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Incoloy 840

Incoloy 840

INCOLOY 840 boasts remarkable mechanical strength and thermal efficiency, making it a safe and reliable choice. Installation is easy and its service life is impressive, with applications including hot runner heating coils, heating rods, heating tubes, and thermocouples.

Equivalent grades

• Incoloy 840
• UNS S33400
• W.Nr. 1.4847
• Alloy 840

Chemical Composition Reference


Physical Property Reference

• Density: 7.92 g/cm³

• Tensile Strength: 515 MPa

• Yield Strength: 275 MPa

• Modulus of Elasticity: 913 GPa

• Melting Point: 1385 ℃

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

View full details

Incoloy 840

Essential details
Incoloy 840 (S33400) alloy is a titanium and aluminum austenitic stainless steel containing enough chromium to form and maintain a sufficient scale of chromium oxide, so that it is protected under high-temperature conditions, than the traditional chrome-nickel stainless steel, such as 304 stainless steel, High temperature; higher nickel content, compared to the standard 18-8 type stainless steel has better oxidation resistance, its oxidation resistance no less inferior to the use of temperatures up to 1900 degrees (1038 ℃) higher Grade alloy. Therefore, the 840 (S33400) alloy is ideal for the manufacture of electric heat pipes, automotive emission control systems and other high-temperature resistant products.

Incoloy 840 has the characteristics of high mechanical strength, high thermal efficiency, safety and reliability, easy installation and long service life. It is widely used in various water tanks, oil tanks, acid and alkali tanks, fusible metal melting furnaces, air heating furnaces, drying furnaces, and drying ovens. The specific forms are industrial accessories such as hot runner heating coils, heating rods, heating tubes, thermocouples, temperature control boxes, temperature control accessories and connectors.


- Construction

- Bridges

- Petrochemical Industry

- Ship Building

- Engineering

- General Structural Purposes

- Offshore and Onshore Services

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