Nickel Alloy 75 (UNS N06075)

Jul 8 2013

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications

Introduction

Nickel alloy 75 is a creep-resistant nickel-chromium-iron alloy with controlled carbon content and a small amount of titanium. The alloy is characterized by good mechanical properties at elevated temperatures up to 1000°C (1830°F), excellent oxidation resistance at temperatures up to 1100°C (2000°F), and good metallurgical stability.

The following section will discuss in detail about nickel alloy 75.

Chemical Composition

The chemical composition nickel alloy 75 is outlined in the following table.

Element Content (%)
Nickel, Ni 72
Chromium, Cr 18-21
Iron, Fe ≤5
Manganese, Mn ≤1
Silicon, Si ≤1
Copper, Cu ≤0.5
Titanium, Ti 0.2-0.6
Carbon, C 0.08-0.15

Physical Properties

The following table shows the physical properties of nickel alloy 75.

Properties Metric Imperial
Density 8.37 g/cm3 0.302 lb/in3
Melting point 1340-1380°C 2440-2520°F

Mechanical Properties

The mechanical properties of nickel alloy 75 are displayed in the following table.

Properties Metric Imperial
Tensile strength (annealed) 750 MPa 109000 psi
Yield strength (annealed) 275 MPa 39900 psi
Elongation at break (annealed) 42% 42%

Thermal Properties

The thermal properties of nickel alloy 75 are given in the following table

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 11 µm/m°C 6.11µin/in°F
Thermal conductivity 11.7 W/mK 81.2 BTU.in/hrft².°F

Other Designations

Other designations that are equivalent to nickel alloy 75 include the following:

  • BS HR5
  • BS HR203
  • BS HR403
  • BS HR504
  • DIN 17742
  • DIN 17750 – 17752
  • AFNOR NC 20T
  • AECMA Pr EN 2293
  • AECMA Pr EN 2306-2308

Applications

The following are the list of applications of nickel alloy 75:

  • Sheet-metal fabrications in gas-turbine engines
  • Heat-treating equipment and fixtures
  • Components of industrial furnaces
  • Nuclear engineering
  • Thermocouple sheathing
  • High temperature fasteners, springs, dies and cores

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