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304 Seamless Stainless Steel Square Pipe - High-Quality China Suppliers & Factory Solutions for Durability and Style
Product Details
These square pipes are super versatile—they're used in everything from construction and auto framing to furniture and industrial equipment. Plus, all of our products meet international standards like ASTM A554 and EN 10296-2.
If you're thinking about your next project where strength and style really matter, go for our square pipes. Give us a shout today—ask about custom sizes or get a great deal on pricing. We're here to help you get exactly what you need!
Available Grades
| Austenitic Stainless Steel | 201, 301, 304, 305, 310, 314, 316, 321, 347, 370, etc |
| Martensitic Stainless Steel | 410, 414, 416, 416, 420, 431, 440A, 440B, 440C, etc |
| Duplex Stainless Steel | S31803, S32101, S32205, S32304, S32750, etc |
| Ferritic Stainless Steel | 429, 430, 433, 434, 435, 436, 439, etc |
Product Specification
| Standard | ASTM A213, A312, ASTM A269, ASTM A778, ASTM A789, DIN 17456, DIN17457, DIN 17459, JIS G3459, JIS G3463, GOST9941, EN10216, BS3605, GB13296 |
| Material | 304, 304L, 309S, 310S, 316, 316Ti, 317, 317L, 321, 347, 347H, 304N, 316L, 316N, 201, 202 |
| Surface | Polishing, annealing, pickling, bright |
| Type | Hot rolled and cold rolled |
| Size | Wall thickness: 1mm – 150mm Outer diameter: 6mm – 2500mm |
| Delivery Time | Prompt delivery or as the order quantity. |
| Package | Standard export seaworthy package, or as required. |
| Application | Widely used in petroleum, food, chemical industry, construction, electric power, nuclear energy, energy, machinery, biology, paper making, shipbuilding and boilers. Pipes can also be made according to customer requirements. |
| Container Size |
20ft GP: 5898mm (L) × 2352mm (W) × 2393mm (H) — 24–26 CBM 40ft GP: 12032mm (L) × 2352mm (W) × 2393mm (H) — 54 CBM 40ft HC: 12032mm (L) × 2352mm (W) × 2698mm (H) — 68 CBM |
Chemical Composition Table
| Chemical Component (%) | |||||||
| Grade ASTM | C | Si | Mn | S | P | Cr | Ni |
| 201 | ≤0.15 | ≤0.75 | 5.50–7.50 | ≤0.030 | ≤0.060 | 16.00–18.00 | 3.50–5.50 |
| 304 | ≤0.07 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 17.00–19.00 | 8.00–11.00 |
| 304L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 18.00–20.00 | 8.00–12.00 |
| 309S | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 22.00–24.00 | 12.00–15.00 |
| 310S | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 24.00–26.00 | 19.00–22.00 |
| 316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 16.00–18.00 | 10.00–14.00 |
| 316L | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.035 | 16.00–18.00 | 12.00–15.00 |
Frequently Asked Questions
Q What stainless steel grades are available for your square pipes?
We offer a wide range of stainless steel grades including Austenitic (201, 304, 316, etc.), Martensitic (410, 420, 440C, etc.), Duplex (S31803, S32205, S32750, etc.), and Ferritic (430, 436, 439, etc.) types to suit various application requirements.
Q What international standards do your square pipes comply with?
Our square pipes meet multiple international standards including ASTM A213, ASTM A312, ASTM A269, ASTM A778, DIN 17456, JIS G3459, EN10216, BS3605, and GB13296, ensuring quality and reliability for global markets.
Q What size range is available for the square pipes?
We supply square pipes with wall thickness ranging from 1mm to 150mm and outer diameter from 6mm to 2500mm. Custom sizes are also available based on your specific project requirements.
Q What surface finishes are offered for the square pipes?
We provide multiple surface treatment options including polishing, annealing, pickling, and bright finish. The right surface finish can be selected based on your application environment and aesthetic needs.
Q What are the main application fields for these stainless steel square pipes?
These pipes are widely used across industries including petroleum, food processing, chemical industry, construction, electric power, nuclear energy, machinery, biology, paper making, shipbuilding, and boiler manufacturing.
Q How are the products packaged and shipped?
All products are packed using standard export seaworthy packaging to ensure safe transit. We support shipping via 20ft GP, 40ft GP, and 40ft HC containers. Custom packaging can also be arranged based on your order requirements.