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AISI 431 - EN 1.4057

AISI 431 - EN 1.4057

AISI 431 - EN 1.4057 is a martensitic stainless steel with superior tensile strength and machinability. Its corrosion resistance capabilities make it an ideal choice for machining precision parts, especially in environments exposed to strong oxidizing agents like nitric acid. The steel is magnetic when quenched and tempered.

Equivalent grades

• DIN 1.4057
• UNS S43100
• X17CrNi16-2
• 431S29T

Chemical Composition Reference


Physical Property Reference

• Density: 7.0 g/cm³

• Thermal Expansion: 10.3 x10^-6/K

• Modulus of Elasticity: 215 GPa

• Thermal Conductivity: 25 W/m.K

• Electrical Resistivity: 0.7 x10^-6 Ω .m

Stock & Dimensions

Our warehouse has a large number of stock to provide you with a variety of products in different sizes, and can also customize the size according to your needs.
• Bar: 0.5~600mm Diameter
• Coil: 0.5~150mm Thick
• Plate: 0.5~200mm Thick
• Pipe: 6~630mm External Diameter; 0.5~40mm Wall Tick
• Available in specific sizes

Product Forms

We provide you with a variety of product forms, including but not limited to:
• Bar/Rod
• Pipe/Tube
• Coil/Strip
• Plate/Sheet/Circle
• Wire
• Fitting (Flange, Elbow, Tee...)
• Customize

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AISI 431 - EN 1.4057

Essential details
AISI 431 - EN 1.4057 stainless steel boasts an exceptional blend of wear- and corrosion-resistance, impact toughness, and high strength. This property can be finely-tuned through specific heat treatment to acquire a unique balance of mechanical to chemical characteristics. 1.4057 stainless steel is broadly resistant to oxidizing acids and corrosion from salt water, suiting it for complex engineering projects in marine applications.

Typical Applications:

- Laboratory equipment

- Marine systems

- Beater bars

- Pump and propeller shafts

- Nuts and bolts

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