Alloy Wire International
Datasheet: Incoloy® 800
Incoloy® 800
This Nickel-Iron-Chromium alloy has good strength and excellent resistance to oxidation and carburisation in high temperature atmospheres. Incoloy® 800 also resists corrosion in many aqueous environments, and has been used in some steam generation plants due to its resistance to stress cracking.
Incoloy® 800 is also known as Nicrofer 3220, Nicrimphy 800, and Pyromet 800.
Available in all profile options
Key Features
Incoloy® 800 offers the following key features:
Corrosion Resistant at Ambient Temperatures
Precipitation Hardenable
High temperature static applications**
Typical Applications
Incoloy® 800 is known to be suitable for the following applications:
Process Piping
Heat Exchangers
Carburising Equipment
Heating Element Sheathing
Designations
W.NR 1.4876
UNS N08800
AWS 020
Specifications
BS 3075 NA15
BS 3076 NA15
Chemical Composition
The chemical composition of Incoloy® 800 is indicated in the table below:
| Element | Min % | Max % |
|---|---|---|
| Ni | 30.00 | 35.00 |
| Co | – | 2.00 |
| Cu | – | 0.75 |
| Cr | 19.00 | 23.00 |
| Al | 0.15 | 0.60 |
| C | – | 0.10 |
| Si | – | 1.00 |
| Mn | – | 1.50 |
| Ti | 0.15 | 0.60 |
| Fe | bal | |
| S | – | 0.015 |
Alloy Details
Incoloy® 800 density, melting point, coefficient of expansion, and modulus of elasticity is indicated in the table below:
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 7.94 g/cm³ | 1385 °C | 14.4 μm/m °C (20 – 100 °C) | 78.9 kN/mm² | 196.5 kN/mm² |
| 0.287 lb/in³ | 2525 °F | 7.9 x 10-6 in/in °F (70 – 212 °F) | 11444 ksi | 28500 ksi |
Heat treatment of finished parts
The typical heat treatment of Incoloy® 800:
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Annealed or Spring Temper | Stress Relieve | 450 – 470 °C (840 – 880 °F) | 0.5 – 1 Hr | Air |
Properties
The typical mechanical properties of Incoloy® 800:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <800 N/mm² | <116 ksi |
| Approx. operating temperature depending on load** and environment | -200 to +815 °C | -330 to +1500 °C |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 800 – 1100 N/mm² | 116 – 159 ksi |
| Approx. operating temperature depending on load** and environment | -200 to +815 °C | -330 to +1500 °C |
The above tensile strength ranges are typical. If you require different please ask.
* Trade name of Special Metals Group of Companies ** Static applications = still/fixed/motionless/rigid
