A240 A240m

ASTMA240 / A240M is one of the most important international standards for stainless steel plate, feuille, and strip used in pressure vessels and general industrial applications. It defines the chemical composition, propriétés mécaniques, heat treatment conditions, and quality requirements for stainless steel flat products.

This standard is widely used in chemical processing, construction, énergie, marin, et industries alimentaires.

What is ASTM A240 / A240M?

• ASTMA240: Standard specification for chromium and chromium-nickel stainless steel plate, feuille, and strip
• A240M: Metric version of ASTM A240

It covers a wide range of stainless steel grades including austenitic, ferritique, martensitique, et aciers inoxydables duplex.

Key Characteristics of A240 Stainless Steel Plate

1. Large gamme de nuances d'acier inoxydable

ASTM A240 covers many commonly used stainless steel grades such as:

• 201, 202
• 301, 304, 304L
• 316, 316L
• 321, 347
• 309, 310S
• 410, 420, 430
• 2205, 2507 duplex en acier inoxydable

👉 It is a universal material standard for stainless steel flat products

2. Suitable for Pressure and Structural Applications

A240 stainless steel plates are widely used in:

• Appareils à pression
• Échangeurs de chaleur
• Réservoirs de stockage
• Systèmes de tuyauterie industrielle
• Fabrication structurelle

The material is designed to meet strict mechanical strength and safety requirements.

3. Controlled Chemical Composition

Each grade under A240 has clearly defined limits for:

• Chrome (Cr)
• Nickel (Dans)
• Molybdène (Mo)
• Carbone (C)
• Azote (N)
• Manganèse (Mn)
• Silicium (Et)

This ensures stable corrosion resistance and mechanical performance.

4. Excellente résistance à la corrosion (Depending on Grade)

Because A240 includes multiple stainless steel families, corrosion resistance varies:

• Nuances austénitiques (304, 316): excellent general corrosion resistance
• Duplex grades (2205, 2507): superior chloride resistance
• Nuances ferritiques (430): moderate atmospheric resistance
• Martensitic grades (410, 420): wear resistance with moderate corrosion resistance

5. Good Mechanical Performance

A240 stainless steel plates generally offer:

• High tensile strength (grade dependent)
• Good ductility
• Excellent toughness (austenitic grades)
• High hardness (martensitic grades)
• Good fatigue resistance

6. Excellent Fabrication Performance

Most A240 stainless steels are suitable for:

• Coupe
• Soudage
• Pliage
• Roulement
• Usinage
• Finition des surfaces (2B, BA, N°1, brillant)

Austenitic grades are especially known for excellent formability and weldability.

Common Applications of ASTM A240 Stainless Steel Plate

A240 stainless steel plates are used across many industries:

• Équipement de traitement chimique
• Machines de transformation des aliments
• Équipement pharmaceutique
• Échangeurs de chaleur
• Appareils à pression
• Génie maritime
• Construction and architectural structures
• Oil and gas systems
• Power generation equipment
• Réservoirs de stockage industriels

A240 Stainless Steel vs Other Standards