Clothing ornament made from a high-Mn austenitic stainless steel
US8703047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
As a stainless steel for a metal part for clothing ornament capable of working into a complicated form part and having such nonmagnetic properties that the worked part can cope with the detection through needle detecting device is provided a high-Mn austenitic stainless steel having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.03 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass %, provided that these components are contained so that δ cal (mass %) represented by the following equation (1) is not more than 5.5 mass %:δ cal (mass %)=(Cr+0.48Si+1.21Mo+2.2(V+Ti)+0.15Nb)−(Ni+0.47Cu+0.11Mn−0.0101Mn2+26.4C+20.1N)−4.7 (1)and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.