S355jow
S355JOW steel plate is a weather-resistant structural steel designed for outdoor environments. Its copper, хром, 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, транспортные системы, and outdoor engineering projects where durability and low maintenance are required.
- Описание
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 (патина) 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, хром, никель, и фосфор.
| Элемент | Содержание (%) |
|---|---|
| Углерод (С) | ≤ 0.12 |
| Марганец (Мин.) | ≤ 1.00–1.50 |
| Кремний (И) | ≤ 0.75 |
| Фосфор (П) | 0.06–0,15 |
| сера (С) | ≤ 0.03 |
| Хром (Кр) | 0.30–1,25 |
| Никель (В) | 0.20–0,65 |
| Медь (Cu) | 0.25–0,55 |
| Железо (Фе) | Баланс |
Mechanical Properties of S355JOW
S355JOW provides good strength and toughness for structural applications.
| Свойство | Типичное значение |
|---|---|
| Предел текучести | ≥ 355 МПа |
| Предел прочности | 470–630 MPa |
| Удлинение | ≥ 20% |
| Ударная вязкость | Хороший (depending on thickness and condition) |
| Плотность | 7.85 г/см³ |
Main Performance Features
1. Excellent Weather Resistance
S355JOW is designed to form a dense oxide layer (патина) when exposed to alternating wet and dry atmospheric conditions. This layer:
- Protects the base metal from further corrosion
- Reduces maintenance requirements
- Eliminates or reduces the need for painting
2. Good Structural Strength
With a minimum yield strength of 355 МПа, S355JOW is suitable for load-bearing structural applications such as bridges, здания, and outdoor frameworks.
3. Stable Long-Term Durability
The alloying elements (Cu, Кр, В, П) improve long-term corrosion stability, особенно в:
- Urban environments
- Industrial atmospheres
- Outdoor structural systems
4. Good Weldability and Fabrication
S355JOW can be processed using standard structural steel fabrication methods:
- Сварка (with proper procedure control)
- Резка
- Гибка
- Бурение
- Роллинг
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.
Типичные области применения включают в себя:
- Bridges and bridge structures
- Railway infrastructure
- Outdoor steel frameworks
- Building facades and architectural structures
- Транспортные контейнеры
- Industrial chimneys
- Передающие башни
- Steel sculptures and landscape structures
- Highway barriers and guardrails
- Structural support systems in outdoor environments
S355JOW vs S355JR
| Свойство | S355JOW (Выветривание стали) | S355JR (Конструкционная сталь) |
|---|---|---|
| Коррозионная стойкость | Высокий (самозащитная патина) | Стандартный |
| Surface Protection | No painting often needed | Requires coating/painting |
| Alloy Elements | Cu, Кр, Ni added | Minimal alloying |
| Maintenance Cost | Ниже | Выше |
| Типичное использование | Outdoor structures | General structural use |
