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Cast White Iron

Duracast® N460

Overview

Duracast® N460 Cast White Iron is an abrasion-resistant cast white iron with a long history as a high-performing, low-cost material in mining applications. Duracast® N460 Cast White Iron owes its excellent wear and impact-resistant properties to its alloying additions and microstructure.

Duracast® N460 Cast White Iron can be cast in blocks, billets, plates and custom shapes.

Manufacture
Duracast® N460 is cast material produced by Bradken foundries with an automated moulding machine allowing high volume, low cost manufacturing. After casting Duracast® N460 is heat treated to maximise its wear and impact resistance.
Composition
Duracast® N460 conforms to the white iron alloy designated by ISO21988/JN/HBW555Cr9; commonly referred to as NiHard 4. The major alloying elements, Chromium, Nickel and Silicon, help to give this material its superior properties. A typical chemical composition is provided below:
Carbon

2.8%–3.4%

Silicon

1.5%–2.5%

Manganese

0.3%–0.8%

Chromium

8.0%-10.0%

Nickel

4.5%-6.5%

Microstructure
The microstructure of Duracast® N460 is particularly important in providing good wear performance. After casting Duracast® N460 into the desired shape, a heat treatment cycle is used to transform the softer as-cast microstructure into the hard, long-lasting material needed in abrasive applications. This microstructure consists of eutectic M7C3 carbides in a predominately martensitic matrix.
Bulk Properties
Bulk Hardness

600–700 HV50

Carbide Hardness

≥1200 HV0.5

Volume Fraction of Carbides

20%–25%

Density

7750 kg/m3

Manufacturing Process

Manufacturing Prcess

Duracast® N460 Manufacturing Process

Duracast® NH4 Microstructure

Microstructure

Duracast® NH4 Chrome White Iron Billet Application

Billet Application

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