Nickel-Iron Sealing Alloys

Alloy 42

  • UNS K94100
  • ASTM F30

Alloy 52

  • UNS N14052
  • ASTM F30
Additional specifications by request

Application

Electronic components, cathode ray tubes, resistors.

Chemical Composition (Nominal %)

Alloy 42

41 Ni nominal, 0.80 Mn max, 0.30 Si max, 0.05 C max, 0.25 Cr max, 0.025 P max, 0.025 S max, 0.10 Al max, Balance Fe

Alloy 52

50.5 Ni nominal, 0.60 Mn max, 0.30 Si max, 0.05 C max, 0.25 Cr max, 0.025 P max, 0.025 S max, 0.10 Al max, Balance Fe

Cobalt (incidental element to be reported separately)

Physical Characteristics

Density

  • .297 lb/in³
  • Alloy 42
  • .300 lb/in³
  • Alloy 52

Tempers

*KSI = 1000 psi
Rockwell 30T Grain Size (nominal) Tensile KSI*
Annealed 31 - 46
40 - 58
0.035 mm
0.015 mm
¼ hard 61 - 71 58 - 72
½ hard 67 - 74 66 - 80
hard 72 - 76 75 - 88
extra hard 73 - 77 80 - 92
spring 74 - 77 84 - 94

Sheet/Coil Sizes

Thickness

.002" - 0.125"

Width in coil

8.00" max

Width in length

12.50" max

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