Accession Number:

AD0694939

Title:

FRACTURE TOUGHNESS CHARACTERISTICS OF THE NEW WELDABLE STEELS OF 180- TO 210-Ksi YIELD STRENGTHS,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Puzak,P. P.
• Lange,E. A.

Report Date:

1969-09-18

Pagination or Media Count:

31.0

Abstract:

The yield strength range for steels from 180 to 210 ksi is currently covered by four weldable alloys of the following nominal chemical analysis 18Ni-8Co-3Mo maraging steel, 12Ni-5Cr-3Mo maraging steel, 9Ni-4Co-0.20C quenched and tempered Q and T steel, and 10Ni-8Co-2Cr-1Mo-0.10C Q and T steel. Broad ranges of fracture resistance have been reported for these materials based on various fracture tests, and this report presents information for material selection and design guidance by providing an analysis of the interactions between the metallurgical and mechanical parameters that contribute to the fracture resistance of plate products. Definitions of the interaction between the metallurgical and the mechanical aspects are developed with the use of the Dynamic Tear DT test and the Ratio Analysis Diagram RAD. Author

Descriptors:

• *STRUCTURAL COMPONENTS
• *STAINLESS STEEL
• *MARAGING STEELS
• WELDING
• NOTCH TOUGHNESS
• NOTCH TOUGHNESS
• CRACKS
• YIELD POINT
• HEAT TREATMENT
• MELTING
• TENSILE PROPERTIES

Subject Categories:

• Metallurgy and Metallography
• Fabrication Metallurgy
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE