Alloy 45

Description

With a relatively constant rate of thermal expansion to about 800°F (538°C), low expansion 45 Alloy has been used in thermostats, and its thermal expansion is similar to some alumina ceramics. High permeability 45 Alloy is a 45% nickel-iron alloy capable of exhibiting a high initial permeability and has been used predominantly in the telecommunications industry. National Electronic Alloys does not sell the High Permeability version of 45 Alloy.

Chemical Content(%)

Ni Cr Mn Si C Al Mg P S Fe
46 max 0.10 max 0.80 max 0.30 max 0.05 max 0.10 max 0.50 max 0.025 max 0.025 Rem

TYPICAL TENSILE STRENTGH

ANNEALED 1/4 HARD 1/2 HARD HARD
85,000 MAX 90,000 TO 115,000 105,000 TO 125,000 120,000 MIN.

TYPICAL HARDNESS, ROCKWELL B

ANNEALED 1/4 HARD 1/2 HAR
70 MAX 78 TO 83 84 TO 88

Controlled expansion alloys using compression or eyelet brazed seals 
Alloy 45 is available in Sheet, Strip and Plate.