ALLOY 718 Bar

Alternative and trade names
ALLOY 718, UNS N07718
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Description

Alloy 718 is a age-hardened nickel-chromium alloy containing also significant amounts of iron, niobium and molybdenum along with lesser amounts of aluminum and titanium. This provides a high strength alloy combined with corrosion resistance. Service temperatures range from -250°C to about 650°C. This alloy has also very good weldability.

Related Standards

Equivalent Materials

This material data has been provided by Sverdrup Steel.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

Dimension

PropertyValue

Diameter

12.7 - 304.8 mm

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Mechanical

PropertyTemperatureValue

Charpy impact energy, V-notch

-101.0 °C

27 J

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Elongation

23.0 °C

30 %

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Hardness, Brinell

23.0 °C

248 - 363 [-]

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Tensile strength

23.0 °C

895 - 1250 MPa

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Yield strength Rp0.2

23.0 °C

725 - 1000 MPa

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Chemical properties

PropertyValueComment

Aluminium

0.2 - 0.8 %

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Carbon

0.08 %

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Chromium

17 - 21 %

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Copper

0.3 %

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Manganese

0.35 %

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Molybdenum

2.8 - 3.3 %

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Nickel

50 - 55 %

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Other

4.75 - 5.5 %

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Nb+Ta

Phosphorus

0.02 %

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Silicon

0.35 %

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Sulfur

0.015 %

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Titanium

0.65 - 1.05 %

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Technological properties

Property
Application areas

Used in pumps, tooling, gas turbines rocket motors and nuclear reactors.

Heat Treatment

Solution annealed at 1000 – 1052°C. Age hardening at 774 – 802°C.

Welding

Very good