A New Alloy Steel for Marine Cryogenic Applications

1972 ◽  
Vol 9 (03) ◽  
pp. 297-301
Author(s):  
G. E. Kampschaefer ◽  
F. E. Havens ◽  
D. A. Sarno
Keyword(s):  
Heat Treatment ◽  
Alloy Steel ◽  
High Strength ◽  
Notch Toughness ◽  
Nickel Steel ◽  
Percent Nickel ◽  
Joint Properties ◽  
Filler Metals

The authors describe a new five percent nickel steel which is currently being considered for marine cryogenic applications involving the transport of liquefied ethylene and methane. The alloy combined with a unique heat treatment develops both high strength and good notch toughness properties at temperatures below —150 F. Results of weld tests are presented which show that filler metals and processes used for nine percent nickel steel produce adequate joint properties with this new economical alloy.

scholarly journals Effect of Heat Treatment in the Ferrite-Austenite Region on Notch Toughness of 6% Nickel Steel

1973 ◽  
Vol 59 (6) ◽  
pp. 752-763 ◽  
Author(s):  
Seinosuke YANO ◽  
Hiroshi SAKURAI ◽  
Hisoshi MIMURA ◽  
Nobuo WAKITA ◽  
Tsutomu OZAWA ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Notch Toughness ◽  
Nickel Steel

Comparison of Microstructure and Mechanical Properties of Additively Manufactured and Conventional Maraging Steel

2020 ◽  
Vol 405 ◽  
pp. 133-138
Author(s):  
Ludmila Kučerová ◽  
Andrea Jandová ◽  
Ivana Zetková
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Maraging Steel ◽  
Precipitation Hardening ◽  
High Strength ◽  
Hardness Measurement ◽  
Nickel Steel ◽  
Heat Treated ◽  
Good Material ◽  
Iron Nickel

Maraging steel is an iron-nickel steel alloy, which achieves very good material properties like high toughness, hardness, good weldability, high strength and dimensional stability during heat treatment. In this work, maraging steel 18Ni-300 was manufactured by selective laser melting. It is a method of additive manufacturing (AM) technology, which produces prototypes and functional parts. Sample of additively manufactured and conventional steel with the same chemical composition were tested after in three different states – heat treated (as-built/as-received), solution annealed and precipitation hardened. Resulting microstructures were analysed by light and scanning electron microscopy and mechanical properties were obtained by hardness measurement and tensile test. Cellular martensitic microstructures were observed in additively manufactured samples and conventional maraging steel consisted of lath martensitic microstructures. Very similar mechanical properties were obtained for both steels after the application of the same heat treatment. Ultimate tensile strengths reached 839 – 900 MPa for samples without heat treatment and heat treated by solution annealing, the samples after precipitation hardening had tensile strengths of 1577 – 1711 MPa.

Influence of Deformation and Heat Treatment on the Microstructure and Properties of High-Strength Low-Alloy Steel with Boron

2018 ◽  
Vol 48 (8) ◽  
pp. 536-540
Author(s):  
M. Yu. Matrosov ◽  
P. G. Martynov ◽  
A. V. Mitrofanov ◽  
K. Yu. Barabash ◽  
N. I. Kamenskaya ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Alloy Steel ◽  
High Strength ◽  
Low Alloy Steel ◽  
Microstructure And Properties ◽  
Deformation And Heat Treatment

Composition, Microstructure and Properties of Ultra-High-Strength Steel for Offshore Structural Application

2016 ◽  
Vol 867 ◽  
pp. 8-13
Author(s):  
Xiang Wang ◽  
Xiao Long Li ◽  
Han Jun Yin ◽  
Li Quan Wang ◽  
Hai Xia Gong
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Alloy Steel ◽  
Steel Specimen ◽  
High Strength ◽  
Intermediate Frequency ◽  
Tempering Temperature ◽  
Tensile Tester ◽  
Strength Alloy ◽  
Heating Up

In this paper, first, based on the employing environment and properties requirement of offshore platform, the influence of various alloying elements on the performance of steel was analyzed and chemical composition of a new ultra-high-strength alloy steel was designed. Then, the designed alloy steel specimen has been prepared using intermediate frequency induction furnace. Austenization temperature of the steel was determined through thermal dilatometer. The effects of quenching and tempering process on microstructure and mechanical properties of the steel were studied by means of optical microscopy (OM), scanning electron microscopy (SEM), durometer and universal material tensile tester. The research results indicated that the casting microstructure of the designed steel was a duplex structure of martensite and acicular bainite. The austenitizing onset temperature (Ac1) and termination temperature (Ac3) was 700°C and 790°C, respectively. With the increase of the austenitizing temperature, the hardness of the steel first increased until it reached the maximum value at 860°C and then decreased above 860°C. Meanwhile, the hardness of the steel decreased with the increasing of the tempering temperature in the range 150°C-500°C. The optimal heat-treatment processes were concluded as follows: heating up to 860°C, quenching by oil, and then tempering at 170°C. The superior mechanical properties of tensile strength of 1400MPa and elongation of 6.5% as well as the microstructure of tempered martensite were obtained after this heat treatment.

Effects of Post-Weld Heat Treatment on the Microstructure and Toughness of Flash Butt Welded High-Strength Low-Alloy Steel

2018 ◽  
Vol 49 (4) ◽  
pp. 1276-1286 ◽  
Author(s):  
Nikhil Shajan ◽  
Kanwer Singh Arora ◽  
Brajesh Asati ◽  
Vikram Sharma ◽  
Mahadev Shome
Keyword(s):  
Heat Treatment ◽  
Alloy Steel ◽  
High Strength ◽  
Post Weld Heat Treatment ◽  
Low Alloy Steel ◽  
Weld Heat

VASCOMAX 350 CVM

Alloy Digest ◽  
1970 ◽  
Vol 19 (5) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
High Strength ◽  
Heat Treating ◽  
Notch Toughness ◽  
High Yield ◽  
High Yield Strength ◽  
Temperature Performance ◽  
Ultra High Strength Steel ◽  
Yield Strength Level

Abstract VascoMax 350 CVM is an ultra-high-strength steel responding to a maraging heat treatment. It has superior notch toughness and ductility at the high yield strength level of 340,000 psi and above. It is recommended for aerospace and rocket equipment and structures. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-251. Producer or source: Teledyne Vasco.

UNITEMP 19-9DL

Alloy Digest ◽  
1975 ◽  
Vol 24 (11) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
Notch Toughness ◽  
Nickel Iron ◽  
Temperature Performance

Abstract UNITEMP 19-9 DL is a chromium-nickel iron-base austenitic alloy with high strength at least through 1200 F and good notch toughness. It cannot be hardened by heat treatment but bars and forgings are often warm worked to higher strength levels than those obtainable by annealing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-319. Producer or source: Cyclops.

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