45 Alloy: 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.

46 Alloy: Consisting of 46% nickel and iron balance, 46 Alloy is a controlled expansion alloy used mostly in electronic applications, especially for glass and ceramic seals. Alloy 46 is also known as Pernifer 462, NILO 464, and Glass-Seal 461.
• National Electronic Alloys primarily stocks and distributes 46 Alloy.

ALLOY 45/46 MACHINABILITY DATA METAL FROM STOCK FLYER NICKEL IRON ALLOY COMPARISON CHART

TYPICAL NOMINAL CHEMISTRY

NICKEL (NI)	46.0
CHROMIUM(CR)	0.10
MANGANESE(MN)	0.80
SILICON (SI)	0.30
CARBON (C)	0.05
PHOSPHORUS (P)	0.025
SULFUR (S)	0.025
IRON	BALANCE

TYPICAL TENSILE STRENTGH

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

TYPICAL HARDNESS, ROCKWELL B

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

Controlled expansion alloys using compression or eylet brazed seals

Many other sizes available.

ALLOY 46 MACHINABILITY DATA METAL FROM STOCK FLYER

TYPICAL NOMINAL CHEMISTRY

NICKEL (NI)	46.0
CHROMIUM(CR)	0.10
MANGANESE(MN)	0.80
SILICON (SI)	0.30
CARBON (C)	0.05
PHOSPHORUS (P)	0.025
SULFUR (S)	0.025
IRON	BALANCE

TYPICAL TENSILE STRENTGH

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

TYPICAL HARDNESS, ROCKWELL B

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

TYPICAL LINEAR COEFFICIENT OF THERMAL EXPANSION (cm per cm C x 10-6)

30 to 100	8.2
30 to 200	7.9
30 to 300	7.5
30 to 350	7.4
30 to 400	7.5
30 to 425	7.6
30 to 450	7.9
30 to 500	8.6
30 to 550	9.3
30 to 600	9.8
30 to 700	10.7
30 to 800	11.6
30 to 900	12.5
30 to 1000	13.4

* PLEASE NOTE THIS IS A NOMINAL DATA SHEET

Controlled expansion alloys using compression or eylet brazed seals

 

OTHER SIZES AVAILABLE UPON REQUEST