Hot Products
High Quality Carbon Steel Square & Rectangular Pipe from China Suppliers & Factory - 50,000 TONS in Stock
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 sizes are in stock and can be shipped immediately.
Q: What steel grades and standards do you supply?
A: We offer square and rectangular pipes in various grades including ASTM A500, EN10025, S235JR, S355JR, A36, Q235, Q355, and SS400.
Q: Do you offer customization and processing services?
A: Yes, we support customizable lengths from 4m to 12m and provide services such as punching, painting, galvanizing, cutting, and welding.
Contact Us
ED Director
Allen Cao
Sales Manager
Razvan Zhang
Sales Manager
Sales Supervisor
Ella Zhang
Sales Supervisor
Lloyd Chen
Sales Supervisor
Muller Wang
Sales Supervisor
Finn Zhao
Sales Supervisor
Sun Yin
Sales Supervisor
Anna Yang
Sales Supervisor