S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5
S355J0WP Weather Resistant Steel Plate | EN 10155 | Corrosion-Resistant Structural Steel
Detailed data sheet for S355J0WP weather resistant steel plate conforming to EN 10155. Chemical composition, mechanical properties, thermal and electrical physical properties, international equivalents and applications.
Welding, hot forming, cold forming (limited), drilling, cutting, bolting
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S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Introduction
S355J0WP is a structural weathering steel defined in the European standard EN 10155 (now superseded by EN 10025-5). It offers improved atmospheric corrosion resistance compared to standard carbon steels due to the controlled addition of alloying elements such as copper, chromium, and nickel, along with a higher phosphorus content. The designation indicates a minimum yield strength of 355 MPa, longitudinal Charpy V-notch impact energy of 27 J at 0 °C (J0), and enhanced weather resistance (W) with elevated phosphorus (P).
This steel forms a protective, self-adhering patina when exposed to alternating wet and dry cycles, eliminating the need for painting in many applications. It is typically supplied in the hot-rolled condition and is widely used in structural and architectural applications where both strength and corrosion resistance are required.
S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Chemical Composition
Ladle analysis specified in EN 10155 for S355J0WP. The enhanced phosphorus content, together with chromium and copper, promotes the formation of the protective patina. Nickel and molybdenum may be added in small amounts to further improve corrosion resistance. Note: The standard has been superseded by EN 10025-5, but the compositional limits remain identical.
| 元素 | 标准值 | 备注说明 |
|---|---|---|
| Carbon (C) | ≤ 0.12 | |
| Silicon (Si) | ≤ 0.75 | |
| Manganese (Mn) | ≤ 1.00 | |
| Phosphorus (P) | 0.06 - 0.15 | Intentional addition for weather resistance |
| Sulfur (S) | ≤ 0.035 | |
| Chromium (Cr) | 0.30 - 1.25 | |
| Copper (Cu) | 0.25 - 0.55 | |
| Nickel (Ni) | ≤ 0.65 | |
| Molybdenum (Mo) | ≤ 0.30 | Optional, to be agreed at the time of order |
| Zirconium (Zr) | ≤ 0.15 | Optional, to be agreed |
| Aluminium (Al) | ≥ 0.020 | Total aluminium, required for fine grain practice |
| Nitrogen (N) | ≤ 0.009 | Maximum for aluminium-killed steels |
S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Thermal and Electrical Physical Properties
Physical properties of weathering steel grade S355J0WP at room temperature and elevated temperatures based on typical values for low-alloy structural steel. These values are not mandatory requirements of EN 10155 but are used for engineering calculations.
| 性能项目 | 标准要求值 | 单位 | 测试条件 |
|---|---|---|---|
| 密度 (ρ) | 7.85 | g/cm³ | 20 °C |
| 弹性模量 (E) | 210 | GPa | 20 °C |
| 切变模量 (G) | 81 | GPa | 20 °C |
| 泊松比 (ν) | 0.3 | - | 20 °C |
| 热膨胀系数 (α) | 12.0 × 10⁻⁶ | K⁻¹ | 20 °C to 100 °C |
| 热膨胀系数 (α) | 12.5 × 10⁻⁶ | K⁻¹ | 20 °C to 200 °C |
| 热膨胀系数 (α) | 13.0 × 10⁻⁶ | K⁻¹ | 20 °C to 300 °C |
| 热导率 (λ) | 42 | W/(m·K) | 20 °C |
| 热导率 (λ) | 41 | W/(m·K) | 100 °C |
| 比热容 | 460 | J/(kg·K) | 20 °C |
| 电阻率 (ρ_e) | 0.25 - 0.35 | µΩ·m | 20 °C |
S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Mechanical Properties
Mechanical properties at room temperature as specified in EN 10155 / EN 10025-5 for hot-rolled S355J0WP. Properties are thickness-dependent; values apply for thicknesses up to 16 mm unless otherwise noted.
- Impact testing (Charpy V-notch) is performed on longitudinal specimens at 0 °C.
- Bending tests are carried out with a mandrel diameter related to the specimen thickness (t).
| 性能项目 | 标准要求值 | 单位 | 测试条件 |
|---|---|---|---|
| 屈服强度 (ReH) | 355 | MPa | Thickness ≤ 16 mm |
| 屈服强度 (ReH) | 345 | MPa | Thickness > 16 mm ≤ 40 mm |
| 屈服强度 (ReH) | 335 | MPa | Thickness > 40 mm ≤ 63 mm |
| 屈服强度 (ReH) | 325 | MPa | Thickness > 63 mm ≤ 80 mm |
| 抗拉强度 (Rm) | 470 - 630 | MPa | Thickness ≤ 100 mm |
| 断后伸长率 (A) | 22 | % | Gauge length L₀ = 5.65√S₀, longitudinal |
| 断后伸长率 (A) | 22 | % | Thickness ≤ 16 mm |
| 断后伸长率 (A) | 22 | % | Thickness > 16 mm ≤ 40 mm |
| 断后伸长率 (A) | 21 | % | Thickness > 40 mm ≤ 63 mm |
| 断后伸长率 (A) | 20 | % | Thickness > 63 mm ≤ 100 mm |
| 冲击功 (KV) | 27 | J | 0 °C, longitudinal, 10x10 mm specimen |
| 弯曲试验 (弯心直径) | 1.0 t (longitudinal); 1.5 t (transverse) | t = specimen thickness, 180° bend | |
| 弯曲试验 (弯心直径) | 1.5 t (longitudinal); 2.0 t (transverse) | Thickness > 12 mm, for transverse samples |
S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Completely Equivalent Material Standards and Replaceable Grades
| 国家/地区 | 执行标准 | 牌号 | 备注说明 |
|---|---|---|---|
| European Union | EN 10025-5:2019 | S355J0WP | Replacement for EN 10155; identical composition and properties |
| International | ISO 4952:2006 | E 355 W (Fe 510 A1W) | Closest ISO weathering steel with yield 355 MPa and similar chemistry, but not identical in all deoxidisation requirements |
| France | NF A35-502 | S355J0WP | National adoption; identical to EN 10155 |
S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Application Introduction
S355J0WP is a specialised structural steel designed for unpainted applications in outdoor environments. The protective patina develops over time under natural weathering cycles. It is not recommended for immersion in water, burial, or continuous-wet conditions without additional protection. For welded structures, matching weathering steel consumables are required to maintain corrosion resistance at welds. The steel can be supplied with a factory-applied pre-patina treatment to accelerate the stable oxide layer formation.
Product Applications: Built-up bridge girders and box sections, Exposed architectural screens and façades, Lighting poles and high-mast towers, Shipping and storage containers (Corten B equivalent), Sculptures and landscape installations
Processed into products: Bridge bearing stiffeners and web plates, Welded beams and columns in open car parks, Bolted or riveted structural frameworks, Cold-formed purlins for building envelopes, Plasma-cut intricate decorative panels
Application industries: Bridge and highway engineering, Architecture and building (structural frames, cladding), Rolling stock and railway infrastructure, Container manufacturing, Power transmission towers, Industrial chimneys and ducting
S355J0WP Weather Resistant Steel Plate per EN 10155 / EN 10025-5 Similar or Alternative Weathering Steel Recommendations
| 国家/地区 | 执行标准 | 牌号 | 备注说明 |
|---|---|---|---|
| European Union | EN 10025-5 | S355J2WP | Higher impact energy at -20 °C (J2), otherwise similar strength and weather resistance |
| European Union | EN 10025-5 | S355J0W | Similar strength, but with lower phosphorus (≤0.04 %), slightly different corrosion characteristics, often used for thicker sections |
| European Union | EN 10025-5 | S355K2WP | Higher strength impact grade (K2: 40 J at -20 °C), finer grain, suitable for demanding structural applications |
| USA | ASTM A588/A588M | Grade A | Widely used weathering steel with comparable yield strength (345 MPa) and atmospheric corrosion resistance; not identical in composition but often used interchangeably after engineering assessment |
| Japan | JIS G 3114 | SMA490AW | Weathering steel with min yield strength 365 MPa, similar application range, but requires individual case review for substitution |
| China | GB/T 4171 | Q355NH | Chinese weathering steel with similar mechanical properties and chemistry; Cu-Cr-Ni-P alloy system; may be considered for cross-referencing |
Notes:
Delivery options: plates up to 3 m wide and up to 150 mm thick can be sourced. Welding consumables: Use electrodes such as E NiCu-7 for SMAW or matching wires of AWS A5.28 ER80S-G type to retain corrosion resistance.
Note on design: For alternating wet-dry exposure, drainage and avoidance of crevices are critical to ensure stable patina formation. The steel is not intended for use in continuously moist environments or in contact with soils/water without protective coatings. Certification: EN 10204 type 3.1 or 3.2 inspection certificates are normally supplied.
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