Inconel 718 Springs - Thermal Properties

Is Inconel Alloy 750 the best material for springs operating at high temperatures?

For short-run, small-batch orders of round wire springs, then the readily available sizes of Inconel X750 should be considered since there are a number of wire vendors that stock it.

INCONEL alloy 718 Thermal Properties*

Temperature, °F	Mean Linear Expansion, in./in./°F x 10-6 from 70°F to Temperature Shown	Thermal Conductivity, Btu/in./hr/sq ft/°F	Specific Heat, Btu/lb/°F	Diffusivity, sq ft/hr	Electrical Resistivity, ohm/circ mil/ft
-250	6.5	67	0.073	0.15	–
-200	6.6	70	0.08	0.143	–
-100	6.7	74	0.09	0.135	–
70	–	83	0.103	0.132	731
200	7	89	0.109	0.133	739
400	7.2	98	0.116	0.14	746
600	7.5	109	0.12	0.148	761
800	7.8	120	0.125	0.158	771
1000	8.1	131	0.13	0.169	783
1200	8.4	143	0.137	0.173	786
1400	8.8	154	0.151	0.172	775
1600	9.3	164	0.171	0.164	761
1800	9.8	–	–	–	–

* Material heat-treated 2100°F/3 hr, A.C., + 1550°F/24 hr, A.C., + 1300°F/20 hr, A.C.

Values for thermal expansion, thermal conductivity, specific heat, and diffusivity are from Lucks and Deem and electrical resistivity from tests conducted at Lehigh University.

Inconel718Springs.com

Inconel 718 Springs

Thermal Properties

Inconel 718 Springs - Thermal Properties

Inconel 718 Springs - Thermal Properties

INCONEL alloy 718 Thermal Properties*

We Specialize in the following Spring Materials:

Inconel 718

Inconel X-750

Inconel 600