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Valve steel

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091358
EISBN: 978-1-62708-233-4
... Abstract After about two years in service, a 303 stainless steel valve in contact with a carbonated soft drink in a vending machine occasionally dispensed a discolored drink with a sulfide odor. According to the laboratory at the bottling plant, the soft drink in question was strongly acidic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048117
EISBN: 978-1-62708-235-8
... Abstract Two outer valve springs made from air-melted 6150 pretempered steel wire broke during production engine testing. The springs were 50 mm in OD and 64 mm in free length, had five coils and squared-and-ground ends, and were made of 5.5 mm diam wire. It was revealed that fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046195
EISBN: 978-1-62708-225-9
... Abstract A pilot-valve bushing fractured after only a few hours of service. In operation, the bushing was subjected to torsional stresses with possible slight bending stresses. A slight misalignment occurred in the assembly before fracture. The bushing was made of 8617 steel and was case...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0045992
EISBN: 978-1-62708-225-9
... Abstract After two weeks of operation, a poppet used in a check valve to control fluid flow and with a maximum operating pressure of 24 MPa (3.5 ksi) failed during operation. Specifications required that the part be made of 1213 or 1215 rephosphorized and resulfurized steel. The poppet...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046874
EISBN: 978-1-62708-229-7
... (625 to 750 deg F). Because the spring was enclosed and mounted above the valve, its temperature was probably slightly lower. The 195 mm (7 in.) OD x 305 mm (12 in.) long spring was made from a 35 mm (1 in.) diam rod of H21 hot-work tool steel. It had been in service for about four years and had been...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001352
EISBN: 978-1-62708-215-0
... Abstract Repeated failures of high-pressure ball valves were reported in a chemical plant. The ball valves were made of AFNOR Z30C13 martensitic stainless steel. Initial examination of the valves showed that failure occurred in a weld at the ball/stem junction end of austenitic stainless steel...
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Published: 01 June 2019
Fig. 1 Stainless steel poppet-valve stem that fractured in service. More
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Published: 01 June 2019
Fig. 1 Unetched section through a type 303 stainless steel valve exposed to an acidic soft drink in a vending machine. Micrograph shows localized corrosion along manganese sulfide stringer inclusions at the end-grain surface. 100× More
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Published: 01 June 2019
Fig. 1 Original and improved designs of a 17-7 PH stainless steel valve-seat retainer spring. As originally designed, the inner tabs on the spring broke off as a result of fatigue, and the outer tab exhibited wear. More
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Published: 01 June 2019
Fig. 1 Carbonitrided 8617 steel pilot-valve bushing that fractured in fatigue because of improper heat treatment. Dimensions given in inches More
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Published: 01 June 2019
Fig. 1 Valve springs made from patented and drawn high-carbon steel wire. Distorted outer spring (left) exhibited about 25% set because of proeutectoid ferrite in the microstructure and high operating temperature. Outer spring (right) is satisfactory. More
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Published: 01 June 2019
Fig. 1 H21 tool steel safety-valve spring that fractured from corrosion fatigue in moist air. (a) Photograph of two of the 12 pieces into which the spring shattered. 0.3×. (b) Light fractograph showing typical corrosion-fatigue origin (arrow) and brittle final fracture. 0.7× More
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Published: 01 January 2002
Fig. 37 Fracture surface of a hardened steel valve spring that failed in torsional fatigue. Arrow indicates fracture origin at a subsurface nonmetallic inclusion. More
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Published: 01 January 2002
Fig. 33 Unetched section through a type 303 stainless steel valve exposed to an acidic soft drink in a vending machine. Micrograph shows localized corrosion along manganese sulfide stringer inclusions at the end-grain surface. 100× More
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Published: 01 January 2002
Fig. 6 Valve springs made from patented and drawn high-carbon steel wire. Distorted outer spring (left) exhibited about 25% set because of proeutectoid ferrite in the microstructure and high operating temperature. Outer spring (right) is satisfactory. More
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Published: 01 January 2002
Fig. 22 Original and improved designs of a 17-7 PH stainless steel valve-seat retainer spring. As originally designed, the inner tabs on the spring broke off as a result of fatigue, and the outer tab exhibited wear. More
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Published: 01 January 2002
Fig. 22 Chloride SCC in a type 347 stainless steel shaft in a hydrogen-bypass valve. More
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Published: 01 June 2019
Fig. 1 Fracture surface of a 21-2 steel valve stem. Arrows indicate several crack origins on one side; also visible are fatigue beach marks and the final-fracture zone (bottom). 4.5x More
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Published: 15 January 2021
Fig. 44 Fracture surface of a hardened - steel valve spring that failed in torsional fatigue. Arrow indicates fracture origin at a subsurface nonmetallic inclusion . More
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Published: 15 January 2021
Fig. 33 Unetched section through a type 303 stainless steel valve exposed to an acidic soft drink in a vending machine. Micrograph shows localized corrosion along manganese sulfide stringer inclusions at the end-grain surface. Original magnification: 100× More