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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001545
EISBN: 978-1-62708-236-5
... because of its wide industrial usage for similar bearing applications and because of the alloy's mechanical properties and general corrosion resistance in the intended service environment. It was, however, also recognized that type 440C heat treated to Rc 50–55 can be susceptible to hydrogen stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0045911
EISBN: 978-1-62708-230-3
... and cracks were ultimately caused by the steam. While under normal operation, the steam's purity posed no problem to the material, during boiler cleaning operations, the generating plant had allowed contamination to get into the steam line. Bellows Electric power generation Steam Xray analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
...Abstract Abstract Alloy 430 stainless steel tube-to-header welds failed in a heat recovery steam generator (HRSG) within one year of commissioning. The HRSG was in a combined cycle, gas-fired, combustion turbine electric power plant. Alloy 430, a 17% Cr ferritic stainless steel, was selected...
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
.... Electric power generation Overheating Superheater tubes ASTM A213 grade T22 UNS K21590 Creep fracture/stress rupture Failure occurred in a steel superheater tube in a power plant. The tube was specified as ASTM A 213 grade T 22, and the reported operating conditions were 13 MPa (1900 psi) at 482...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
... increasing stress and initiating fracture. In addition, the composition and hardness of the impeller did not meet specifications. Revision of the casting process and institution of quality assurance methods were recommended. Electric power generation 12% Cr Casting-related failures Fatigue fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
.... Electric power generation Steam generators Tubes Inconel 600 UNS N06600 Intergranular fracture Power plants use steam generators, which have hot reactor coolant water flowing through the generators. One power plant experienced a steam generator tube rupture in the early 1990s. Metallurgical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091330
EISBN: 978-1-62708-234-1
...% CuCl2) at 103 deg C (217 deg F). Such conditions exist at power plants. Recommendations included repairing the C-276 plates with a 686CPT weld alloy, and if that did not correct the situation, replacing the plates with 686 plate (N06686) welded with 686 CPT. Chlorides Electric power generation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001709
EISBN: 978-1-62708-229-7
... at 693 deg F (367 deg C) and 2935 psi (20.5 MPa), failed near the IK boxes as a result of thermal fatigue. Thermal fatigue damage was accelerated by repetitive exposure to water droplets from the soot blower and the associated rapid cooling. Boilers Electric power generation Tubes ASME SA210-A1...
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
... Electric power generation Steam lines Welded joints ASME SA335-P22 Intergranular fracture Creep fracture/stress rupture A main steam pipe was found to be leaking during a start-up after a 1-day shutdown. The leak was a large circumferential crack in a pipe-to-fitting weld in one of two steam...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001079
EISBN: 978-1-62708-214-3
... overboring of the rotor to remove indications close to the surface and revision of starting procedures, were implemented to extend the remaining life of the rotor and ensure its fitness for continued service. Cleavage Electric power generation Forgings Nonmetallic inclusions Cr-Mo-V Metalworking...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048850
EISBN: 978-1-62708-229-7
..., with associated creep relaxation. Boilers Electric power generation Steam lines Thermal stresses 316 UNS S31600 Thermal fatigue fracture Visual inspection of a type 316 stainless steel main steam line of a major utility boiler system revealed cracks on its outer surface near a hanger lug...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048708
EISBN: 978-1-62708-229-7
... less likely was suggested. Electric power generation Heat exchangers Hydraulic oil coolers Tubes C70600 UNS C70600 Crevice corrosion Leakage from the horizontal heat-exchanger tubes in one of two hydraulic-oil coolers in an electric-power plant occurred after 18 months of service...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
... to decrease the temperature fluctuations of the inner surface. Electric power generation Fatigue failure Steam turbines Turbogenerators 321 UNS S32100 Thermal fatigue fracture Background Testing Procedure and Results Discussion Conclusion and Recommendations Selected References...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001711
EISBN: 978-1-62708-229-7
..., as a function of oxidation thickness, temperature and time, confirming the creep failure diagnostic. Boiler pipes Electric power generation Steam 10CrMo9-10 X20MoV12-1 Creep fracture/stress rupture Introduction Creep Failure in 10CrMo9-10 Steel Pipes Diagnostic Factors: Oxide Thickness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001686
EISBN: 978-1-62708-220-4
... of failure was low flow transient operation. Coils (windings) Electric power generation Vaporizers ASME SA106 B Transgranular fracture Thermal fatigue fracture Introduction Results and Discussion Conclusions Acknowledgments References References 1. Dimmer J. P...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... in low toughness. It was recommended that fully killed carbon steel with a fine-grain microstructure be used. Redesign of the flap to remove the step in the forging that acted as a notch was also recommended. Electric power generation Forgings Marine environments Weldments Fe-0.10C Fe-0.19C...
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
... Specification SA-335, 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091640
EISBN: 978-1-62708-229-7
... cool. Electric power generation Sensitization Steam Valve stem 17-4 PH UNS S17400 Stress-corrosion cracking Heat treating-related failures A 9 cm (3.5 in.) diameter valve stem made of 17-4 PH (AISI type 630) stainless steel, which was used for operating a 61 cm (24 in.) gate valve...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001661
EISBN: 978-1-62708-229-7
... of the cracks. The NDT inspections, evaluations, method of field metallography, analysis and conclusions are discussed with recommendations for corrective actions in the following report. Cracking (fracturing) Electric power generation Field metallography Plates (structural members) Welded joints...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
... by scanning electron microscopy and X-ray imaging of fracture surfaces revealed pockets of inclusions at the crack origins. In addition, tests were conducted to evaluate the detrimental effects of internal hydrogen on ductility and crack initiation in this alloy. Coils (windings) Electric power...