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2.25Cr-1Mo

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048303
EISBN: 978-1-62708-236-5
... increased the actual operating stress. Tube wastage and high operating temperatures hastened the failure. A better understanding of the material condition of this superheater was recommended to verify all the suspect hot tubes. Overheating 2.25Cr-1Mo Creep fracture/stress rupture This example...
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Published: 01 June 2019
Fig. 1 2.25Cr-1Mo steel superheater tube that ruptured because of thinning by coal-ash corrosion. More
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Published: 01 June 2019
Fig. 1 Metallographic cross section through failure in 2.25Cr-1Mo weld main steam line of power plant. Secondary cracking in base metal indicates that failure is not uniquely the result of weld-metal properties. More
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Published: 01 June 2019
Fig. 1 2.25Cr-1Mo steel superheater tube that failed by creep. (a) As-received failure. (b) Microstructure of the whole tube section is spheroidized carbides in ferrite. Etched with nital. 500× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048331
EISBN: 978-1-62708-229-7
... Abstract The top tube of a horizontal superheater bank in the reheat furnace of a steam generator ruptured after seven years in service. The rupture was found to have occurred in the ferritic steel tubing (2.25Cr-1Mo steel (ASME SA-213, grade T-22)) near the joint where it was welded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001011
EISBN: 978-1-62708-229-7
... Abstract After some 87,000 h of operation, failure took place in the bend of a steam pipe connecting a coil of the third superheater of a steam generator to the outlet steam collector. The unit operated at 538 deg C and 135 kPa, producing 400 t/h of steam. The 2.25Cr-1Mo steel pipe in which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001526
EISBN: 978-1-62708-229-7
..., and the steel was Grade P22, a 2.25Cr-1Mo alloy steel. Visual and metallurgical evaluations showed the cracking in the west superheater outlet header was caused by thermal fatigue. Tube holes had served as a preferential site for thermal fatigue cracking. Electric power generation Overheating Piping...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001128
EISBN: 978-1-62708-214-3
... was approximately 280 mm (11 in.) wide, 356 mm (14 in.) long, and 38 mm (1.5 in.) thick. A cross-sectional view is shown in Fig. 1 . The steam pipe was made from an ASTM A-155-66 class 1 (2.25Cr-1Mo) steel. The typical operation temperature was approximately 540 °C (1000 °F). Creep crack growth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048846
EISBN: 978-1-62708-234-1
... leads between the superheater outlet nozzles and the turbine stop valves, a line made of SA335-P22 material (2.25Cr-1Mo steel) with an outside diameter of 475 mm (18.75 in.) and a wall thickness of 95 mm (3.75 in.). The design operating conditions were 25 MPa (3.6 ksi) at 540 °C (1000 °F...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091028
EISBN: 978-1-62708-229-7
... damage was throughout the entire wall thickness. 2% nital etch. 297× Chemical analysis confirmed that the tube satisfied the specified compositional requirements, that is, a 2.25Cr-1Mo alloy steel. The strength determined on a sample remote from the fracture was higher than required...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001001
EISBN: 978-1-62708-229-7
... by corrosion deposits at their tips. The failure suggests control of dissolved solids in the boiler feedwater may have been inadequate. Boilers Corrosion products Superheater headers 2.25Cr-1Mo Thermal fatigue fracture Corrosion fatigue Examination of the header of the third superheater...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048845
EISBN: 978-1-62708-229-7
..., ranging from small radial cracks to full 360° cracks. An example of this cracking is shown in Fig. 2 . The unit was operated under reduced-temperature conditions and with less load cycling than previously until a redesigned SA335-P22 (2.25Cr-1Mo-0.25-Si) header was installed. Fig. 1 Interligament...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... joints 2.25Cr-1Mo Creep fracture/stress rupture Introduction Following the discovery by plant personnel of a leak in the elevated temperature superheater (SH) outlet header at Shawville's Unit No. 3, a failure analysis was conducted to evaluate the degree of damage to the header...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... studies, in which practical systems are analyzed from a fracture mechanics perspective are also presented in Ref 11 . Casings for a ship service turbine generator (SSTG) are cast from 2.25Cr-1Mo steel and are designed to provide service for 30 years. The regions of the casings in the vicinity...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... from 2.25Cr-1Mo steel and are designed to provide service for 30 years. The regions of the casings in the vicinity of the steam chest and the steam passageways are subjected to high transient thermal stresses during startup and to moderate steady-state mechanical stresses during sustained operation...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001330
EISBN: 978-1-62708-215-0
.... The entire superheater should be upgraded to ASTM A213 Grade T22 tubing. Boiler tubes Creep rupture Mechanical properties Overheating UNS K21590 UNS K01201 2.25Cr-1Mo ASTM A213 grade T22 ASTM A192 Creep fracture/stress rupture Handbook of Case Histories in Failure Analysis, Volume 2...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
... design concepts, it was recommended that the Incoloy 800Hor H1 pigtails be changed to a low-alloy steel, such as 2.25Cr-1Mo, protected by refractory lining and waterjackets. Metallographic examination ( Fig. 3 , 4 , 5 ) indicated that the curved parts had suffered more severe deterioration than...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001834
EISBN: 978-1-62708-241-9
... ( 2002 ) 10.1016/S0010-938X(01)00058-0 17. Jonsson T. , Folkeson N. , Svensson J.-E. , Johansson L.-G. , Halvarsson M. , An ESEM in situ investigation of initial stages of the KCl induced high temperature corrosion of a Fe-2.25Cr-1Mo steel at 400 °C . Corros. Sci . 53...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
... as necessary on an annual basis. Example 4: Creep Failure of a 2.25Cr-1Mo Steel Superheater Tube This example concerns a creep failure taken from a radiant superheater. There have been no reported creep failures in nearly 17 years of service. The boiler is coal fired. Operating drum pressure is 18 MPa...