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Alloy 42 Controlled Expansion Alloy

Alloy 42 (aka Pernifer 402, NILO 424, and Glass Seal 421) is a controlled expansion alloy, consisting of 42% Nickel, balance Iron; used in a wide variety of electronic application, lead frames, especially for glass and ceramic seals.

Alloy 42 Products

Ed Fagan Europe Ltd. stocks alloy 42 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 42 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 42 to your exact specifications, and we also have tremendous versatility when it comes to custom sizes, packages, and unusual materials.


Alloy 42 Sheet Annealed

Alloy 42 Sheet Thickness

Alloy 42 Sheet Thickness

0.508 mm Alloy 42 Sheet

1.270 mm Alloy 42 Sheet

0.762 mm Alloy 42 Sheet

1.524 mm Alloy 42 Sheet

1.016 mm Alloy 42 Sheet

2.540 mm Alloy 42 Sheet


Alloy 42 Plate Annealed

Alloy 42 Plate Thickness

6.858 mm Alloy 42 Plate


Alloy 42 Strip/Coil Annealed

Alloy 42 Strip/Coil Thickness

Alloy 42 Strip/Coil Thickness

0.254 mm Alloy 42 Strip/Coil

0.762 mm Alloy 42 Strip/Coil

0.508 mm Alloy 42 Strip/Coil

1.016 mm Alloy 42 Strip/Coil

 

Alloy 42 Rod -- Made to Your Custom Size

Applications

Glass to metal seals for a wide variety of electronic tubes, hermetic packages, and automotive and industrial lamps.

Alloy 42 Properties

 

Alloy 42 Physical Properties

Density

lb/cu in

0.293

Specific Gravity

 

8.12

Curie Temp

°F

716

 

°C

380

Melting Point

°F

2600

 

°C

1427

Electrical Resistivity

Micro-ohm-cm

68

 

ohm-cir mil/ft

400

Thermal Conductivity

W/cm °C

0.11

 

BTU-in/sq. ft-hr-

74.5

Specific Heat

Cal/g- °C

0.12

 

BTU/lbm- °F

0.12

Thermal Expansion

ppm / °F (75°F to 842°F)

3.9

 

ppm / °C (25°C to 450°F)

7.0

 

 

Alloy 42 Mechanical Properties

Tensile Strength

ksi

82

 

MPa

566

Yield Strength

ksi

34

 

MPa

235

Elongation

% in 2 in.

30

Typical Hardness Ann.

Rockwell HRB

80

Modulus of Elasticity

Mpsi

21.5

 

kMPa

148

 

Alloy 42 Chemistry

maximum % unless noted

Iron

Bal

Nominal Nickel

41

Nominal Cobalt

--

Carbon

0.05

Silicon

0.30

Sulfur

0.025

Chromium

0.025

 

 

Alloy 42 Specifications

ASTM F-30

MIL 1-23011 CL 5

AMS 1-23011 CL 5

 

 

Alloy 42 Linear Coefficient of Thermal Expansion

Degree C

 

Degree C

 

30-100

4.8

30-450

6.7 - 7.4

30-150

4.6

30-475

--

30-200

4.5

30-500

8.0

30-250

4.5

30-525

--

30-300

4.0 - 4.7

30-550

8.8

30-325

4.7-

30-600

9.5

30-350

5.0

30-700

10.5

30-375

5.5

30-800

11.4

30-400

6.0

30-900

12.3

30-425

--

30-1000

13.2

 

ED FAGAN Europe Ltd. supplies the highest quality special purpose metals and alloys 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