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Admiralty brass

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091807
EISBN: 978-1-62708-229-7
... Abstract Failures occurred in admiralty brass condenser tubes in a nuclear plant cooled by freshwater. About 2500 tubes had to be replaced over a span of six years. Investigation (visual inspection, chemical analysis, water chemistry (for both intake and outfall), and corrosion products...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001651
EISBN: 978-1-62708-229-7
... Abstract Some of the admiralty brass tubes were failing in a heat exchanger. The heat exchanger cooled air by passing river water through the inside of the tubes. The wall thickness of all tubes ranged between 1.19 to 1.27 mm (0.047 to 0.050 in.). General intergranular corrosion occurred...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001310
EISBN: 978-1-62708-215-0
... Abstract Leaks developed in 22 admiralty brass condenser tubes. The tubes were part of a condenser that was being used to condense steam from a nuclear power plant and had been in operation for less than 2 years. Analysis identified three types of failure modes: stress-corrosion cracking...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001044
EISBN: 978-1-62708-214-3
... Abstract Inhibited admiralty brass (UNS C44300) condenser tubes used in a natural-gas-fired cogeneration plant failed during testing. Two samples, one from a leaking tube and the other from an on leaking tube, were examined. Chemical analyses were conducted on the tubes and corrosion deposits...
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Published: 01 January 2002
Fig. 10 Failed admiralty brass heat-exchanger tubes from a refinery reformer unit. The tubes failed by corrosion fatigue. (a) Circumferential cracks on the tension (outer) surface of the U-bends. Approximately 1 1 4 ×. (b) Blunt transgranular cracking from the water side of tube 1. 40× More
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Published: 01 June 2019
Fig. 1 Failed admiralty brass heat-exchanger tubes from a refinery reformer unit. The tubes failed by corrosion fatigue. (a) Circumferential cracks on the tension (outer) surface of the U-bends. Approximately 1 1 4 ×. (b) Blunt transgranular cracking from the water side of tube 1. 40× More
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Published: 01 June 2019
Fig. 2 Intergranular cracks in failed admiralty brass heat exchanger tubes (unetched, 50×). More
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Published: 01 June 2019
Fig. 1 Schematic diagram of a turbogenerator oil cooler with Admiralty brass tubes. More
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Published: 15 January 2021
Fig. 38 Intergranular attack of admiralty brass in hot water containing a small amount of sulfuric acid. Original magnification: 150× More
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Published: 30 August 2021
Fig. 10 Failed admiralty brass heat-exchanger tubes from a refinery reformer unit. The tubes failed by corrosion fatigue. (a) Circumferential cracks on the tension (outer) surface of the U-bends. Original magnification: ~1.25×. (b) Blunt transgranular cracking from the water side of tube 1 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0048728
EISBN: 978-1-62708-228-0
... Abstract After being in service for ten years, two admiralty brass heat-exchanger tubes from a cooler in a refinery catalytic reforming unit cracked circumferentially in the area of U-bends. A blunt transgranular cracking with minimal branching propagating from the inside surface of the tube...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001521
EISBN: 978-1-62708-229-7
... Abstract Admiralty brass (Alloy C44300) cooling tubes which were part of a heat exchanger in a turbogenerator that provided electricity to a manufacturing plant failed. A mixture of non-recirculating city and “spring pit” water flowed through bundles of tubes to cool the oil in which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091703
EISBN: 978-1-62708-229-7
... Abstract An arsenical admiralty brass (UNS C44300) finned tube in a generator air cooler unit at a hydroelectric power station failed. The unit had been in operation for approximately 49,000 h. The cooling medium for the tubes was water from a river. Air flowed over the finned exterior...
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Published: 01 January 2002
Fig. 38 Intergranular attack of Admiralty B brass in a hot water containing a small amount of sulfuric acid. 150× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091378
EISBN: 978-1-62708-219-8
... exfoliated from the base material and cracked. Recommendations included replacing the piping with a more corrosion-resistant material such as red brass (UNS C23000), inhibited Admiralty brass (UNS C44300), or arsenical aluminum brass (UNS C68700). Dezincification Fresh water Perforation Piping...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001313
EISBN: 978-1-62708-215-0
... Abstract An arsenical admiralty brass (UNS C44300) finned tube in a generator air cooler unit at a hydroelectric power station failed. The unit had been in operation for approximately 49,000 h. Stereomicroscopic examination revealed two small transverse cracks that were within a few millimeters...
Image
Published: 01 June 2019
Fig. 1 Straight branched transgranular and intergranular cracks in failed admiralty brass heat exchanger tubes (unetched, 50×). More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046469
EISBN: 978-1-62708-229-7
... susceptible to dezincification. Recommendations included replacing the material with copper alloy C68700 (arsenical aluminum brass), which contains 0.02 to 0.06% As and is highly resistant to dezincification. Copper alloy C44300 (inhibited admiralty metal) could be an alternative selection...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... be satisfactorily extruded. Corrosion Resistance To meet corrosion requirements, tubing must be resistant to general corrosion, stress-corrosion cracking (SCC), selective leaching (for example, dezincification of brass), and oxygen-cell attack in whatever environments are encountered before service...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
... with hydrostatic testing and drying and take steps to ensure that the test water is free of corrosives and the tubes are dry before boxing. Some copper alloys, such as the brasses, are very sensitive to stagnant water conditions, especially if the water contains biological material or chemicals that can...