- Описание
Corten sheet metal is a type of weathering steel sheet designed for outdoor use. It forms a dense protective rust layer after exposure to natural weather, which helps reduce further corrosion. This material is commonly used in construction, ландшафтный дизайн, transportation, and industrial structures because it combines structural strength with natural corrosion resistance.
Corten sheet metal is often supplied under standards such as:
- Тип АСТМ А606 4
- АСТМ А588
- В 10025 S355J2W
- Q355NH
It is generally available in thicknesses from 0.8 мм до 6 мм for sheet products, while thicker materials are classified as corten steel plate.
Main Properties of Corten Sheet Metal
The key advantage of corten sheet metal is its ability to form a stable oxide patina. В отличие от обычной углеродистой стали, the rust layer on corten is compact and adherent, slowing down corrosion inside the steel.
Типичный химический состав
| Элемент | Типичный контент (%) | Функция |
|---|---|---|
| Углерод (С) | 0.10–0,20 | Basic strength |
| Медь (Cu) | 0.25–0.40 | Улучшает коррозионную стойкость |
| Хром (Кр) | 0.40–0,65 | Enhances patina formation |
| Никель (В) | 0.30–0,65 | Increases weather resistance |
| Фосфор (П) | ≤0.15 | Helps stabilize rust layer |
| Марганец (Мин.) | 0.80–1,25 | Улучшает прочность |
These alloying elements make corten different from common mild steel, although it is still classified as low-alloy carbon steel.
Механические свойства
| Свойство | Типичное значение |
|---|---|
| Предел текучести | ≥ 345 МПа |
| Предел прочности | 485–630 MPa |
| Удлинение | ≥ 20% |
| Твердость | 130–190 HB |
| Плотность | 7.85 г/см³ |
Corten sheet offers good strength and outdoor durability, but it is not intended for high-wear conditions.
Corten Sheet Metal vs Abrasion Resistant Steel
Corten steel and abrasion resistant steel are often compared because both are used in harsh environments. Their design purposes are different.
| Свойство | Corten Sheet Metal | Устойчивая к истиранию сталь |
|---|---|---|
| Main feature | Устойчивость к атмосферным воздействиям | Износостойкость |
| Твердость | 130–190 HB | 360–600 ГБ |
| Поверхность | Protective rust layer | Usually painted |
| Main alloy | Cu, Кр, В | С, Мин., Б |
| Best application | Outdoor structures | Heavy wear equipment |
| Обработка | Полегче | Сложнее |
| Свариваемость | Хороший | Умеренный |
Main Difference
Corten sheet metal resists atmospheric corrosion, while abrasion resistant steel resists mechanical wear and impact.
Примеры:
- Corten sheet is suitable for façade panels, садовые ширмы, and containers.
- Abrasion resistant steel is suitable for dump truck liners, дробилки, and mining chutes.
This means corten performs better in rainy outdoor conditions, while wear plate performs better in environments with sand, гравий, or constant friction.
Why Corten Is Still Carbon Steel
Many inspection reports classify corten as carbon steel. This is normal because corten is a low-alloy carbon steel, не нержавеющая сталь.
Its base material is still iron and carbon, but alloying elements improve weather resistance. Из-за этого:
- It can rust naturally
- It can be welded like structural steel
- It is magnetic
- It has better outdoor durability than standard carbon steel
The protective rust layer is the major difference between corten and ordinary carbon steel.
Common Applications of Corten Sheet Metal
Corten sheet metal is widely used in:
- Архитектурная облицовка стен
- Outdoor decorative panels
- Садовый бордюр
- Подпорные стены для ландшафта
- Railway vehicles
- Транспортные контейнеры
- Скульптуры
- Bridge components
Its natural rust finish makes it popular for projects where appearance and durability are both important.
