Shanxi Zhongcheng Metal Co., Ltd.
| Payment Terms | T/T，D/P，D/A，Western Union，PayPal |
| Supply Ability | 10000tons |
| Delivery Time | 15-25days |
| Packaging Details | Wooden pallets, wooden crates, woven bags, etc. |
| Country of Origin | MADE IN CHAINA |
| Brand | Baosteel，TISCO |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available |
| Grade | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH) |
| MOQ | 100kg |
| Packaging | Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag |
| Supply Capacity | 10000tons |
| Brand Name | Baosteel，TISCO |
| Model Number | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 |
| Certification | EN 10204 Type 3.1 / 3.2 available |
| Place of Origin | MADE IN CHAINA |
View Detail Information
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Product Specification
| Payment Terms | T/T，D/P，D/A，Western Union，PayPal | Supply Ability | 10000tons |
| Delivery Time | 15-25days | Packaging Details | Wooden pallets, wooden crates, woven bags, etc. |
| Country of Origin | MADE IN CHAINA | Brand | Baosteel，TISCO |
| Certifications | ISO/EN 10204 Type 3.1 / 3.2 available | Grade | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH) |
| MOQ | 100kg | Packaging | Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag |
| Supply Capacity | 10000tons | Brand Name | Baosteel，TISCO |
| Model Number | 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 | Certification | EN 10204 Type 3.1 / 3.2 available |
| Place of Origin | MADE IN CHAINA | ||
| High Light | ASTM A500 Stainless Steel Square Pipe ，Stainless Steel Square Pipe Grade B ，Structural Square Hollow Section | ||
ASTM A500 is the American standard for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. It is the go-to specification for structural applications where strength, weldability, and economy are required.
Square steel tubes under ASTM A500 are produced as cold-formed welded tubes, then heat-treated to remove internal stresses and improve mechanical properties. The standard covers four grades: A, B, C, and D – with Grade B and Grade C being the most commonly used.
| Quick Facts | Value |
|---|---|
| Standard | ASTM A500 |
| Shape | Square |
| Process | Cold-formed + welded + heat treated |
| Key Feature | High strength-to-weight ratio |
| Primary Use | Structural framing, columns, trusses |
| Common Grades | Grade B, Grade C |
ASTM A500 specifies chemical requirements for each grade. Below are the limits per the standard.
| Element | Grade A | Grade B | Grade C | Grade D |
|---|---|---|---|---|
| Carbon (C) | ≤ 0.26 | ≤ 0.26 | ≤ 0.23 | ≤ 0.27 |
| Manganese (Mn) | ≤ 1.35 | ≤ 1.35 | ≤ 1.35 | ≤ 1.40 |
| Phosphorus (P) | ≤ 0.035 | ≤ 0.035 | ≤ 0.035 | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 | ≤ 0.035 | ≤ 0.035 | ≤ 0.035 |
| Copper (Cu) | ≥ 0.20 (when specified) | ≥ 0.20 (when specified) | ≥ 0.20 (when specified) | ≥ 0.20 (when specified) |
Notes:
Grade Selection Guide:
| Grade | Strength Level | Typical Use |
|---|---|---|
| Grade A | Lowest | Light structural, non-critical applications |
| Grade B | Medium (most common) | General structural framing, columns, braces |
| Grade C | Highest | Heavy structural, high-load applications |
| Grade D | High + improved weldability | Cold-temperature and welded structures |
ASTM A500 specifies minimum mechanical properties that vary by grade and tube wall thickness.
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| Grade A | ≥ 310 | ≥ 230 | ≥ 25 |
| Grade B | ≥ 400 | ≥ 315 | ≥ 23 |
| Grade C | ≥ 425 | ≥ 345 | ≥ 21 |
| Grade D | ≥ 400 | ≥ 250 | ≥ 23 |
Elongation requirements apply to 50 mm (2 inches) gauge length. Actual values vary by wall thickness – thinner walls may have lower elongation.
| Grade | Strength | Weldability | Cost | Best For |
|---|---|---|---|---|
| B | Medium | Excellent | Low | General construction (most popular) |
| C | High | Good | Medium | Heavy structural, high-load frames |
| D | Medium-High | Excellent (low CE) | Medium | Cold-temperature welded structures |
| A | Low | Excellent | Lowest | Light-duty, non-critical |
| Parameter | Typical Tolerance |
|---|---|
| Outside dimensions | ± 0.5 mm to ± 1.0 mm (size dependent) |
| Wall thickness | ± 10% |
| Straightness | ≤ 1/8" per 5' (≈ 2.0 mm per meter) |
| Twist | ≤ 2° + 0.5° per meter |
| Corner radius | 2× to 3× wall thickness (typical) |
| Size (mm) | Common Wall Thickness (mm) |
|---|---|
| 20 × 20 | 1.5, 2.0 |
| 40 × 40 | 2.0, 2.5, 3.0 |
| 50 × 50 | 2.5, 3.0, 4.0 |
| 80 × 80 | 3.0, 4.0, 5.0 |
| 100 × 100 | 3.0, 4.0, 5.0, 6.0 |
| 150 × 150 | 4.5, 5.0, 6.0, 8.0 |
| 200 × 200 | 6.0, 8.0, 10.0 |
Custom sizes available upon request.
Primary Use: Structural framing and building construction
Other Applications:
Quick Pick:
| Need | Choose |
|---|---|
| General building construction | ASTM A500 Grade B |
| Heavy structural/high load | ASTM A500 Grade C |
| Cold-temperature welded structures | ASTM A500 Grade D |
| Light-duty / non-critical | ASTM A500 Grade A |
Every ASTM A500 square tube we supply meets strict quality standards.
| Test | Purpose |
|---|---|
| Chemical analysis | Verify composition per standard |
| Tensile test | Confirm yield and tensile strength |
| Flattening test | Assess ductility and weld quality |
| Reverse flattening test | Check weld soundness |
| Hydrostatic test | (When specified) – not typically required for structural |
| Dimensional inspection | Verify OD, wall thickness, straightness, twist |
| Visual inspection | Check surface defects and weld appearance |
| Advantage | Detail |
|---|---|
| Stock availability | Common sizes in stock |
| Custom cutting | Cut to exact lengths |
| Fabrication services | Drilling, welding, and painting are available |
| Competitive pricing | Direct from the mill |
| Global shipping | Door-to-door delivery |
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Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
20000000-50000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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