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Stainless Steel Square Tubing: Sizes, Specifications, and Supplier Guide to USA

If you’re searching for a durable, corrosion-resistant solution for structural and decorative applications, stainless steel square tubing is one of the most reliable options available. From architectural frameworks to industrial fabrication, its strength, aesthetic appeal, and ease of maintenance make it a go-to material across sectors.

In this comprehensive guide, we’ll explore everything about stainless square tubing and ss pipe manufacturer in india, including square tubing sizes, specifications, grades like 304 stainless steel tubing, and insights into pricing, availability, and top suppliers.

What is Stainless Steel Square Tubing?

Stainless steel square tubing is a hollow section tube with a square cross-section made from corrosion-resistant stainless steel. It comes in various sizes, wall thicknesses, and grades to support both light-duty decorative applications and heavy-duty industrial use.

Popular in industries such as construction, marine, chemical processing, and food & beverage, square tubes provide a perfect balance between form and function.

Common Square Tubing Sizes & Dimensions

Stainless steel square tubing is available in a wide range of sizes, both in imperial and metric stainless tubing formats. Some commonly requested sizes include:

Square tubing sizes chart may vary based on the manufacturer and industry standards. Custom cuts and wall thicknesses are also available upon request.

Square Tube Specification

Typical square tubing specifications include:

• Grade: 304, 304L, 316, 316L
• Standard: ASTM A554, ASTM A312, ASTM A269
• Finish: Mill Finish, Brushed, Mirror Polish
• Shape: Square Hollow Section (SHS)
• Length: 6 meters (metric), 20 ft (standard)

These specifications ensure compliance with high-quality production standards for use in mechanical, structural, and architectural systems.

Stainless Steel Tubing Grades: 304 & More

304 Stainless Steel Tubing

The most commonly used grade, 304 stainless steel tubing, offers excellent corrosion resistance, weldability, and strength. It’s ideal for indoor and mild outdoor environments.

316 Stainless Steel Tubing

For more aggressive and corrosive conditions (marine, chemical), 316 stainless is preferred due to its molybdenum content.

Metric Stainless Tubing

Metric stainless tubing is used widely in international and OEM applications, especially in automotive and manufacturing sectors. Sizes like 20mm, 25mm, and 50mm square tubes are common.

Stainless Steel Box

Stainless steel box is another term often used interchangeably with square tubing. It refers to square or rectangular hollow sections made of stainless steel, commonly used in fabrication, ornamental works, and support structures. Stainless steel box sections are preferred for their sleek appearance, rigidity, and resistance to rust and chemicals. Available in similar grades like 304 and 316, these box tubes are widely used in railings, gates, structural posts, and industrial enclosures.

Pricing Information

Prices vary based on grade, wall thickness, and market conditions. Below is a general overview:

• 1/2 stainless steel tubing (20 ft): $80 – $120
• 1 1/2 square tubing 20 ft price: $150 – $200
• 1 1/4 stainless steel tubing: $110 – $160
• 3×3 square tubing 20 ft price: $280 – $400
• 2 inch stainless steel tubing: $180 – $250
• 1 2 stainless steel tubing (1/2 inch): Same as 1/2 SS tubing above

Note: Prices are indicative and can fluctuate based on stainless steel market rates, finishing, and custom requirements.

Applications of Stainless Square Tubing

• Handrails and support posts
• Frames for furniture or industrial machines
• Construction and infrastructure supports
• Chemical and food-grade process piping
• Sanitary tubing in pharmaceutical and dairy industries

Where to Buy: Stainless Steel Tube Suppliers

Looking for reliable stainless steel tube suppliers? Consider the following:

• Local metal service centers
• Authorized distributors of brands like Jindal, Outokumpu, POSCO
• Online industrial supply platforms (IndiaMART, MetalsDepot, etc.)
• Direct from manufacturers for bulk or custom orders

Make sure to verify certifications such as ISO, ASTM compliance, and test certificates before bulk purchasing.

Final Thoughts

Whether you need 1/2 stainless steel tubing for a small home project or 3×3 square tubing in bulk for industrial use, stainless steel square tubes provide long-lasting performance, easy fabrication, and excellent corrosion resistance.

Understanding the square tube specification, available sizes, and market pricing helps ensure you select the right product for your application. For optimal quality and value, always choose certified suppliers with industry experience.

Frequently Asked Questions (FAQs)

Q1: What sizes does stainless steel square tubing come in?

A: Stainless steel square tubing comes in a variety of sizes, typically ranging from 1/2 inch to 3×3 inches or more. Common lengths include 20 ft, and custom sizes are also available upon request.

Q2: What is the price of 3×3 stainless steel square tubing (20 ft)?

A: The price for 3×3 stainless steel square tubing (20 ft) generally ranges from ₹22,000 to ₹33,000 ($280 to $400), depending on grade, wall thickness, and supplier.

Q3: What are the common grades used in stainless steel square tubing?

A: The most widely used grades are 304 and 316 stainless steel. 304 is suitable for most general applications, while 316 is used in highly corrosive environments such as marine and chemical processing.

Q4: What standards are followed for stainless steel square tubes?

A: Common standards include ASTM A554, ASTM A312, and ASTM A269. These ensure quality, strength, and corrosion resistance suitable for structural and mechanical applications.

Q5: Can I use stainless steel square tubing for food and pharma industries?

A: Yes, stainless square tubing—especially in grades 304L and 316L—is commonly used in food, dairy, and pharmaceutical industries due to its sanitary properties and corrosion resistance.

Q6: Where can I buy stainless steel square tubing in India?

A: You can purchase from local metal service centers, authorized distributors of brands like Mahadev Dairy Pharma Fittings, Jindal or online platforms like IndiaMART and TradeIndia. Ensure the supplier provides ISO and ASTM-compliant materials.

Q7: What finishing options are available for stainless square tubes?

A: Stainless steel square tubing is available in finishes like mill finish, brushed finish, and mirror polish depending on application—decorative or structural.

Q8: What is ASTM A554 specification used for?

A: ASTM A554 covers welded stainless steel tubing used for mechanical and structural purposes, especially in ornamental and architectural applications.