Method of manufacturing an article of non-magnetic austenitic alloy steel for a drill collar
US4514236A · kind A · utility
8Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1983 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Mar 1, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A non-magnetic austenitic alloy steel capable of producing the magnetic properties required in items such as Drill Collars in the as-rolled or as-rolled and direct quenched condition. The steel composition includes by weight up to 0.5% carbon from 10 to 25% manganese, up to 20% chromium, not less than 0.2% nitrogen and from 0.2% nitrogen and from 0.2 to 2.0% vanadium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.