DEVELOPMENT OF HIGH INTEGRITY CLOSE TOLERANCE HIGH STRENGTH AIRCRAFT QUALITY STEEL CASTINGS.
Abstract
A program to improve the mechanical properties of cast 5% chromium steel was carried out. vacuum degassing of air melted material of a composition based on that of wrought H-11 hot work die steel did not exhibit any significant benefits. A modified 5% chromium steel containing no vanadium and 2.4% molydbenum had good tensile properties and excellent toughness in cast one-inch sections. Investigation of the properties of cast 18 percent nickel maraging steel revealed that this material has high toughness and ductility in cast one-inch sections. Cast sections of maraging steel of two inches and greater exhibited a defect which seriously impaired tensile properties. Experiments to identify or eliminate the defect were unsuccessful. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1964
- Accession Number
- AD0434383
Entities
People
- Hugo R. Larson
- John B. Dabney