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Material Introduction to Inconel 718

2024-05-13

Inconel 718 alloy is a precipitation-hardened nickel-chromium-iron alloy containing niobium and molybdenum. It exhibits high strength and good toughness at 700°C, as well as corrosion resistance in both high and low temperature environments. It can be supplied in either a solution-treated or precipitation-hardened condition.

chemical composition

Category	C	Cr	Ni	Co	Mo	Al	Ti	Fe
Standard	0.08	17.0~21.0	50.0~55.0	≤1.0	2.80~3.30	0.30~0.70	0.75~1.15	Balance
Category	Nb	Mg	Mn	Si	P	S	Cu
Standard	4.75~5.50	0.01	0.35	0.35	0.015	0.015	0.3

Performance
Melting temperature range 1260~1320 ℃, density p=8.24g/cm3

Linear expansion coefficient

8/℃	20～100	20~200	20~30	20~400	20~500	20～600	20~700	20~800	20~900	20～1000
a/10-6'℃	11.8	13	13.5	14.1	14.4	14.8	15.4	17	18.4	18.7

Scope of application

Due to its high temperature strength, excellent corrosion resistance, and ease of processing at 700 ℃, Inconel718 alloy can be widely used in various high demand situations.

1. Steam turbine

2. Liquid fuel rocket

3. Low temperature engineering

4. Acidic environment

5. Nuclear engineering

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Material Introduction to Inconel 718

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