Nickel Iron Alloys Comparison Page

Nickel Iron Alloys Comparison Page

Nickel Iron Alloys fall under different categories and be applied to a variety of industries. Under Controlled Expansion Alloys falls:

Low Expansion Alloys include:

ASTM 15 Alloy or Kovar is the densest pairing of the nickel iron alloys. This alloy has great thermal conductivity, possessing the most significant ability out of the group. Kovar has the highest melting point at 2640 degrees Fahrenheit. Kovar is used in the telecommunicationsaircraft & aerospace Industrymilitary and defense industries.

45 alloy, consisting of 45% nickel-iron, has a relatively stable thermal expansion point of 800 degrees Fahrenheit. This alloy is more often than not applied in the telecommunications industry.  46 Alloy contains 46% nickel-iron compound and has a melting point of 2600 degrees Fahrenheit and a Curie point of 860.

4750, 48, and 49 Alloys also fall under the subcategory of shielding alloys. 48 Alloy also has a melting point of 2600 degrees Fahrenheit and a Curie point of 860. These highly permeable alloys, with their ability to protect against corrosion, are commonly applied in the aircraft and aerospace industries.

52 Alloy is a glass sealing alloy that has a relatively stable rate of thermal expansion at approximately 1000 degrees Fahrenheit. 52 Alloy has the ability to resist corrosion and humidity can affect its abilities in this area. 52 Alloy is almost as dense as Kovar and has the second highest thermal conductivity rate among the Nickel Iron Alloys. This alloy is used in the telecommunication industry.

36 Alloy, or better known as Invar, has the lowest coefficient of thermal expansion and thermal conductivity out of the nickel iron alloys. This alloy does not react to temperature, neither contracting nor expanding. On the other hand, this alloy has the highest electrical resistance coupled with the lowest Curie point at 535 degrees Fahrenheit. Invar is commonly applied in the telecommunications, aircraft and aerospace, military and defense industries and, solar industries.

42 Alloy has the second highest electrical resistance ability behind Invar and a relatively low thermal conductivity rate. Similar to Invar, 42 Alloy is utilized in the telecommunications and aircraft industries. This alloy has a relatively low, constant thermal expansion rate at room temperature.

For a chart comparison of the Nickel Iron Alloys click here