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High Quality China Suppliers for Carbon Steel Square & Rectangular Pipe - Factory Stock of 50,000 TONS
Specifications
Grade: ASTM A500, EN10025, S235JR, S355JR, A36, Q235, Q355, SS400
Size: 25x25-500x500mm, as per customer's requirement
Surface treatment: Black
Length: 4-12m, customizable
Packing: Standard sea-worthy packing
Service: Punching, painting, galvanizing, cutting, welding, etc.
| SIZE (MM) | THICKNESS (MM) | SIZE (MM) | THICKNESS (MM) |
|---|---|---|---|
| 25x25 | 1.5-2.5 | 25x50 | 1.7-4.0 |
| 30x30 | 1.5-2.8 | 30x50 | 1.7-4.0 |
| 40x40 | 1.7-4.0 | 30x60 | 1.7-5.0 |
| 50x50 | 1.7-5.0 | 40x50 | 1.7-5.0 |
| 60x60 | 1.8-6.0 | 40x60 | 1.7-5.0 |
| 70x70 | 1.8-6.0 | 40x80 | 1.8-6.0 |
| 75x75 | 1.8-6.0 | 50x100 | 1.8-6.0 |
| 80x80 | 1.8-6.0 | 60x120 | 2.0-6.0 |
| 90x90 | 2.0-6.0 | 50x150 | 2.2-8.0 |
| 100x100 | 2.2-8.0 | 75x125 | 2.2-8.0 |
| 120x120 | 4.0-12.0 | 80x120 | 2.2-8.0 |
| 150x150 | 2.75-12.0 | 80x160 | 4.0-12.0 |
| 160x160 | 4.0-12.0 | 100x200 | 2.75-12.0 |
| 200x200 | 4.0-12.0 | 150x200 | 4.0-12.0 |
| 250x250 | 4.0-12.0 | 150x250 | 4.0-12.0 |
| 300x300 | 5.75-12.0 | 100x300 | 4.0-12.0 |
| 400x400 | 6.0-12.0 | 200x400 | 4.0-12.0 |
| ASTM A500 Square & Rectangular Pipe - Chemical Composition by Grade | ||
| Element | Grade B (%) | Grade C (%) |
| Carbon (C) | 0.26 max | 0.26 max |
| Manganese (Mn) | 1.20 max | 1.20 max |
| Phosphorus (P) | 0.035 max | 0.035 max |
| Sulfur (S) | 0.035 max | 0.035 max |
| Silicon (Si) | 0.15–0.40 | 0.15–0.40 |
| Copper (Cu) | 0.20 max (opt.) | 0.20 max (opt.) |
| Nickel (Ni) | 0.30 max (opt.) | 0.30 max (opt.) |
| Chromium (Cr) | 0.30 max (opt.) | 0.30 max (opt.) |
| ASTM A500 Square & Rectangular Pipe - Mechanical Properties | ||
| Property | Grade B | Grade C |
| Yield Strength (MPa/ksi) | 290 MPa/42 ksi | 317 MPa/46 ksi |
| Tensile Strength (MPa/ksi) | 414-534 MPa/60-77 ksi | 450-565 MPa/65-82 ksi |
| Elongation (%) | 20% min | 18% min |
| Bend Test | Pass 180° | Pass 180° |
Product Display
Steel pipe production line
Steel pipe warehouse
Steel pipe oiling
Steel pipe PVC packaging
Loaded into container
Transported to the port
In the port yard
Shipping process
Free quality inspection report
Exhibition
Company Certificate
CE
ISO14001:2015
ISO9001:2015
Alliance Member OF Tianjin Metal Materials Industry Association
Alliance of China Steel Export
China National Association of Metal Material Trade
FAQ
Q: Are you a manufacturer?
A: Absolutely. We are a direct manufacturer with our own large-scale facility located in Tianjin, China. You are more than welcome to visit us!
Q: Can I place a trial order for just a few tons?
A: Certainly. We value every partner regardless of the order size. We can easily arrange an LCL (Less than Container Load) shipment to accommodate your specific needs.
Q: Is the sample free of charge?
A: Yes, we provide samples for free so you can verify our quality. We only ask the buyer to cover the courier cost.
Q: How long is the delivery time?
A: Most standard sizes are kept in stock and can be processed for shipping immediately.
Q: What processing services do you offer?
A: We provide custom processing services including punching, painting, galvanizing, cutting, and welding to meet your specific project requirements.
Q: What specifications and standards can you supply?
A: We supply steel pipes conforming to ASTM A500, EN10025, S235JR, S355JR, A36, Q235, Q355, and SS400 standards, with sizes ranging from 25x25mm to 500x500mm.
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