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Black Surface S355JR Grade Square Steel Pipe 30*30-300*300mm Hollow Welded Steel Pipe
Product Details
| Section Shape | Square | Surface Treatment | Black |
|---|---|---|---|
| Size Range | 10mm*10mm - 1000mm*1000mm | Thickness Range | 1.2mm - 30.0mm |
| Material Grades | Q195, Q215, Q235, Q345 | 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% |
| Manganese Content | ≤1.60% | Phosphorus Content | ≤0.035% (S355JR) |
| Sulfur Content | ≤0.035% (S355JR) | Copper Content | ≤0.55% |
| Production Capacity | 10,000MT/month | ||
| Highlight | Black Surface Square Steel Pipe,S355JR Grade Hollow Steel Pipe,30*30-300*300mm Welded Steel Pipe |
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Product Description
Steel Pipe Standards: EN10210, EN10219, ASTM A500 MS SHS
Available in sizes 15×15mm to 600×600mm with thickness range of 1.0-30mm
Product Overview
Square pipe hollow black iron S275JR welded square steel pipe manufactured to international standards for structural applications.
Product Specifications
Square Pipe: 10mm×10mm - 1000mm×1000mm | Thickness: 1.2mm - 30.0mm
Round Pipe: OD 310mm - 1000mm | Thickness: 4mm - 30mm | Custom lengths available
Rectangle Pipe: 20mm×40mm - 400mm×700mm | Thickness: 1.2mm - 30.0mm
L/T/Z Window Section: 28mm/38mm | Thickness: 0.5mm - 1.5mm
Material & Specifications
Materials: Q195, Q215, Q235, Q345 and equivalent grades
Surface Treatment: Black or bright finish, painted or oiled
Packing: Export standard packing (bundles, seaworthy package, container shipment)
Delivery Port: Shanghai, China
Lead Time: Within 30 days after receiving original L/C or deposit
MOQ: 10 Tons per size
Production Capacity: 10,000MT per month
Applications
Widely used in structural applications, motorbike and automobile manufacturing, ornamental uses, medical equipment, sports equipment, and home furniture.
Main Markets
Europe, America, Africa, Southeast Asia
EN 10025 S355 Steel Specifications
S355 steel is a European standard structural steel grade according to EN 10025-2:2004, offering superior properties compared to S235 and S275 steels in yield strength and tensile strength.
S355 Steel Grade Designations
- S355JR (1.0045): Minimum impact energy 27J at 20°C
- S355J0 (1.0553): Minimum impact energy 27J at 0°C
- S355J2 (1.0577): Minimum impact energy 27J at -20°C
- S355K2 (1.0596): Minimum impact energy 40J at -20°C
Technical Data Sheets
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cu (%) | N (%) | Deoxidation |
|---|---|---|---|---|---|---|---|---|
| S355JR | ≤0.24 | ≤0.55 | ≤1.60 | ≤0.035 | ≤0.035 | ≤0.55 | ≤0.012 | Rimmed steel not allowed |
| S355J0 | ≤0.20 | ≤0.55 | ≤1.60 | ≤0.030 | ≤0.030 | ≤0.55 | ≤0.012 | - |
| 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 |
Mechanical Properties - Yield Strength (≥ N/mm²)
| 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 |
Tensile Strength (N/mm²)
| Thickness Range | d < 3mm | 3 ≤ d ≤ 100mm | 100 < d ≤ 250mm |
|---|---|---|---|
| S355JR | 510-680 | 470-630 | 450-600 |
Elongation (≥ %)
| Thickness Range | 3 ≤ d ≤ 40mm | 40 < d ≤ 63mm | 63 < d ≤ 100mm | 100 < d ≤ 150mm | 150 < d ≤ 250mm |
|---|---|---|---|---|---|
| S355JR | 22 | 21 | 20 | 18 | 17 |
| S355K2 | 20 | 19 | 18 | 18 | 17 |
Product Gallery
Welcome to contact us for quotations and technical specifications. We serve both new and existing customers with premium quality steel pipes.
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