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Alloy 42-6 Controlled Expansion Alloy

Alloy 42-6 (aka Glass Seal 42-61) is a controlled expansion alloy, consisting of 42% Nickel, 6% Chromium, balance Iron; used in a wide variety of electronic applications, especially for glass seals.

Alloy 42-6 Products

Because Alloy 42-6 is not a commonly used alloy, Ed Fagan Europe Ltd. does not maintain a regular stock of this alloy in the same variety of forms and conditions that we do for the other families of controlled and low expansion alloys. If you require Alloy 42-6, please call us. We may very well have what you are looking for in stock, and if we don’t, we can certainly source it for you.

Applications

Glass to metal seals for a variety of electronic tubes and CRT tubes.

Alloy 42-6 Properties

 

Alloy 42-6 Physical Properties

Density

lb/cu in

0.293

Specific Gravity

 

8.12

Curie Temp

°F

560

 

°C

293

Melting Point

°F

2600

 

°C

1427

Electrical Resistivity

Micro-ohm-cm

97

 

ohm-cir mil/ft

570

Thermal Conductivity

W/cm °C

0.13

 

BTU-in/sq. ft-hr-

87

Specific Heat

Cal/g- °C

0.12

 

BTU/lbm- °F

0.12

Thermal Expansion

ppm / °F (75°F to 842°F)

5.9

 

ppm / °C (25°C to 450°F)

10.6


 

Alloy 42-6 Mechanical Properties

Tensile Strength

ksi

80

 

MPa

552

Yield Strength

ksi

40

 

MPa

276

Elongation

% in 2 in.

30

Typical Hardness Ann.

Rockwell HRB

80

Modulus of Elasticity

Mpsi

23

 

kMPa

159


Alloy 42-6 Chemistry

maximum % unless noted

Iron

Bal

Nominal Nickel

42

Nominal Cobalt

--

Carbon

0.07

Silicon

--

Sulfur

0.025

Chromium

5.6 nom.


 

Alloy 42-6 Specifications

ASTM F-30

MIL 1-23011 CL 6


 

Alloy 42-6 Linear Coefficient of Thermal Expansion

Degree C

 

Degree C

 

30-100

--

30-450

10.6

30-150

--

30-475

--

30-200

--

30-500

11.2

30-250

--

30-525

--

30-300

8.2

30-550

11.7

30-325

--

30-600

12.2

30-350

8.5-9.2

30-700

13.0

30-375

--

30-800

13.7

30-400

10.0

30-900

14.6

30-425

9.7-10.4

30-1000

15.4

Underscored face values are the limits specified in MIL-I-23011C

 

 

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

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