Creep rupture properties of 18 Pct Cr-8 Pct Ni-Ti-Nb and Type 347H austenitic stainless steels

1985 ◽  
Vol 7 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Y. Minami ◽  
H. Kimura ◽  
M. Tanimura
Keyword(s):  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Creep Rupture ◽  
Rupture Properties

Developing New Cast Austenitic Stainless Steels With Improved High-Temperature Creep Resistance

2009 ◽  
Vol 131 (5) ◽  
Author(s):  
Philip J. Maziasz ◽  
John P. Shingledecker ◽  
Neal D. Evans ◽  
Michael J. Pollard
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Creep Strength ◽  
Stainless Steels ◽  
Creep Resistance ◽  
Austenitic Stainless Steels ◽  
Creep Rupture ◽  
Particulate Filter ◽  
Alloy Development ◽  
Wide Range

Oak Ridge National Laboratory and Caterpillar (CAT) have recently developed a new cast austenitic stainless steel, CF8C-Plus, for a wide range of high-temperature applications, including diesel exhaust components and turbine casings. The creep-rupture life of the new CF8C-Plus is over ten times greater than that of the standard cast CF8C stainless steel, and the creep-rupture strength is about 50–70% greater. Another variant, CF8C-Plus Cu/W, has been developed with even more creep strength at 750–850°C. The creep strength of these new cast austenitic stainless steels is close to that of wrought Ni-based superalloys such as 617. CF8C-Plus steel was developed in about 1.5 years using an “engineered microstructure” alloy development approach, which produces creep resistance based on the formation of stable nanocarbides (NbC), and resistance to the formation of deleterious intermetallics (sigma, Laves) during aging or service. The first commercial trial heats (227.5 kg or 500 lb) of CF8C-Plus steel were produced in 2002, and to date, over 27,215 kg (300 tons) have been produced, including various commercial component trials, but mainly for the commercial production of the Caterpillar regeneration system (CRS). The CRS application is a burner housing for the on-highway heavy-duty diesel engines that begins the process to burn-off particulates trapped in the ceramic diesel particulate filter (DPF). The CRS/DPF technology was required to meet the new more stringent emissions regulations in January, 2007, and subjects the CRS to frequent and severe thermal cycling. To date, all CF8C-Plus steel CRS units have performed successfully. The status of testing for other commercial applications of CF8C-Plus steel is also summarized.

scholarly journals Studies on Creep Rupture Strength and Changes of Microstructure of Austenitic Stainless Steels

1960 ◽  
Vol 24 (12) ◽  
pp. 818-822 ◽  
Author(s):  
Gunji Shinoda ◽  
Tadao Sano ◽  
Tadakazu Sakurai ◽  
Tadashi Kawasaki ◽  
Hisashi Izumi
Keyword(s):  
Stainless Steels ◽  
Rupture Strength ◽  
Austenitic Stainless Steels ◽  
Creep Rupture ◽  
Creep Rupture Strength
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