 Square Pipes

Check the advantages and properties of SS 304 Square Pipes that make these square pipes an ideal choice for industrial use:

• Square Cross-Section Geometry
• 18% Chromium Passive Layer
• Diverse Surface Finishes
• Excellent Weldability
• Non-Magnetic Properties
• High-Temperature Capability
• Uniform Wall Thickness

Applications of Stainless Steel 304 Square Pipes

These versatile components are widely implemented across various sectors for structural, decorative, and industrial purposes:

• Structural Framing
• Railings and Balustrades
• Food and Beverage Equipment
• Furniture and Architecture
• Automotive and Transportation
• Chemical Plant Structures
• Water Treatment Installations
• Signage and Display

How to Choose the Right Stainless Steel 304 Square Pipes Supplier?

Choosing the right material for your project is a crucial decision, as it makes a direct impact on the structural stability and output of the project. The following are some points that must be considered before purchasing Stainless Steel 304 Square Pipes

Selecting the Right Supplier

When evaluating SS 304 Square Pipe suppliers, the primary checkpoint is material traceability. Confirm that the supplier can provide a mill test certificate (MTC) linked to the specific heat number of the material offered. Generic or company-issued test certificates are not a substitute for a genuine EN 10204 3.1 mill document.

Technical Considerations

Match the offered section size and wall thickness to your design loads. For architecturally visible applications, specify the surface finish Ra value (typically Ra ≤ 0.8 μm for No. 4; Ra ≤ 0.1 μm for mirror finish). For structural applications, confirm that the minimum yield strength of 205 MPa is met for all heats in the lot.

Evaluating Supplier Credibility

Choose suppliers who use ISO 9001 quality management systems. Look for ISO 14001 and ISO 45001 to find teams committed to safety and nature. Request project references before placing large fabrication orders. These actions ensure you partner with reliable, safe, and high-quality manufacturing experts.

Procurement Strategy

Make sure your orders list ASTM A554 or A312 and grade TP304/MT304. Include the size, thickness, finish, and MTC type. For certain lengths, request an additional 2-5% to account for cutting waste. These straightforward techniques ensure you acquire just what you require without depleting on-site metal resources.