Low Expansion Alloy 42 - Alloy 45 - Alloy 49 - What are Low Expansion Alloys?

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Today we're talking about Low expansion alloys. Low expansion alloys are used in applications to either:
minimize changes in dimension with change in temperature
or
expand at a similar rate to another material over a range of temperature
or
create motion when coupled with higher expansion materials over a range of temperature
Examples of applications include thermostats, stable structures for lasers and other sensitive equipment, and seals to glasses and ceramic materials.

Chapters:
Intro: 00:00
Low Expansion Alloys and Their Uses: 00:16
Low Expansion Alloy Applications: 01:15
What is the Nickel Content in these Low Expansion Alloys?: 01:26
Why Are There Other Low Expansion Alloys?: 01:58
How Does Curie Temperature Impact Expansion: 02:30
Low Expansion Alloy Chemistry: 03:42
Are Low Expansion Alloys Magnetic?: 04:43
Low Expansion Alloy Mechanical Properties: 05:10
Spec for Low Expansion Alloys: 05:24
Outro: 06:02