Кортен Б

Corten B is a high-performance weathering steel designed for structural engineering applications, offering both mechanical strength and long-term corrosion resistance.

Compared with other materials:

Кортен А is more focused on architectural and decorative use
А588 is very similar and often considered equivalent in structural applications
СПА-Х is a general structural steel without weathering properties

Категория: Кортен Сталь

Описание

Corten B is a high-strength low-alloy weathering steel designed for structural applications exposed to outdoor atmospheric conditions. It develops a stable protective oxide layer (патина) that significantly improves corrosion resistance and reduces the need for painting or coating.

Compared with decorative weathering steels, Corten B is optimized for higher strength, better structural performance, and heavy-duty engineering use.

1. Химический состав Кортена Б

Элемент	Типичный контент (%)
Углерод (С)	≤ 0.19
Марганец (Мин.)	0.80 – 1.25
Кремний (И)	0.30 – 0.65
Фосфор (П)	≤ 0.04
сера (С)	≤ 0.03
Медь (Cu)	0.25 – 0.40
Хром (Кр)	0.40 – 0.65
Никель (В)	≤ 0.40

Key alloying elements such as copper, хром, and nickel help form a dense and stable rust layer, улучшение стойкости к атмосферной коррозии.

2. Mechanical Properties of Corten B

Свойство	Типичное значение
Предел текучести	≥ 355 МПа
Предел прочности	470 – 630 МПа
Удлинение	≥ 18–20%

Corten B offers higher strength and better load-bearing capability compared with Corten A, making it more suitable for structural engineering.

3. Common Applications of Corten B

Corten B is widely used in structural and heavy-duty environments:

Bridge structures and bridge components
Steel frameworks and load-bearing structures
Transportation infrastructure
Industrial equipment and containers
Outdoor exposed structural components

4. Сравнение: Corten B vs Corten A vs A588 vs SPA-H

4.1 Corten B vs Corten A

Особенность	Кортен А	Кортен Б
Main Focus	Архитектурный / декоративный	Structural / load-bearing
Strength Level	Середина	Выше
Содержание фосфора	Выше	Ниже
Коррозионная стойкость	Отличный	Отличный
Формируемость	Лучше	Хороший
Типичное использование	Facades, ландшафтный дизайн	Мосты, structures

Краткое содержание: Corten A is more suitable for architectural appearance, while Corten B is designed for structural performance.

4.2 Corten B vs ASTM A588

Особенность	Кортен Б	АСТМ А588
Стандартная система	В (Европа)	АСТМ (США)
Strength Level	Высокий	Высокий
Коррозионная стойкость	Отличный	Отличный
Фокус на приложениях	General structural use	Мосты и инфраструктура
Global Usage	Europe/Asia	Северная Америка

Краткое содержание: Corten B and A588 are very close in performance and are often considered equivalent weathering structural steels used in similar applications.

4.3 Corten B vs SPA-H

SPA-H is a Japanese JIS structural steel grade and is not a weathering steel.

Особенность	Кортен Б	СПА-Х
Тип стали	Устойчивая к атмосферным воздействиям сталь	Carbon structural steel
Коррозионная стойкость	Высокий (self-protective patina)	Низкий (requires coating)
Outdoor Performance	Отличный	Limited without protection
Maintenance Requirement	Низкий	Высокий
Приложение	Outdoor exposed structures	Containers, general fabrication
Weathering Ability	Да	Нет