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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