Кортен Сталь Ржавчина

Corten steel rust does not refer to a single material grade, but to a family of weathering steel grades across different international standards, including ASTM (А242, А588), В (S355J0W, S355J2W), and GB (Q355NH series). All these grades share a similar alloy design that allows the steel to form a stable protective rust layer, making them ideal for outdoor structural and architectural applications.

Категория: Кортен Сталь

Описание

Кортеновская сталь (атмосферостойкая сталь) refers to a group of low-alloy structural steels designed to form a stable, защитный слой ржавчины (патина) при воздействии внешней среды. Different countries and standards use different grade systems, but they all belong to the same “weathering steel” family.

1. АСТМ / AISI Corten Steel Grades (USA Standard)

These are the most widely used international weathering steel grades:

Оценка	Тип	Ключевые особенности
АСТМ А242	Corten A equivalent	Early weathering steel grade, good atmospheric corrosion resistance
АСТМ А588	Corten B equivalent	Higher strength structural weathering steel
АСТМ А606	Sheet/strip weathering steel	Used for thin plates and decorative panels
ASTM A709 (Grade 50W / 50CR)	Bridge steel	Widely used in bridge construction

👉 These grades are commonly referred to as Corten A and Corten B series materials in the market.

2. EN Standard Weathering Steel Grades (Европа)

European weathering steels are defined under EN 10025-5:

Оценка	Описание	Приложение
S235J0W	Basic weathering structural steel	Light structural use
S355J0W	Most common grade	Мосты, здания, наружные конструкции
S355J2W	Improved low-temperature toughness	Heavy structural engineering
S355K2W	Higher impact toughness	Critical structural applications

👉 “S355J0W” is one of the most widely used Corten-type steels in Europe.

3. Chinese Weathering Steel Grades (GB Standard)

China also has equivalent weathering steel grades:

Оценка	Equivalent Use
Q235NH	Basic weathering steel
Q295NH	Medium strength weathering steel
Q355NH	Main structural weathering steel
Q460NH	High-strength weathering steel

4. Key Alloy System Behind All Corten Grades

Although grade names differ, all Corten steels share similar alloy design:

Элемент	Функция
Медь (Cu)	Improves rust layer stability
Хром (Кр)	Повышает устойчивость к коррозии
Никель (В)	Improves toughness and patina formation
Фосфор (П)	Создает защитный слой ржавчины