S355jow
S355JOW steel plate is a weather-resistant structural steel designed for outdoor environments. Its copper, 铬, and nickel alloying elements enable the formation of a protective rust layer that significantly improves atmospheric corrosion resistance. It is widely used in bridges, building structures, 交通系统, and outdoor engineering projects where durability and low maintenance are required.
- 描述
S355JOW is a low-alloy structural weather-resistant steel grade designed for outdoor and atmospheric exposure environments. It belongs to the EN 10025-5 weathering steel family and is engineered to form a stable protective rust layer (铜绿) that reduces further corrosion without the need for painting in many applications.
Compared with standard structural steels like S235 or S355JR, S355JOW offers significantly improved corrosion resistance in atmospheric conditions.
Chemical Composition of S355JOW Steel Plate
The corrosion resistance of S355JOW is achieved by adding alloying elements such as copper, 铬, 镍, 和磷.
| 元素 | 内容 (%) |
|---|---|
| 碳 (C) | ≤ 0.12 |
| 锰 (锰) | ≤ 1.00–1.50 |
| 硅 (和) | ≤ 0.75 |
| 磷 (磷) | 0.06–0.15 |
| 硫 (S) | ≤ 0.03 |
| 铬 (铬) | 0.30–1.25 |
| 镍 (在) | 0.20–0.65 |
| 铜 (铜) | 0.25–0.55 |
| 铁 (铁) | 平衡 |
Mechanical Properties of S355JOW
S355JOW provides good strength and toughness for structural applications.
| 财产 | 典型值 |
|---|---|
| 屈服强度 | ≥ 355 兆帕 |
| 抗拉强度 | 470–630 MPa |
| 伸长 | ≥ 20% |
| 冲击韧性 | 好的 (depending on thickness and condition) |
| 密度 | 7.85 克/立方厘米 |
主要性能特点
1. Excellent Weather Resistance
S355JOW is designed to form a dense oxide layer (铜绿) when exposed to alternating wet and dry atmospheric conditions. This layer:
- Protects the base metal from further corrosion
- 减少维护需求
- Eliminates or reduces the need for painting
2. 结构强度好
With a minimum yield strength of 355 兆帕, S355JOW is suitable for load-bearing structural applications such as bridges, 建筑物, and outdoor frameworks.
3. Stable Long-Term Durability
The alloying elements (铜, 铬, 在, 磷) improve long-term corrosion stability, 特别是在:
- 城市环境
- 工业氛围
- Outdoor structural systems
4. Good Weldability and Fabrication
S355JOW can be processed using standard structural steel fabrication methods:
- 焊接 (with proper procedure control)
- 切割
- 弯曲
- 钻孔
- 滚动
Preheating may be required depending on thickness.
Common Applications of S355JOW Steel Plate
S355JOW is widely used in outdoor and structural engineering projects where weather resistance is important.
典型应用包括:
- Bridges and bridge structures
- Railway infrastructure
- Outdoor steel frameworks
- Building facades and architectural structures
- 海运集装箱
- Industrial chimneys
- 输电塔
- Steel sculptures and landscape structures
- Highway barriers and guardrails
- Structural support systems in outdoor environments
S355JOW vs S355JR
| 财产 | S355JOW (耐候钢) | S355JR (结构钢) |
|---|---|---|
| 耐腐蚀 | 高的 (自我保护铜绿) | 标准 |
| Surface Protection | No painting often needed | Requires coating/painting |
| 合金元素 | 铜, 铬, Ni added | Minimal alloying |
| 维护成本 | 降低 | 更高 |
| 典型用途 | Outdoor structures | General structural use |
