2C4 Effects of Alloying Elements and Constituent Phases on Creep Rupture Strength of 12% Cr Steels

2013 ◽  
Vol 2013 (0) ◽  
pp. 81-82
Author(s):  
Tatsuya TOKUNAGA ◽  
Kenji TERATA ◽  
Shin-ichi KOMAZAKI
Keyword(s):  
Rupture Strength ◽  
Creep Rupture ◽  
Alloying Elements ◽  
Creep Rupture Strength ◽  
Cr Steels

Assessment of Creep Rupture Strength for New Martensitic 9% Cr Steels

2007 ◽  
Author(s):  
Walter Bendick ◽  
Jean Gabrel ◽  
Bruno Vandenberghe
Keyword(s):  
Power Plants ◽  
Rupture Strength ◽  
Strength Properties ◽  
Creep Rupture ◽  
Assessment Procedure ◽  
Creep Rupture Strength ◽  
Raw Data ◽  
Cr Steels ◽  
Term Creep

The application of new heat resistant steels in power plants requires reliable long term creep rupture strength values as basis for design. Modern martensitic 9% Cr-steels have complex microstructures that change with service exposure. That is why extrapolations of long term strength properties will be most difficult. Due to new long term test results, re-assessments became necessary for grades 911 and 92. Different methods have been used. Good agreement was obtained between a graphical and the numerical ISO 6303 method. In both cases a two-step assessment procedure was used. First the raw data was prepared in a suitable way, which was followed by mathematical averaging procedures. For comparison a Larson-Miller analysis on the raw data was performed, too. The results turned out to be too optimistic at temperatures higher than 575°C (1050°F). It is shown that a suitable preparation of data can improve the Larson-Miller assessment. As a result of the new assessments the design values had to be reduced for both grades. With respect to previous assessments the new values are up to almost 10% lower. In the case of grade 92 the difference from the former ASME values are even higher. Consequences concerning design and service operation are discussed.

Effect of Alloying Elements on Creep Rupture Strength of 25Cr-20Ni Casting Steel

1978 ◽  
Vol 64 (3) ◽  
pp. 478-484 ◽  
Author(s):  
Yutaka FUKUI ◽  
Ryoichi SASAKI ◽  
Fumio HATAYA ◽  
Shintaro TAKAHASI
Keyword(s):  
Rupture Strength ◽  
Creep Rupture ◽  
Alloying Elements ◽  
Creep Rupture Strength ◽  
Casting Steel ◽  
Effect Of Alloying

scholarly journals Effect of Carbon, Nitrogen and Nickel on Long-term Creep Rupture Strength of 10 Cr Steels Containing Boron

2011 ◽  
Vol 97 (5) ◽  
pp. 295-304
Author(s):  
Masahiko Arai ◽  
Kentaro Asakura ◽  
Hiroyuki Doi ◽  
Hirotsugu Kawanaka ◽  
Toshihiko Koseki ◽  
...  
Keyword(s):  
Rupture Strength ◽  
Creep Rupture ◽  
Creep Rupture Strength ◽  
Cr Steels ◽  
Term Creep

scholarly journals Effect of Alloying Elements on Creep Rupture Strength of NA22H at 1200°C.

1964 ◽  
Vol 50 (8) ◽  
pp. 1210-1216
Author(s):  
Shigehiro INOUE ◽  
Takashi TSUCHIYA ◽  
Yosuke MATSUMOTO
Keyword(s):  
Rupture Strength ◽  
Creep Rupture ◽  
Alloying Elements ◽  
Creep Rupture Strength ◽  
Effect Of Alloying

KUBOTA ALLOY KHR35C

Alloy Digest ◽  
1999 ◽  
Vol 48 (7) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Rupture Strength ◽  
Creep Rupture ◽  
Creep Rupture Strength ◽  
Temperature Performance

Abstract Kubota alloy KHR35C is similar to HP alloy with the addition of niobium to increase its creep-rupture strength. Typical applications include components and assemblies for severe carburizing environments, such as ethylene pyrolysis coils. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as casting and joining. Filing Code: SS-753. Producer or source: Kubota Metal Corporation.

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