Heatseal 29 (For Springs)

Tech Spring Manufacturing Corp. is a high quality Metal Spring Manufacturer in Taiwan, offering Wave Springs, Retaining Rings and Constant Force Spring with good quality and reasonable price.

Heatseal 29 (For Springs)

A Nickel-Iron-Cobalt alloy having a controlled expansion coefficient. Its expansion with temperature rise is less than that of 80/20 NiCr. It can be used for any TSMC spring product such as wave springs, retaining rings and compression springs.

Nickel-Iron-Cobalt Base Wire for wire springs, flat springs and wire products

Key Features
  • Having low expansion as it’s temperature increases makes it an ideal heating element wire for heat sealing (plastic bag welding) over a long straight length.
Typical Applications

Heat sealing (plastic bag welding) long lengths of plastic bags where low expansion of the wire is important to ensure straightness of the weld. Examples include heat sealing plastic bags for bed mattress’s.

Approx. Operating Temperature

up to +400°C
up to +750°F

Chemical Composition
Element Ni Cr Fe Mn C Cu Si Co Ti Al Mo Mg Zr
Min % 29.00
Max % 0.20 0.50 0.04 0.20 0.20 0.10 0.10 0.20 0.10 0.10
Wire Type
  • Round
  • Flat Wire
  • Rope/Strand
  • AWS 094
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