42 Alloy Low Expansion Stencil Grade Alloys ASTM F30: Coil, Sheet, Hot Rolled Plate, Round Rod
ALLOY 42 & ASTM 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.
| Physical Properties |
|
| Specific gravity |
8.12 |
| Density, lbs. per cu. in. |
0.293 |
| Electrical resistivity, micro-ohm-cm |
72 |
| 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 |
|
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
|
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. |
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. |
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 |
| .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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