Dumet Wire, Glass-to-Metal Seal, 0.35mm (.014") x 100'

One 100' spool of glass-to-metal sealing Dumet wire. Wire is cleaned, ready to use and furnished on a 2" plastic spool.

Dumet wire is composed of a nickel-iron core in an oxygen-free copper sheath and it forms a vacuum-tight glass-to-metal seal against soda-lime and lead glasses.

• Material: Dumet (Nickel-Iron, Copper)
• Diameter: 0.35mm ±.01 (0.014" ±.0004)
• Length: 100' (30m) min.
• Net Weight: 27g
• Finish: Borated
• Sheath Composition: Cu 99.96% min. with 0.00% Oxygen
• Core Composition:

  Ni 41-43%	C .05% max	Mn 1.0% max	Si .30% max
  S .02% max	P .02% max	Fe Rest

Storage: Dumet wire should be stored away from moisture.

Cleaning: Prior to assembly / beading, Dumet wire that has been handled can be cleaned chemically in deionized water with 60% formic acid and 10% hydrogen peroxide. The copper surface must be smooth and free of scratches (if needed the surface may be re-polished using a suspension of fine alumina powder in distilled water).