S355J2H Hollow Tubes
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S355J2H + E355+N is a dual-specified high-strength structural steel that combines the properties of two grades: S355J2H and E355+N. S355J2H is a low-alloy steel known for its excellent weldability, high toughness, and strength, with a minimum yield strength of 355 MPa and impact testing at -20°C. E355+N, on the other hand, is a normalized steel grade that provides enhanced mechanical consistency and reliability due to the normalization process. This dual-spec material is highly versatile and suitable for a wide range of applications, including construction, mechanical parts, and pressure vessels, where both structural integrity and mechanical performance are critical.
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| Property | Specification |
|---|---|
| Standard | EN 10210 (S355J2H), EN 10297-1 (E355+N) |
| Chemical Composition | C: ≤ 0.22%, Mn: ≤ 1.60%, P: ≤ 0.025%, S: ≤ 0.025%, Si: ≤ 0.55% (Combined from both specifications) |
| Tensile Strength (MPa) | 470 - 630 MPa (S355J2H), 490 - 630 MPa (E355+N) |
| Yield Strength (MPa) | 355 MPa (minimum) |
| Elongation (%) | 20-22% (depending on thickness and condition) |
| Impact Strength | 27 J at -20°C (S355J2H) |
| Hardness (HBW) | Approx. 146-187 HB |
| Modulus of Elasticity (GPa) | 210 GPa |
| Density (g/cm³) | 7.85 g/cm³ |
| Thermal Conductivity (W/m·K) | 50 W/m·K (at 20°C) |
| Specific Heat Capacity (J/kg·K) | 480 J/kg·K (at 20°C) |
| Heat Treatment | Normalized (E355+N), as-delivered (S355J2H) |
| Applications | Structural components, mechanical parts, pressure vessels, offshore structures |
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