Coballoy Alloy
1

Introduction

Solid Solution
Strengthened Alloy

Cobalt

Chromium

Tungsten

Corrosion
Resistance

88

Mechanical
Behavior

95

Purity

92

Overview

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Coballoy 1 is a hardfacing alloy possessing excellent abrasion and corrosion resistance for applications such as pump sleeves, rotary seal rings, wear pads, expeller screws and bearing sleeves. It retains its hardness at temperatures in excess of 760°C (1400°F).

Coballoy 1 contains a high proportion of hard, wear resistant primary carbides. These render the alloy well suited to applications involving extreme low-angle erosion and severe abrasion, with some sacrifice in toughness.

Compared with other Coballoy alloys it is more crack-sensitive, and care should be taken to minimize the cooling stresses experienced during hardfacing processes. Due to its high hardness and wear resistance, Coballoy 1 should only be finished by grinding. The casted equivalent of Coballoy 1 is known under Coballoy 3.

Corrosion Resistance

Coballoy 1 has good general corrosion resistance. The typical electrode potential in sea water at room temperature is approx. -0.4 V (SCE). Coballoy 1 corrodes primarily by a pitting mechanism and not by general mass loss in seawater and chloride solutions.

Physical Properties

Mechanical Properties

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