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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
Duracast® N460 Manufacturing Process
Microstructure
Billet Application
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