JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
| Section Shape | Square |
| Size Range | 40*40 - 500*500 |
| Thickness Range | 1.2mm - 30.0mm |
| Material Grades | SS400, S235JR, S275JR, S355JR, 1020, 1045, 4140 |
| Surface Treatment | Black, galvanized or painted |
| Yield Strength | 355 N/mm² (≤16mm) |
| Tensile Strength | 510-680 N/mm² (d<3mm) |
| Elongation | 22% (3≤d≤40mm) |
| Carbon Content | ≤0.24% (S355JR) |
| Silicon Content | ≤0.55% (S355JR) |
| Manganese Content | ≤1.60% (S355JR) |
| Phosphorus Content | ≤0.035% (S355JR) |
| Sulfur Content | ≤0.035% (S355JR) |
| Copper Content | ≤0.55% (S355JR) |
| Production Capacity | 10,000MT/month |
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Product Specification
| Section Shape | Square | Size Range | 40*40 - 500*500 |
| Thickness Range | 1.2mm - 30.0mm | Material Grades | SS400, S235JR, S275JR, S355JR, 1020, 1045, 4140 |
| Surface Treatment | Black, galvanized or painted | Yield Strength | 355 N/mm² (≤16mm) |
| Tensile Strength | 510-680 N/mm² (d<3mm) | Elongation | 22% (3≤d≤40mm) |
| Carbon Content | ≤0.24% (S355JR) | Silicon Content | ≤0.55% (S355JR) |
| Manganese Content | ≤1.60% (S355JR) | Phosphorus Content | ≤0.035% (S355JR) |
| Sulfur Content | ≤0.035% (S355JR) | Copper Content | ≤0.55% (S355JR) |
| Production Capacity | 10,000MT/month | ||
| High Light | S235JR S355JR Square Tube ，Black Surface Treatment Square Tube ，40*40 - 500*500 Square Steel Tube | ||
Available in stock sizes ranging from 40×40mm to 500×500mm with comprehensive material options and surface treatments.
| Product Type | Size Range | Thickness | Length |
|---|---|---|---|
| Round Pipe | OD 10mm - 1000mm | 4mm - 30mm | Custom lengths available |
| Square Pipe | 10×10mm - 1000×1000mm | 1.2mm - 30.0mm | Standard and custom |
| Rectangle Pipe | 20×40mm - 400×700mm | 1.2mm - 30.0mm | Standard and custom |
| L/T/Z Window Section | 28mm/38mm | 0.5mm - 1.5mm | Standard profiles |
SS400, S235JR, S275JR, S355JR, 1020, 1045, 4140, and equivalent standards
Black, galvanized, or painted finishes available
Export standard packing with bundles, seaworthy packaging, container shipment
Port: Shanghai, China
Lead Time: Within 30 days after deposit/L/C
S355 structural steel offers superior mechanical properties compared to S235 and S275 grades, with enhanced yield strength and tensile strength characteristics.
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cu (%) | Deoxidation |
|---|---|---|---|---|---|---|---|
| S355JR | ≤0.24 | ≤0.55 | ≤1.60 | ≤0.035 | ≤0.035 | ≤0.55 | Rimmed steel not allowed |
| S355J0 | ≤0.20 | ≤0.55 | ≤1.60 | ≤0.030 | ≤0.030 | ≤0.55 | - |
| S355J2 | ≤0.20 | ≤0.55 | ≤1.60 | ≤0.025 | ≤0.025 | ≤0.55 | Fully killed |
| S355K2 | ≤0.20 | ≤0.55 | ≤1.60 | ≤0.025 | ≤0.025 | ≤0.55 | Fully killed |
| Thickness (mm) | d≤16 | 16< d ≤40 | 40< d ≤63 | 63< d ≤80 | 80< d ≤100 | 100< d ≤150 | 150< d ≤200 | 200< d ≤250 |
|---|---|---|---|---|---|---|---|---|
| S355 Grades | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 |
| Thickness (mm) | d<3 | 3 ≤ d ≤ 100 | 100 < d ≤ 250 |
|---|---|---|---|
| S355JR | 510-680 | 470-630 | 450-600 |
| Thickness (mm) | 3≤d≤40 | 40< d ≤63 | 63< d ≤100 | 100< d ≤150 | 150< d ≤250 |
|---|---|---|---|---|---|
| S355JR | 22 | 21 | 20 | 18 | 17 |
| S355K2 | 20 | 19 | 18 | 18 | 17 |
Our square tubes are widely used in structural applications across multiple industries:
Steel structures, large venues, exhibition centers, bridge supports, airport construction
Lifting machinery, storage shelves, mining support, three-dimensional garages
Shipbuilding, railway vehicles, vehicle manufacturing, transportation facilities
Wind power equipment, medical equipment, sport equipment, home furniture, ornamental uses
Strategic partnerships with steel manufacturers ensure lowest market prices while maintaining strong financial stability and diversified operations.
Professional quality control from procurement to sales with comprehensive auditing and reliable steel mill quality tracking.
24-hour distribution services via multiple transport methods with simplified ordering processes and comprehensive product range.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
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