Blade Material

1. Blade Material

1) Basic Elements

  • Fe: Iron  
  • C: Carbon
  • Cr: Chrome 
2) Material Properties
  • Iron: less than 0.025% Carbon (C) + Iron (Fe)
  • Steel: 0.025% ~ 2.0% Carbon (C) + Iron (Fe)
  • Cast Iron: 2.0% ~6.67% Carbon(C) + Iron (Fe)

 3) Stainless Steel

  • 025% ~ 2.0% Carbon (C) + Chrome (Cr) more than 12% + Iron (Fe)
  • Invented in 1913 by H. Brearley

4) Metal Ingredients

  • Out of 92 natural elements, 68 are metals.
  • Possibility to create metal alloys with modern technology.
  1. Create 300+ alloys by mixing 2 elements.
  2. Create 15,000+ alloys by mixing 3 elements

There may be some numerical differences depending on the country or the scholar. We used general data.

 

2. Classifications of Stainless Steel

1) Ferritic Stainless Steel  

     Ex) mufflers, exhaust systems, kitchen counters, and sinks

2) Martensitic Stainless Steel

    Ex) machine parts, aircraft parts, knives, bearing

3) Austenitic Stainless Steel

    Ex) chemical plants, power plants, food processing, and dairy equipment. 

 

3. Microscopic Test of Stainless Steel

 

4. Usage of Stainless Steel in Hair Scissors

1) Martensitic Stainless Steel

         Ex) 420-J2, 440-A, 440-C

 2) Austenitic Stainless Steel

         Ex) 304, 316L

3) Ferritic Stainless Steel

         Ex) 430

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