コールテン鋼板金

When selecting Corten steel sheet metal, the choice between Corten A and Corten B depends on the application:

選ぶ コルテンA のために 建築的, 装飾的な, and landscaping uses where corrosion resistance and appearance are key
選ぶ コルテンB のために structural and heavy-duty applications requiring higher strength

Both grades provide the signature rusted patina and long-term durability, but their optimized properties make them suitable for different use scenarios.

カテゴリ: コールテンスチール

説明

Corten steel sheet metal is commonly divided into two main grades: コルテンA そして コルテンB. Both are weathering steels designed to form a 保護錆層, but they differ in 構成, 機械的特性, and typical applications.

1. 化学組成の比較

The main difference lies in alloying elements, 特に リン (P) and strength-related elements.

要素	コルテンA (%)	コルテンB (%)
炭素 (C)	≤ 0.12	≤ 0.19
シリコン (そして)	0.25 – 0.75	0.30 – 0.65
マンガン (ん)	0.20 – 1.00	0.80 – 1.25
リン (P)	0.07 – 0.15	≤ 0.04
硫黄 (S)	≤ 0.03	≤ 0.03
銅 (銅)	0.25 – 0.55	0.25 – 0.55
クロム (Cr)	0.50 – 1.25	0.40 – 0.65
ニッケル (で)	≤ 0.65	≤ 0.40

重要な洞察

コルテンA has higher phosphorus, improving atmospheric corrosion resistance
コルテンB has lower phosphorus but higher strength-related elements

2. 機械的性質

財産	コルテンA	コルテンB
降伏強さ	≥ 345 MPa	≥ 355 MPa
抗張力	480 – 630 MPa	490 – 630 MPa
Impact resistance	Limited specification	Better structural performance

3. 耐食性

コルテンA:
- より良い 大気耐食性
- に最適 decorative and architectural applications
コルテンB:
- Slightly lower corrosion resistance than A
- Still excellent, but optimized for structural durability

4. Application Differences

コルテンA (Weathering / Architectural Grade)

Facades and cladding
Garden planters and landscaping
装飾パネルおよびスクリーン
Lightweight structures

コルテンB (Structural Grade)

Bridges and heavy structures
Containers and industrial equipment
Railway wagons
Load-bearing outdoor structures

5. Key Differences Summary

耐食性: コルテンA > コルテンB
強さ: コルテンB > コルテンA
リン含有量: Higher in Corten A
アプリケーションの焦点:
- A → aesthetics and weather resistance
- B → strength and structural use