Alloy 718 / 2.4668

Alternative and trade names
Alloy 718

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Description

Alloy 718 (2.4668) has a very good creep resistance. Besides the good short-and long-term mechanical properties - especially at low temperatures -, it has a high fatigue strength and offers a very good weldability in the application of arc and resistance welding processes. Alloy 718 is not susceptible to weld cracking. Alloy 718 is an age-hardenable alloy. By heat treatment an increase in strength can be achieved.

Related Standards

DIN EN 17744

Equivalent Materials

This material data has been provided by Hempel Special Metals.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
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

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Properties

General

Property	Temperature	Value
Density	23.0 °C	8.2 g/cm³ Show Supplier Material materials with Density of 8.2 g/cm³

Mechanical

Property	Temperature	Value	Comment
Impact strength, Charpy notched	-59.0 °C	710 kJ/m² Show Supplier Material materials with Impact strength, Charpy notched of 710 kJ/m²	max.

Thermal

Property	Value
Melting point	1260 - 1340 °C Show Supplier Material materials with Melting point of 1260 - 1340 °C

Chemical properties

Property	Value	Comment
Aluminium	0.2 - 0.8 % Show Supplier Material materials with Aluminium of 0.2 - 0.8 %
Boron	6E-3 % Show Supplier Material materials with Boron of 6E-3 %	max.
Carbon	0.08 % Show Supplier Material materials with Carbon of 0.08 %	max.
Chromium	17 - 21 % Show Supplier Material materials with Chromium of 17 - 21 %
Cobalt	1 % Show Supplier Material materials with Cobalt of 1 %	max.
Copper	0.3 % Show Supplier Material materials with Copper of 0.3 %	max.
Iron	Balance
Manganese	0.04 % Show Supplier Material materials with Manganese of 0.04 %	max.
Molybdenum	2.8 - 3.3 % Show Supplier Material materials with Molybdenum of 2.8 - 3.3 %
Nickel	50 - 55 % Show Supplier Material materials with Nickel of 50 - 55 %
Niobium	4.75 - 5.5 % Show Supplier Material materials with Niobium of 4.75 - 5.5 %
Phosphorus	0.02 % Show Supplier Material materials with Phosphorus of 0.02 %	max.
Silicon	0.35 % Show Supplier Material materials with Silicon of 0.35 %	max.
Sulfur	0.015 % Show Supplier Material materials with Sulfur of 0.015 %	max.
Tantalum	0.05 % Show Supplier Material materials with Tantalum of 0.05 %	max.
Titanium	0.65 - 1.15 % Show Supplier Material materials with Titanium of 0.65 - 1.15 %

Technological properties

Property
Application areas	Alloy 718 was originally developed for the aerospace industry, and is now not only used in engines, gas turbines, or other components of the aircraft industry, but also in nuclear reactors, springs and high-strength bolts. In the oil and gas industry Alloy718 is also very popular because of its corrosion resistance and strength.
Welding	Alloy 718 is recommended itself as filler material.