42 Alloy Low Expansion Stencil Grade Alloys ASTM F30: Coil, Sheet, Hot Rolled Plate, Round Rod

ALLOY 42 & ASMT F30

42 Alloy Low Expansion Stencil Grade Alloys ASTM F30

42 Alloy, a low expansion alloy, is very similar to Invar 36 with a slightly different Coefficient of Thermal Expansion. This nickel-iron alloy is ideal for lid, lead frames, stencil/etching, telecommunications and aircraft industry, offering a more affordable alternative to Kovar when a tight seal is not required.

42 Alloy has a virtually constant low rate of thermal expansion at temperatures up to approximately 650°F (343°C). Easily machined and formed hot or cold, 42 Alloy is also used extensively in the medical, electronics and automotive industries.

Let National Electronic Alloys help you analyze your business needs and objectives. Our procurement side and supply side experience can save you money and ensure that you make the best possible purchasing decisions.


NOMINAL DATA SHEET
Physical Properties  
Specific gravity 8.12
Density, lbs. per cu. in. 0.293
Electrical resistivity, micro-ohm-cm 72


TYPICAL TENSILE STRENTGH
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


42 Alloy


Element
Percent by Weight
NICKEL(NI) 39/41%
CHROMIUM(CR) 0.05
MANGANESE(MN) 0.60
SILICON(SI) 0.02
CARBON(C) 0.05
COBALT(CO) 0.05
PHOSPHORUS(P) 0.02
SULFUR(S) 0.02
IRON(FE) REMAINDER
Note: Nickel varies to achieve the proper thermal expansion.


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


COIL FROM STOCK
Base – Lead Frame – Deep Draw & Chemical Milling Quality
.004 x 12 .0095 x 12 .025 x 12
.0045 x 12 .010 x 12 .030 x 12
.005 x 12 .010 x 16 (halfhard) .031 x 12
.006 x 16 .0142 x 12 .040 x 12.5
.0075 x 16 .015 x 12 .059 x 12.5
.008 x 16 .020 x 12 .061 x 1.75
Above slit to your width.


SHEET FROM STOCK
Thick.
Width
Length
.015
x
16"
x
72"
.020
x
24"
x
72"
.030
x
24"
x
72"
.040
x
24"
x
72"
.061
x
24"
x
72"
.100
x
24"
x
72"
.125
x
24"
x
72"
We can shear to your width.


PLATE FROM STOCK
Thick.
Width
Length
.180
x
16"
x
72"
.210
x
16"
x
72"
.250
x
16.5"
x
72"
.320
x
16"
x
63"
.375
x
16"
x
72"
.390
x
16.5"
x
72"
.437
x
16.5"
x
72"
.450*
x
16.5"
x
72"
.500
x
16.5"
x
72"
.625
x
16.5"
x
72"
.750
x
16.5"
x
72"
1
x
16"
x
72"
2
x
4.25"
x
48" Billet
We have shearing and saw cutting capabilities for plate.
*Large Pieces Up To .450" x 92" to 98" Wide x 228" to 268" Long Plate Available
Certified To ASTM F30 & Mil I230IIC Class 5 • All Above Available From Stock


ROUND ROD
.088" Diameter .125" Diameter .156" Diameter
.1875" Diameter .250" Diameter .312" Diameter
.375" Diameter .437" Diameter 1.00" Diameter
*Custom sizes available upon request



42 alloy is a less expensive alternative to Kovar when a high integrity seal is not necessary. Normally sealed as a compression seal using leaded glass.


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