Tensile Properties of Boiler Materials for FAD Based Failure Analysis

Author(s):  
Fred V. Ellis

Failure assessment of components with crack-like flaws are performed using the Failure Assessment Diagram (FAD) approach. Both fracture toughness and tensile properties of the component material are required for the analysis. The temperature dependence for the tensile properties of yield strength, flow stress, and ratio of yield strength to ultimate tensile strength were studied. The yield/tensile ratio is used to estimate the strain hardening exponent. The materials include carbon steel, 1/2Cr to 9Cr-1Mo steels, 1CrMoV rotor material, and 422 stainless steel bolting material. The tensile data was from the NRIM data compilation. Least squares regression was performed for log of the tensile property as the dependent variable and a sixth order Chebyshev polynomials in temperature. In general, the fits were good based on comparisons of the observed and calculated, specifically the mean at each temperature, the standard deviation, and the R2 value. The distribution function was shown to be normal. Values for the regression coefficients and standard deviation in log Y are tabulated.

Alloy Digest ◽  
2011 ◽  
Vol 60 (10) ◽  

Abstract Dogal 300 LAD, 340 LAD, 380 LAD, 420 LAD, 460 LAD and 500 LAD are high-strength low alloyed steels intended for pressing. The designation in the name is the guaranteed minimum yield strength. Dogal steels can be zinc coated. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on surface qualities as well as forming, heat treating, joining, and surface treatment. Filing Code: CS-167. Producer or source: SSAB Swedish Steel Inc..


Alloy Digest ◽  
2016 ◽  
Vol 65 (4) ◽  

Abstract Vallourec VM 85 13Cr (minimum yield strength 85 ksi, or 586 MPa) is a low alloy carbon steel for use in oil country tubular goods as a material suitable for sour service. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming. Filing Code: CS-198. Producer or source: Vallourec USA Corporation.


Alloy Digest ◽  
2016 ◽  
Vol 65 (3) ◽  

Abstract Vallourec VM 90 13CR (minimum yield strength 90 ksi, or 620 MPa) is a low alloy carbon steel for use in oil country tubular goods as a material suitable for sour service. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming. Filing Code: CS-197. Producer or source: Vallourec USA Corporation.


Alloy Digest ◽  
2015 ◽  
Vol 64 (3) ◽  

Abstract Dogal H 700 LAD is a galvanized hot rolled steel that is microalloyed and can be cold formed. The 700 signifies the minimum yield strength. This datasheet provides information on composition, physical properties, tensile properties. and bend strength. It also includes information on forming. Filing Code: CS-184. Producer or source: SSAB Swedish Steel Inc..


Alloy Digest ◽  
2016 ◽  
Vol 65 (11) ◽  

Abstract Strenx 960MC is a hot-rolled structural steel made for cold forming, with minimum yield strength of 960 MPa (139 ksi) for stronger and lighter structures. This alloy meets or exceeds the requirements of S960MC in EN 10149-2. This datasheet provides information on composition, physical properties, tensile properties, and bend strength. It also includes information on surface qualities as well as forming, machining, and joining. Filing Code: SA-772. Producer or source: SSAB Swedish Steel Inc..


Alloy Digest ◽  
2016 ◽  
Vol 65 (11) ◽  

Abstract N-A-XTRA M800 is a quenched and tempered structural steel produced as heavy plates. N-A-XTRA steel can be supplied in six different grades with a minimum yield strength of 550, 620, 700 and 800 MPa (79.8, 89.9, 101.5 and 116.0 ksi). Some grades are delivered with different toughness properties. This last quality is for low service temperature with minimum impact energy at -40 deg C (-40 deg F) for grade N-A-XTRA M in a thickness range from 3 to 120 mm (0.118 to 4.724 in.). This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-771. Producer or source: ThyssenKrupp Steel Europe AG.


Alloy Digest ◽  
2012 ◽  
Vol 61 (2) ◽  

Abstract RUUKKI RAEX 300 (typical yield strength 900 MPa) is part of the Raex family of high-strength and wear-resistant steels with favorable hardness and impact toughness to extend life and decrease wear in structural components. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: SA-643. Producer or source: Rautaruukki Corporation.


Alloy Digest ◽  
2011 ◽  
Vol 60 (11) ◽  

Abstract Supralsim 690 is high yield strength steel for welded and weight-saving structures. This datasheet provides information on composition, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming and joining. Filing Code: SA-637. Producer or source: Industeel USA, LLC.


Alloy Digest ◽  
2017 ◽  
Vol 66 (5) ◽  

Abstract XABO 890 (minimum yield strength of 890 MPa, or 129 ksi, for thicknesses up to 50 mm, or 2.0 in.) is a quenched and tempered structural steel used for heavy plate products in thicknesses up to 100 mm (3.9 in.) This datasheet provides information on composition, microstructureand tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-784. Producer or source: ThyssenKrupp Steel Europe AG.


Alloy Digest ◽  
2017 ◽  
Vol 66 (2) ◽  

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