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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:
- 건축 외관
- Landscape design
- Bridges and structural engineering
- 야외 조각품
- Garden screens and wall panels
- 산업구조
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. 코르텐 A
형질
- One of the most common weathering steel grades
- 우수한 대기 내식성
- Good decorative rust appearance
- Lower phosphorus structural limitation than structural grades
응용
- 건축 벽면 패널
- 장식용 스크린
- 조경 구조물
- 정원 테두리
- Exterior cladding systems
Corten A is mainly used for architectural and decorative applications.
2. 코르텐 B
형질
- Higher structural strength than Corten A
- Better heavy-load performance
- 좋은 용접성
- 강한 옥외 내구성
응용
- 교량
- Structural steel frameworks
- 철도 마차
- Industrial buildings
- Heavy outdoor structures
Corten B is more suitable for structural engineering projects.
3. ASTM A588 Weathering Steel
형질
- High-strength low-alloy weathering steel
- 우수한 대기 내식성
- Designed for structural applications
응용
- 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
형질
- Weathering sheet steel with good formability
- Suitable for thin sheet processing
- Excellent decorative appearance
응용
- Roofing panels
- 벽 클래딩
- 건축 외관
- Decorative steel panels
A606 is commonly used for architectural sheet metal applications.
5. S355J2W Weathering Steel
형질
- 유럽 표준 내후성 강철
- 좋은 기계적 강도
- 우수한 대기 내식성
응용
- European structural projects
- Outdoor steel structures
- Architectural engineering
This grade is common in European construction standards.
6. SPA-H Weathering Steel
형질
- Japanese standard weathering steel
- 좋은 내식성
- Stable rust layer formation
응용
- 철도 시스템
- 컨테이너
- Architectural projects
- Outdoor engineering structures
SPA-H is widely used in Asian markets.
Comparison of Common Corten Steel Grades
| 등급 | 주요 특징 | 일반적인 사용 |
|---|---|---|
| 코르텐 A | Decorative weathering steel | Facades and screens |
| 코르텐 B | Structural weathering steel | 교량 및 무거운 구조물 |
| ASTM A588 | 고강도 구조용 강철 | Engineering projects |
| ASTM A606 | Formable sheet steel | 루핑 및 벽면 패널 |
| S355J2W | European structural grade | Outdoor construction |
| SPA-H | 일본 풍화강 | Railway and architecture |
Common Thickness Range of Corten Steel Sheets
| 두께 | 일반적인 응용 분야 |
|---|---|
| 1 – 3 mm | 장식 패널 및 스크린 |
| 3 – 6 mm | Wall cladding and facades |
| 6 – 20 mm | 구조공학 |
| 20 mm+ | Heavy industrial structures |
Why Corten Steel Grades Matter
Different grades affect:
- Corrosion resistance performance
- 구조적 강도
- 용접성
- Processing capability
- 옥외 내구성
Choosing the correct grade depends on:
- Decorative or structural use
- Environmental exposure conditions
- Engineering load requirements
