DESIGN PROPERTIES OF HIGH STRENGTH STEELS IN THE PRESENCE OF STRESS CONCENTRATIONS. PART I. DEPENDENCE OF TENSION AND NOTCH-TENSION PROPERTIES OF HIGH-STRENGTH STEELS ON A NUMBER OF FACTORS. Period covered September 1, 1955 to August 31, 1956

Technical Report · Sat Dec 01 04:00:00 EST 1956

OSTI ID:4313471

Muvdi, B B; Sachs, G; Klier, E P

In this report are presented the results of tension and notch-tension tests performed on hot-rolled sections from commercial, electric furnace heats of 4340, V-Mod. 4330, 98B4O, Tricent (Inco), Super Hy-Tuf, Hy-Tuf and Super TM-2 steels. Tension tests were conducted on 0.28 in. diam. specimens. An exception was a single test completed on a smooth 0.9 in. diam. 4340 steel specimen in order to examine the effect of section size on the tension properties of this steel. Notch-tension tests were performed on 0.3, 0.5, and 0.9 in. diam. specimens that were heat treated to strength levels ranging between 180,000 and 300,000 psi approximately. These specimens were provided with notches leading to stress-concentration factors, K, of 3, 5, and 10. In both instances (tension and notch-tension tests) longitudinal and transverse specimens were examined. furthermore, information from the literature pertaining to the effects of as- processed section size is considered and evaluated. In general, the tensile strength was found to be independent of the specimen orientation, but to decrease gradually with increase in the specimen size. The ductillty of smooth specimens, however, was observed to depend on both specimen orientation and specimen size. The notch strength decreased wlth increase in stress concentration, specimen diameter and as-processed section size. It also decreased as the specimen orientation was changed from longitudinal to transverse. These effects were pronounced at high strength levels and diminished, with decrease in the tensile strength, to insignificant values at strength levels below 200,000 psi. (auth)

• Research Organization: Syracuse Univ., N.Y.
• NSA Number: NSA-12-004198
• OSTI ID: 4313471
• Report Number(s): WADC-TR-56-395(Pt.I); AD-11063
• Country of Publication: United States
• Language: English

Related Subjects

CRYSTALS
DUCTILITY
ELECTRICITY
FURNACES
HEAT TREATMENTS
HOT WORKING
MATERIALS TESTING
MINERALOGY, METALLURGY, AND CERAMICS
NOTCHES
PLANNING
ROLLING
STEEL-SAE-4340
STEELS
STRESSES
TENSILE PROPERTIES