- Descrição
Corten steel sheets are weather-resistant steel plates designed to form a stable protective rust layer after exposure to the atmosphere. This oxidation layer helps reduce further corrosion and gives the steel its characteristic rusted appearance.
Corten steel is widely used in:
- Fachadas arquitetônicas
- Landscape design
- Bridges and structural engineering
- Esculturas ao ar livre
- Garden screens and wall panels
- Estruturas industriais
The name “Corten” comes from:
- COR = corrosion resistance
- TEN = tensile strength
Why Different Corten Steel Grades Exist
Different weathering steel grades are developed for:
- Different strength requirements
- Structural engineering standards
- Atmospheric corrosion resistance levels
- Welding and fabrication performance
- Regional industry standards
Some grades focus more on decoration, while others are designed for heavy structural applications.
Common Grades of Corten Steel Sheets
1. Corten A
Características
- One of the most common weathering steel grades
- Excelente resistência à corrosão atmosférica
- Good decorative rust appearance
- Lower phosphorus structural limitation than structural grades
Aplicações
- Architectural wall panels
- Telas decorativas
- Estruturas paisagísticas
- Borda de jardim
- Exterior cladding systems
Corten A is mainly used for architectural and decorative applications.
2. Corten B
Características
- Higher structural strength than Corten A
- Better heavy-load performance
- Boa soldabilidade
- Strong outdoor durability
Aplicações
- Pontes
- Structural steel frameworks
- Vagões ferroviários
- Edifícios industriais
- Heavy outdoor structures
Corten B is more suitable for structural engineering projects.
3. ASTM A588 Weathering Steel
Características
- High-strength low-alloy weathering steel
- Excelente resistência à corrosão atmosférica
- Designed for structural applications
Aplicações
- Highway bridges
- Steel construction projects
- Large outdoor structures
- Structural support systems
ASTM A588 is widely used in North American structural engineering.
4. ASTM A606 Weathering Steel
Características
- Weathering sheet steel with good formability
- Suitable for thin sheet processing
- Excellent decorative appearance
Aplicações
- Roofing panels
- Wall cladding
- Fachadas arquitetônicas
- Decorative steel panels
A606 is commonly used for architectural sheet metal applications.
5. S355J2W Weathering Steel
Características
- Aço de intemperismo padrão europeu
- Boa resistência mecânica
- Excelente resistência à corrosão atmosférica
Aplicações
- European structural projects
- Outdoor steel structures
- Architectural engineering
This grade is common in European construction standards.
6. SPA-H Weathering Steel
Características
- Japanese standard weathering steel
- Boa resistência à corrosão
- Stable rust layer formation
Aplicações
- Sistemas ferroviários
- Recipientes
- Architectural projects
- Outdoor engineering structures
SPA-H is widely used in Asian markets.
Comparison of Common Corten Steel Grades
| Nota | Recurso principal | Common Use |
|---|---|---|
| Corten A | Decorative weathering steel | Facades and screens |
| Corten B | Aço para intemperismo estrutural | Pontes e estruturas pesadas |
| ASTM A588 | High-strength structural steel | Engineering projects |
| ASTM A606 | Formable sheet steel | Telhados e painéis de parede |
| S355J2W | European structural grade | Outdoor construction |
| SPA-H | Aço de intemperismo japonês | Railway and architecture |
Common Thickness Range of Corten Steel Sheets
| Grossura | Aplicações Típicas |
|---|---|
| 1 – 3 milímetros | Painéis e telas decorativas |
| 3 – 6 milímetros | Wall cladding and facades |
| 6 – 20 milímetros | Engenharia estrutural |
| 20 mm+ | Heavy industrial structures |
Why Corten Steel Grades Matter
Different grades affect:
- Corrosion resistance performance
- Resistência estrutural
- Soldabilidade
- Processing capability
- Durabilidade ao ar livre
Choosing the correct grade depends on:
- Decorative or structural use
- Environmental exposure conditions
- Engineering load requirements
