Download or read book The 9Ni 4Co Steels written by T. P. Groeneveld and published by . This book was released on 1966 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This memorandum briefly discusses the physical metallurgy, heat treatment, mechanical properties, stress-corrosion properties, and fabrication of the 9Ni-4Co-XC steels. This family of steels was developed specifically to meet the requirements of the aircraft and aerospace industries for materials possessing high strength and high toughness. By varying the composition and heat treatment, the 9Ni-4Co-xC steels can develop strengths in the 200 to 300 ksi tensile-strength range and reportedly possess high toughness. The lower carbon grades have excellent weldability, developing strength in the 180 to 200 ksi range with high toughness without the need for preheat or postweld-heat treatment. (Author).
Download or read book Production Considerations Fabrication Experience and Properties of 9Ni 4Co Steels written by A. J. Hiller and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High strength Steel 9Ni 4Co written by and published by . This book was released on 1967 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DMIC Handbook on 9Ni-4Co steels presents available information and data covering the metallurgy, manufacturing, and mechanical properties of these steels. The metallurgical portion summarizes melting, primary working, and compositional aspects. The manufacturing portion covers forming, heat treating, and welding, each of which is a concern of the users of these steels. Mechanical properties presented include room and elevated-temperature tensile, fatigue, and limited compressive and shear data for the 0.25 and 0.45 carbon grades. Twenty-nine references are included. (Author).
Download or read book High strength steel 9Ni 4Co processes and properties handbook written by Batelle Memorial Institute, Columbus, Ohio. Defense Metals Information Center and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Strength Steel written by and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASRM Literature Review of HP 9Ni 4Co Steels and Assessment of Compositional Variations on Mechanical Properties and Weldability written by M. D. McAninch and published by . This book was released on 1991 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Mechanical Properties of 9Ni 4Co Steel Forgings written by D. F. Bulloch and published by . This book was released on 1968 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Material characterization data and design allowables were determined for two grades of the 9Ni-4Co steel group: 9Ni-4Co-0.30C quenched and tempered to 220-240 ksi tensile ultimate strength, and 9Ni-4Co-0.45C quenched to a bainitic structure with 260 to 280 ksi tensile ultimate strength. The effects of chemistry and processing variations on mechanical properties were evaluated by testing three heats of 9Ni-4Co-0.30C and four heats of 9Ni-4Co-0.45C. Both alloys were vacuum-arc-remelted with carbon deoxidation. Tension, compression, shear, and bearing allowables were developed per MIL-HDBK-5 guidelines in three grain directions at temperatures from -110F to 500F. The 9Ni-4Co-0.30C and 9Ni-4Co-0.45C were found suitable for aircraft structural forgings with minimum tensile ultimate strengths of 220 ksi and 260 ksi respectively. Material characterization data showed that both alloys have good stress corrosion resistance, competitive derived mechanical properties and fatigue properties, and satisfactory metallurgical stability. Grain direction did not significantly influence their mechanical properties. The 9Ni-4Co-0.30C showed superior plane-strain fracture toughness, whereas the 9Ni-4Co-0.45C compared favorably with other steels in the same strength range. Both showed excellent resistance when tested for delayed fracture in salt water. On the basis of the data obtained in this program, a proposed Military Material Specification was drafted for both alloys. (Author).
Download or read book Fractography in failure analysis written by W. H. Cullen and published by ASTM International. This book was released on 1978 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationships Between Structure and Properties in the 9Ni 4Co Alloy System written by S. J. Matas and published by . This book was released on 1965 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of alloy content and heat treatment on the strength and toughness of 9Ni-4Co alloy steels are discussed in detail. The strength was determined with standard tension specimens, while toughness was evaluated with various accepted, sharply notched specimen types. Of the alloying elements used, carbon acted as the strongest embrittler but was necessary as a strengthener. Silicon and the carbide-forming elements decreased toughness, particularly at higher carbon contents. Hence, the use of silicon at other than residual levels was undesirable. The addition of carbide-forming elements in appreciable amounts needed careful consideration. Nickel was used in substantial amounts to improve toughness, while cobalt was added to inhibit retained austenite formation consequent upon the high nickel content. Cobalt enhanced self-tempering effects, particularly for the lower carbon varieties. Heat treatment strongly influenced the properties as a result of the attendant changes in the microstructure. Isothermal transformation to lower bainite enhanced toughness in the 0.45%C, 9%Ni-4% Co high performance (HP) 9-4-45 steel. The toughness was superior to that of tempered martensite at equivalent strengths. The properties of upper bainite were not as attractive as those of lower bainite. Mixed structures composed of bainite and martensite lowered toughness. The two commercial grades of the 9Ni-4Co alloy system, HP 9-4-25 and HP 9-4-45, had a better combination of strength and toughness than other carbon-strengthened steels. The self-tempering characteristics of the HP 9-4-25 grade and its inherent toughness contributed to high joint efficiences and formability in the as-welded condition. No post-heat treatment of the welded joint was required.
Download or read book Stress Corrosion Evaluation of HP 9Ni 4Co 0 20C Steel written by Pablo D. Torres and published by . This book was released on 1993 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on the Third Maraging Steel Project Review written by Albert M. Hall and published by . This book was released on 1963 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of NRL Progress written by Naval Research Laboratory (U.S.) and published by . This book was released on 1970 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallic Materials and Elements for Aerospace Vehicle Structures written by and published by . This book was released on 1990 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Properties of Ultrahigh strength Steels written by and published by . This book was released on 1965 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Corrosion Evaluation of HP 9Ni 4Co 0 20C Steel written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-12 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A stress corrosion cracking (SCC) evaluation was undertaken on HP 9Ni-4Co-0.20C steel in support of the Advanced Solid Rocket Motor (ASRM) program. This alloy was tested in plate, bar, and ring forging forms. Several heat treating procedures yielded ultimate tensile strengths ranging from 1,407 to 1,489 MPa (204 to 216 ksi). The test environments were high humidity, alternate immersion in 3.5-percent NaCl, and 5-percent salt spray. Stress levels ranged from 25 to 90 percent of the yield strengths. The majority of the tests were conducted for 90 days. Even though the specimens rusted significantly in salt spray and alternate immersion, no failures occurred. Therefore, it can be concluded that this alloy, in the forms and at the strength levels tested, is highly resistant to SCC in salt and high humidity environments. Torres, Pablo D. Marshall Space Flight Center ...
Download or read book Stress Corrosion Evaluation of HP 9Ni 4Co 0 30C Steel written by Pablo D. Torres and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Military Handbook written by and published by . This book was released on 1990 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:
