Corten Steel Rust

Corten Steel Rust

あらかじめ錆びさせた波形金属 あらかじめ錆びさせた波形金属
錆びたコルテン鋼 錆びたコルテン鋼

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 (A242, A588), で (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.

カテゴリ:

コルテンステム (耐候性鋼) refers to a group of low-alloy structural steels designed to form a stable, 保護錆層 (緑青) 屋外環境にさらされた場合. Different countries and standards use different grade systems, but they all belong to the same “weathering steel” family.

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

These are the most widely used international weathering steel grades:

学年 タイプ 主な特長
ASTM A242 Corten A equivalent 早期耐候性鋼グレード, good atmospheric corrosion resistance
ASTM A588 Corten B equivalent Higher strength structural weathering steel
ASTM A606 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 (ヨーロッパ)

European weathering steels are defined under EN 10025-5:

学年 説明 応用
S235J0W Basic weathering structural steel Light structural use
S355J0W Most common grade 橋, 建物, outdoor structures
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:

学年 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:

要素 関数
銅 (銅) Improves rust layer stability
クロム (Cr) 耐食性の向上
ニッケル (で) Improves toughness and patina formation
リン (P) 保護錆層を促進します

👉 This alloy system is what enables the self-protecting rust (緑青) behavior.

5. Main Characteristics of Corten Steel Grades

Regardless of grade system, all Corten steels share:

  • High atmospheric corrosion resistance
  • Formation of stable red-brown rust layer
  • No need for painting in many outdoor applications
  • 屋外環境での長寿命
  • 優れた構造強度 (grade dependent)

6. Common Applications by Grade Type

Structural Grades (A242 / S355J0W / Q355NH)

  • 橋
  • Buildings
  • Outdoor frameworks
  • Infrastructure projects

Heavy Duty Grades (A588 / S355J2W / Q460NH)

  • Offshore structures
  • Railway systems
  • 産業機器
  • Load-bearing steel structures

シート & Decorative Grades (A606 / thin weathering steel)

  • 建築用パネル
  • Corrugated facades
  • Landscaping design
  • Decorative steel screens

コールテン鋼板

コールテン鋼板

コルテンクラッディング