Austenitic nickel alloy

US5417918A · kind A · utility

Assignee

• Krupp VDM GmbH · DE

Inventors

• Michael Köhler · Uster, CH
• Ulrich Heubner · Werdohl, DE

Key dates

• Filing date: Feb 2, 1993
• Grant date: May 23, 1995
• Expiry date: Feb 2, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C19/056
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to an austenitic nickel-chromium-molybdenum alloy having high resistance to general corrosion, crevice, pitting and stress crack corrosion and also intercrystalline corrosion, consisting of (in % by weight): PA1 carbon: up to 0.01% PA1 silicon: up to 0.05% PA1 manganese: up to 0.50% PA1 phosphorus: up to 0.020% PA1 sulphur: up to 0.010% PA1 chromium: 14.0 to 18.0% PA1 molybdenum: 14.0 to 18.0% PA1 cobalt: up to 2.0% PA1 tungsten: up to 0.5% PA1 calcium 0.001 to 0.010% PA1 magnesium: 0.001 to 0.020% PA1 aluminium: 0.05 to 0.30% PA1 nitrogen: up to 0.02% PA1 iron: up to 3.0% PA1 copper: up to 0.5% PA1 titanium: up to 0.01% PA0 residue nickel and usual impurities due to melting, the sum of the contents (carbon+silicon+titanium) being limited to 0.05% at the most, and the sum of the elements (calcium+magnesium+aluminium) being adjusted within the limits 0.055 to 0.33%.