Low Expansion 49

UNS #K94840

Low expansion 49 is a 49% Nickl-iron alloy with a consistently low rate of thermal expansion and is matched well for the glass-to-metal seal for fiber optics connections.

Type Analysis

  • Carbon (Maximum) 0.03
  • Silicon (Maximum) 0.25
  • Nickel (Nominal) 48
  • Manganese (Maximum) 0.4
  • Iron (Nominal) Balance

Applications

Glass sealing of fiber optics and high permeability magnetic applications

Applicable Specifications

  • ASTM A753

Bar

Billet

Coil

Rounds

Strip

Sheet

Wire

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