Nickel Alloy 800 (UNS N08800)

Topics Covered

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

Introduction

Nickel alloy 800 is a nickel-iron-chromium alloy that resists carburization and oxidation at elevated temperatures. High nickel content in its composition makes the alloys highly resistant to both chloride stress-corrosion cracking and to embrittlement from precipitation of sigma phase.

The following section will discuss in detail about nickel alloy 800.

Chemical Composition

The chemical composition nickel alloy 800 is outlined in the following table.

Element Content (%)
Iron, Fe 39.5
Nickel, Ni 35
Chromium, Cr 19-23
Manganese, Mn 1.5
Silicon, Si 1
Copper, Cu 0.75
Titanium, Ti 0.15-0.6
Aluminum, Al 0.15-0.6
Carbon, C 0.1
Sulfur, S 0.015

Physical Properties

The following table shows the physical properties of nickel alloy 800.

Properties Metric Imperial
Density 8.03 g/cm3 0.29 lb/in3

Mechanical Properties

The mechanical properties of nickel alloy 800 are displayed in the following table.

Properties Metric Imperial
Tensile strength (@21°C/70°F) 600 MPa 87700 psi
Yield strength (@21°C/70°F) 295 MPa 43000 psi
Elongation at break (@21°C/70°F) 44% 44%

Thermal Properties

The thermal properties of nickel alloy 800 are given in the following table

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 14.4 µm/m°C 8 µin/in°F
Thermal conductivity 11.5 W/mK 79.735 BTU.in/hrft².°F

Other Designations

Other designations that are equivalent to nickel alloy 800 include the following:

  • ASTM B 409
  • ASME SB 409
  • AMS 5871

Applications

The following are the list of applications of nickel alloy 800:

  • Steel production
  • Thermal processing fixtures
  • Power generation
  • Chemical and petrochemical processing equipment.

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