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Magnetic strips and methods for making the same

  • US 5,611,872 A
  • Filed: 03/28/1995
  • Issued: 03/18/1997
  • Est. Priority Date: 08/30/1993
  • Status: Expired due to Term
First Claim
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1. A thin magnetic strip that exhibits superior magnetic properties, comprising a ferrous alloy strip having a thickness of between 0.0005 and 0.003 inches, said strip consisting essentially of iron, from about 0.45 to about 0.7 weight percent carbon, from about 2.5 to about 7 weight percent chromium, from about 0.1 to about 2 weight percent molybdenum, and optionally from about 0.05 to about 0.7 weight percent vanadium, from about 0.3 to about 1.2 weight percent manganese, and from about 0.3 to about 1 weight percent silicon, said strip being essentially free of cobalt, said strip having a coercive level of at least about 35 oersteds and a residual induction of at least 7,000 gauss.

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