---
title: "Inconel 718 — density, melting point and properties"
description: "Inconel 718 has a density of 8,190 kg/m³. Melting point, strength, conductivity, what it is used for, and whether it floats, rusts or is magnetic."
url: https://atoneplace.net/material/inconel-718/
site: "At One Place"
---

# Inconel 718

**Density of Inconel 718: 8,190 kg/m³**

8.19 g/cm³ · 511.3 lb/ft³

A nickel-chromium superalloy that keeps most of its strength at 650 °C, where every steel has gone soft — that temperature capability, not room-temperature strength, is what it is bought for. It work-hardens so aggressively that a dwelling cutting tool will glaze the surface and then be unable to cut it at all, which is why Inconel machining is quoted at several times the cost of steel. Additive manufacturing has taken to it precisely because printing avoids most of that machining.

## Properties

- **Density:** 8,190 kg/m³ — 8.19 g/cm³
- **Melting range:** 1260–1336 °C
- **Tensile strength:** 1100–1400 MPa
- **Young's modulus:** 200 GPa
- **Thermal conductivity:** 11.4 W/(m·K)
- **Thermal expansion:** 13 µm/(m·K)
- **Floats in water:** No
- **Magnetic:** No

## What it is used for

- Turbine discs and hot-section casings
- Rocket engine injectors and nozzles
- Downhole oil and gas tooling
- High-temperature fasteners and springs

## How it compares

*Water is 1,000 kg/m³. Anything with a shorter bar than water floats in it.*

- air: 1.2 kg/m³
- expanded polystyrene foam: 20 kg/m³
- rigid polyurethane foam: 40 kg/m³
- Water — the float line: 1,000 kg/m³
- Inconel 718: 8,190 kg/m³
- tungsten: 19,250 kg/m³
- gold: 19,300 kg/m³
- platinum: 21,450 kg/m³

*Water is 1,000 kg/m³. Anything below that floats.*

| Material | Density | Relative to water |
| --- | --- | --- |
| rigid polyurethane foam | 40 kg/m³ | 0.04× |
| expanded polystyrene foam | 20 kg/m³ | 0.02× |
| air | 1.2 kg/m³ | 0.00× |
| Inconel 718 ← | 8,190 kg/m³ | 8.19× |
| platinum | 21,450 kg/m³ | 21.45× |
| gold | 19,300 kg/m³ | 19.30× |
| tungsten | 19,250 kg/m³ | 19.25× |

## Does it rust?

Inconel 718 does not rust — rust is iron oxide specifically — but it does corrode, forming its own oxide or salts over time.

## Is it magnetic?

Inconel 718 is not ferromagnetic. Most metals are not.

## Common questions

### What is the density of Inconel 718?

8,190 kg/m³, or 8.19 g/cm³.

### Does Inconel 718 float?

No. At 8,190 kg/m³ it is denser than water.

### Is Inconel 718 magnetic?

Inconel 718 is not ferromagnetic. Most metals are not.

## Related pages

- [Does Inconel 718 float?](https://atoneplace.net/does-it-float/inconel-718/)
- [Mild steel](https://atoneplace.net/material/mild-steel/)
- [Stainless steel 304](https://atoneplace.net/material/stainless-304/)
- [Brass](https://atoneplace.net/material/brass/)
- [Gray cast iron](https://atoneplace.net/material/cast-iron/)
- [High-carbon steel](https://atoneplace.net/material/carbon-steel/)
- [Stainless steel 316](https://atoneplace.net/material/stainless-316/)
- [Aluminum 6061](https://atoneplace.net/material/aluminum-6061/)
- [Bronze](https://atoneplace.net/material/bronze/)

## Sources

- Typical range compiled from manufacturer specifications — At One Place (/about/)