Hastelloy Alloy
C

Introduction

Solid Solution
Strengthened Alloy

Nickel

Molybdenum

Chromium

Corrosion
Resistance

87

Mechanical
Behavior

74

Purity

83

Overview

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In order for Hastelloy C to, in a wide range of environments that can be considered severe, offer superior corrosion resistance, tungsten has been added to a nickel-molybdenum-chromium super-alloy. How does this work? To maintain resistance against corrosion in as-sprayed structures, the low carbon content, during spraying, minimizes carbide precipitation. Chromium offers resistance against oxidizing media. Especially resistant is the nickel steel alloy (with molybdenum and high nickel contents) when it comes to crevice corrosion and pitting in reducing environments. And though Hastelloy C is undeniably the most widely used, there are numerous variations of the Hastelloy nickel alloy.

Hastelloy C Ratings for Machinability

This kind of wear, temperature, cobalt, and nickel-base corrosion resistant alloy, when machining, is classified as difficult down to moderate. It is important to realize, however, that the machining of these alloys is possible at satisfactory rates using production methods which are considered conventional. These alloys harden rapidly during machining. During cutting, they generate heat and may, as a result, weld to the surface of the cutting tool. Because of their high shear strengths, they will offer high resistance to metal removal

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