Alloy 48 Controlled Expansion Alloy

Alloy 48 (aka Pernifer 48², NILO 48⁴, and Glass Seal 48¹) is a controlled expansion alloy, consisting of 48% Nickel, balance Iron; used in a variety of electronic application, especially for glass and ceramic seals.

Alloy 48 Products

Ed Fagan Europe Ltd. stocks alloy 48 in a variety of forms and dimensions. Below are most of the standard stock form/sizes. If you do not see the size or form of alloy 48 that you require, please call one of our materials experts; our sales people are very knowledgeable and can assist you. We can cut, slit, shear, or center less grind alloy 48 to your exact specifications, and we also have tremendous versatility when it comes to custom sizes, packages, and unusual materials.

Alloy 48 Strip/Coil Annealed
Alloy 48 Strip/Coil Thickness	Alloy 48 Strip/Coil Thickness
0.025 mm Alloy 48 Strip/Coil	0.355 mm Alloy 48 Strip/Coil
0.050 mm Alloy 48 Strip/Coil	0.381 mm Alloy 48 Strip/Coil
0.076 mm Alloy 48 Strip/Coil	0.889 mm Alloy 48 Strip/Coil
0.101 mm Alloy 48 Strip/Coil	1.270 mm Alloy 48 Strip/Coil
0.127 mm Alloy 48 Strip/Coil	1.524 mm Alloy 48 Strip/Coil
0.254 mm Alloy 48 Strip/Coil	1.549 mm Alloy 48 Strip/Coil
0.330 mm Alloy 48 Strip/Coil	2.032 mm Alloy 48 Strip/Coil

Alloy 48 Rod
Alloy 48 Rod Diameter	Alloy 48 Rod Diameter
1.574 mm Alloy 48 Rod	15.875 mm Alloy 48 Rod
3.556 mm Alloy 48 Rod	19.050 mm Alloy 48 Rod
6.350 mm Alloy 48 Rod	28.575 mm Alloy 48 Rod
12.70 mm Alloy 48 Rod

Applications

Glass to metal seals for variety of electronic tubes and hermetic devices.

Alloy 48 Properties

Alloy 48 Physical Properties
Density	lb/cu in	0.298
Specific Gravity		8.25
Curie Temp	°F	880
	°C	471
Melting Point	°F	2600
	°C	1427
Electrical Resistivity	Micro-ohm-cm	49
	ohm-cir mil/ft	290
Thermal Conductivity	W/cm °C	0.13
	BTU-in/sq. ft-hr-	90
Specific Heat	Cal/g- °C	0.12
	BTU/lbm- °F	0.12
Thermal Expansion	ppm / °F (75°F to 842°F)	5.0
	ppm / °C (25°C to 450°F)	9.0

Alloy 48 Mechanical Properties
Tensile Strength	ksi	79
	MPa	545
Yield Strength	ksi	36
	MPa	248
Elongation	% in 2 in.	30
Typical Hardness Ann.	Rockwell HRB	80
Modulus of Elasticity	Mpsi	23
	kMPa	159

Alloy 48 Chemistry
maximum % unless noted
Iron	Bal
Nominal Nickel	48
Nominal Cobalt	--
Carbon	0.05
Silicon	0.30
Sulfur	0.025
Chromium	0.025

Alloy 48 Specifications
ASTM F-30	MIL 1-23011 CL 3	AMS 1-23011 CL 3

Alloy 48 Linear Coefficient of Thermal Expansion
Degree C		Degree C
30-100	9.4	30-450	9.0
30-150	9.4	30-475	9.3
30-200	9.4	30-500	9.4
30-250	9.3	30-525	--
30-300	8.8	30-550	9.6 - 10.3
30-325	--	30-600	10.4
30-350	9.0	30-700	11.3
30-375	--	30-800	12.1
30-400	8.2 - 9.2	30-900	13.0
30-425	8.9	30-1000	13.9

ED FAGAN Europe Ltd. supplies the highest quality special purpose alloys and metals for Aerospace/Aviation, Defence, Magnetic, Electronics, Telecommunications, Lighting, Optical, Ceramics, Heat Treating, Medical, and other high-technology industries.

1. Trademark Carpenter Technology Corp., Reading PA
2. Trademark ThyseenKrupp-VDM, Germany
4. Trademark Special Metals Corporation, USA

Controlled Expansion Alloys

Ed Fagan Europe Ltd. stocks a variety of similar alloys for low expansion, controlled expansion, glass-to-metal or ceramic sealing applications that may also satisfy your needs. EFI carries:
Invar
Kovar
42 Alloy
42-6 Alloy
46 Alloy
48 Alloy
52 Alloy

And we also have a large selection of other types of specialty metals and alloys for high technology applications, including:
Electrical/Electronic Nickel
Soft Magnetic Alloys
Refractory Metals and Alloys
Hard to Find Materials