Monel Alloy 400 V S Inconel Alloy 600

Monel Alloy 400 Vs Inconel Alloy 600

Overview

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Monel 400 and Inconel 600 are the most commonly utilized nickel alloys known for their excellent corrosion resistance. Their distinct compositions make them suitable for different applications, and they cannot be used interchangeably. Monel 400 is predominantly used in marine applications at room temperature, while Inconel 600 is favored for high-temperature environments.

This article provides a detailed comparison of these two alloys across ten aspects.

Basic Information

Name

Monel 400

UNS N04400

W.Nr. 2.4360

Brand

MONEL®

Matrix

Nickel

Copper

Type

Solid Solution Strengthened Alloy

Density

8.80 g/cm³

Use Temperature

Room Temperature

Name

Inconel 600

UNS N06600

W.Nr. 2.4816

Brand

INCONEL®

Matrix

Nickel

Chromium

Iron

Type

Solid Solution Strengthened Alloy

Density

8.47 g/cm³

Use Temperature

High Temperature

Introduction

Monel 400

MONEL® nickel-copper alloy 400 (UNS N04400 / W.Nr. 2.4360 and 2.4361) is a solid-solution alloy that can be hardened only by cold working. It possesses high strength and toughness across a broad temperature range and provides exceptional resistance to many corrosive environments.

Inconel 600

INCONEL® (nickel-chromium-iron) alloy 600 (UNS N06600 / W.Nr. 2.4816) is a standard engineering material for applications requiring corrosion and heat resistance. This alloy also offers excellent mechanical properties, combining high strength with good workability.

Chemical Composition

400

600

400

600

400

600

400

600

400

600

400

600

400

600

400

600

Purity

Monel 400

LOSE

Inconel 600

WIN

400

600

400

600

Inconel 600 has stricter control of harmful elements, such as sulfur and manganese, compared to Monel 400. These elements significantly impair the alloy's durability and transient properties at high temperatures. Therefore, for high-temperature applications, Inconel 600 demands higher purity.

Corrosion Resistance

Monel 400

Seawater Corrosion

Inconel 600

High-temperature Corrosion

400

600

400

600

400

600

Both Monel 400 and Inconel 600 boast impressive corrosion resistance, though their mechanisms differ.

The corrosion resistance of Monel 400 mainly stems from copper. Copper provides exceptional corrosion resistance at room temperature, especially in flowing seawater, making Monel 400 indispensable for marine applications. However, copper easily oxidizes at high temperatures, limiting Monel 400's effectiveness in such conditions.

In Inconel 600, corrosion resistance is primarily derived from chromium. Chromium forms a protective oxide film upon oxidation, which shields the alloy from further oxidation. This property is effective even at high temperatures, making Inconel 600 suitable for high-temperature corrosion-resistant applications.

Mechanical Behavior

Monel 400

LOSE

Inconel 600

WIN

In general, both Monel 400 and Inconel 600 possess moderate strength. However, chromium exhibits a more pronounced solid-solution strengthening effect compared to copper, giving Inconel 600 higher strength. This is crucial for its high-temperature performance.

Physical Properties

Physical properties of Monel 400 and Inconel 600:

Property	Monel 400	Inconel 600
Density (g/cm³)	8.80	8.47
Density (lb/in³)	0.318	0.306
Melting Range (°F)	2370-2460	2470-2575
Melting Range (°C)	1300-1350	1354-1413
Curie Temperature (°F)	70-120	-192
Curie Temperature (°C)	21-49	-124

Application

Monel 400 is preferred for room temperature applications, whereas Inconel 600 is favored for high-temperature applications.

Supported Products

Main Standards

Monel 400

Condenser and Heat Exchanger Tube: ASTM B163

Seamless Pipe and Tube: ASTM B165, ASTM B829

Welded Pipe: ASTM B725, ASTM B775

Welded Tube: ASTM B730, ASTM B751

Welded Fittings: ASTM B366

Rod, Bar, and Wire: ASTM B164

Forgings: ASTM B564

Plate, Sheet, and Strip: ASTM B127

Inconel 600

Condenser and Heat Exchanger Tube: ASTM B163

Seamless Pipe and Tube: ASTM B167, ASTM B829

Welded Pipe: ASTM B517, ASTM B775

Welded Tube: ASTM B516, ASTM B751

Welded Fittings: ASTM B366

Rod, Bar, and Wire: ASTM B166

Forgings: ASTM B564

Plate, Sheet, and Strip: ASTM B168, ASTM B906

Price

Monel 400

TIE

Inconel 600

TIE

The price difference between the two alloys is minimal, and since they serve different purposes, their prices are not comparable.

Conclusion

Monel 400, a nickel-copper alloy, excels in flowing seawater corrosion resistance, making it ideal for room temperature applications.

Conversely, Inconel 600, a nickel-chromium-iron alloy, is specifically designed for high-temperature corrosion-resistant applications.

We produce high-performance Monel 400 and Inconel 600 alloys. Contact us for a quote.

Nickel Alloy Steel Seamless Tube ASTM B444 Inconel 625

Product Description

 

NICKEL ALLOY SEAMLESS STEEL PIPE

As a professional manufacturer of nickel alloys in China, Zhejiang Xintongda Special Steel Manufacturing CO., LIMITED supplies a wide range of nickel alloy products to customers worldwide. Our product forms include Pipes, Fittings, Bars, Sheets, and Wires, featuring major alloy grades such as Monel, Inconel, Incoloy, and Hastelloy. In addition, we offer special alloys like Nimonic, Nitronic, and pure-nickel to meet custom demands. With 30 years of experience in the alloy industry, we have developed robust quality control solutions to ensure worry-free purchasing. At XTD, you can trust our nickel alloy products.

Material

Nickel Alloys

Form

Pipes, Fittings, Bars, Sheets, and Wires

Specification

ASTM, AISI, ANSI, DIN, JIS, EN, GB, Non-standard

The nickel alloy seamless pipe has exceptional leakproofness and high-pressure resistance compared to its welded counterpart. It offers excellent corrosion resistance and high-temperature performance, making it suitable for challenging environments.

Our offerings include Monel (400, 401, K-500), Inconel (600, 601, 625, 718), Incoloy (800, 825, A-286), and Hastelloy (B-2, C-22, C-276). The outer diameter of our pipes and tubes ranges from 3mm to 600mm, with customization options available.

We pride ourselves on offering high-quality products at competitive prices. For any inquiries, please do not hesitate to contact us.

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