Nitinol in 1970s: Orthodontic archwires · 522
Read the condition on Nitinol before the nickname. Year 1970s, line “Orthodontic archwires,” figure 1. Nitinol (NiTi (~50/50 at.%)) is a family of grades whose density ~6.45 g/cm³, heat band ~1310 °C, and fire letter A1 metal.
Scores compare Nitinol with the rest of the atlas on strength, heat, fire behaviour, insulation, workability and circularity. They are editorial, not certificates. Seven chapters follow. Fire and insulation claims name test families (Euroclass, ASTM E84, ISO 5660, KS F) rather than inventing a single safety number.
Nitinol is sold as grades, not as a single substance. Chemistry NiTi (~50/50 at.%), density ~6.45 g/cm³, heat band ~1310 °C. This atlas treats Nitinol as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: ~10–18 W/m·K. Insulation score 12/100 is relative to 32 entries — metals lose, VIPs and aerogels win.
Fire letter in editorial use: A1 metal. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide. Origin: NOL 1959 Buehler, United States. The process chapter follows feedstock → conversion → forming → finish → install. Uses span buildings to defence / safety. Pairings matter: titanium.
The label keeps Nitinol, 1970s, and 1. “Orthodontic archwires” is the condition on the figure.1970s
Figures to keep
- Year of the condition
- 1970s
- Property figure
- 1
- Material
- Nitinol
- Use line
- Orthodontic archwires
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