aircraftmaterials.com
 

E-mail sales@quantumalloys.com

Tel. 44(0)1494 484844 Fax. 44(0)1494 482155

Home

aircraftmaterials.com
 
 

Request for Quotation

| AVAILABILITY |

42 Alloy (ASTM F30)

Binary alloy with low thermal expansion coefficient.

Used on:

Leadframes for integrated circuits, thermostatic bi-metal strips and glass to metal seals.

NOMINAL DATA SHEET

Alloy 42 Physical Properties

Specific gravity 8.12
Density, lbs. per cu. in. 0.293
Electrical resistivity, micro-ohm-cm 72

Typical Tensile Strength 
(1,000 PSI)

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

 

Top of Page

 

 

Elements
Percent by Weight
NICKEL (NI) 39/41%
CHROMIUM (CR) 0.05
MANGANESE (MN) 0.60
SILICON (SI) 0.02
CARBON (C) 0.05
ALUMINUM (AL) 0.02
COBALT (CO) 0.05
PHOSPHORUS (P) 0.02
SULFUR (S) 0.02
IRON (FE) REMAINDER

Note: Nickel varies to achieve the proper thermal expansion.

Top of Page

ALLOY 42 TYPICAL
LINEAR COEFFICIENT OF THERMAL EXPANSION

(cm. per cm. C x 10 - 6)

30 to 100

4.8
30 to 200 4.5
30 to 300 4.5
30 to 350 5.0
30 to 400 6.0
30 to 425 N/A
30 to 450 7.0
30 to 500 8.0
30 to 550 8.8
30 to 600 9.5
30 to 700 10,.5
30 to 800 11.4
30 to 900 12.3
30 to 1000 13.2
OTHER SIZES AVAILABLE UPON REQUEST

42 alloy is a less expensive alternative to Kovar when a high integrity seal is not necessary. 

 

42 alloy is normally sealed as a compression seal using leaded glass.

 

Top of Page

Disclaimer    

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

 
 

Site © 2005 Quantum Alloys Ltd

Group Companies AircraftMaterialsUK.com Ltd