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Monel 405/R405

Monel 405/R405

Monel alloy 405, commonly referred to as Monel R405, is a special free-machining grade of alloy 400. Its content of nickel, carbon, manganese, iron, silicon, and copper remains equal to that of alloy 400, while the sulfur is raised from a maximum of 0.024% to a range of 0.025-0.060%.

Equivalent grades

• Monel 405
• Monel R405
• UNS N04405

Chemical Composition Reference


Physical Property Reference

• Density: 8.8 g/cm³

• Melting Point: 1350°C

• Tensile Strength(min): 550 MPa

• Yield Strength(min): 240 MPa

• Elongation at break: 40%

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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Monel 405/R405

Essential details
Alloy 405 is used chiefly for automatic screw machine stock and is not generally recommended for other applications. The nickel-copper sulfides resulting from the sulfur in its composition act as chip breakers, but because of these inclusions the surface finish of the alloy is not as smooth as that of alloy 400. Monel 405 is designated UNS N04405 and is covered by ASME SB-164, ASTM B-164, Federal QQ-N-281, SAE AMS 4674 & 7234, Military MIL-N-894, and NACE MR-01-75.


- Meter and valve parts

- Fasteners

- Screw machine products

- Oil refinery piping

- Heat exchangers

- Nuclear fuel production

- Generator tubing

- High temperature heating coils

- Crude oil transfer piping

- Propeller and pump shafts

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