Fort Wayne Metals manufactures wire products from various grades of Nickel-Titanium or Nitinol commonly used in medical applications (Nitinol #1, Nitinol #2, Nitinol #4 and Nitinol #8) as well as Nitinol #5, Nitinol #6, and Nitinol #9 for other various applications. All grades of Nitinol are available in either the cold worked (CW) condition ready for heat treatment or as straightened super-elastic (SE) wire. A newer technique yielding unique mechanical characteristics for Nitinol has been developed by Fort Wayne Metals called Dynamic Plateau Strength (DPS). This process is available as well. If you need an exceptionally smooth surface we suggest Silk™ Nitinol Wire, which achieves a surface texture of 3µin RMS without mechanical or electropolishing.
Each medical grade of Nitinol material is comprised of near equal atomic weight percentage of nickel and titanium. Our most common medical grade, NiTi#1 exceeds chemistry requirements set forth by ASTM F2063 for use in surgical implants. At Fort Wayne Metals, all incoming Nitinol raw materials are inspected to ensure they meet proprietary internal specifications for chemistry, ingot transformation temperature, material homogeneity, and microstructure. Optimized to promote an exceptionally smooth and uniform surface finish quality, all wire products utilize a proprietary single and multi crystalline diamond drawing die technology. Medical grade Nitinol wire may be purchased in the cold worked (CW) or the super-elastic condition (SE) and after the correct super-elastic heat treatment will accommodate strain up to 8% without permanent kinking at body temperature. The transformation temperatures and mechanical properties for each of our three standard grades of Nitinol are presented in the table at the bottom of the page.