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sigma-phase embrittlement

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Journal Articles
Alloy Digest (1980) 29 (7): SS-373.
Published: 01 July 1980
... 1 to 5 on the ASTM scale. RA 800H is free from embrittlement by sigma-phase formation. This alloy is well suited for high-temperature processing in refining or petrochemical service. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well...
Journal Articles
Alloy Digest (1996) 45 (10): SS-655.
Published: 01 October 1996
... Uranus 800 HT is a variant of a high chromium and nickel austenitic alloy that combines good corrosion and creep resistance. The alloy is solution annealed to produce a large grain size and remains stable, not being embrittled by the precipitation of sigma phase. This datasheet provides...
Journal Articles
Alloy Digest (1975) 24 (3): SS-307.
Published: 01 March 1975
..., thus it is not susceptible to embrittlement from sigma phase formation. Type HP was developed for rugged steel-mill furnace-roll service; no comparable wrought alloy exists. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep...
Journal Articles
Alloy Digest (2006) 55 (9): SS-975.
Published: 01 September 2006
.... In aqueous environments the chromium content of 330 provides resistance to oxidizing con- ditions, while the nickel content enhances resistance to reducing conditions. The high nickel content of the alloy also makes it highly resistant to chloride stress-corrosion cracking and sigma phase embrittlement...
Journal Articles
Alloy Digest (2011) 60 (5): SS-1092.
Published: 01 May 2011
... as rapidly as possible to prevent 475 embrittlement and sigma- phase embrittlement. Pickling. A mixture of nitric and hydrofluoric acids is used in pickling. To the extent the NAS 329J3L is more resistant to corrosion than AISI Type 304, descaling is more difficult. Alkaline immersion for a short time before...
Journal Articles
Alloy Digest (1982) 31 (5): SS-407.
Published: 01 May 1982
... of the welded fabrication. Both sigma phase and the effects of 885OF embrittlement can be removed by a one-hour anneal at 1500°F (840°C). rapid cool. Ductility can be restored largely after 885°F embrittlement by heating at 1200°F (650°C) for one hour at temperature and cooling rapidly. Machining: Machine tools...
Journal Articles
Alloy Digest (2010) 59 (8): SS-1072.
Published: 01 August 2010
... ºC (2133 and 1976 ºF). The quenching should be carried out as rapidly as possible to prevent 475 embrittlement and sigma-phase embrittlement. Pickling. A mixture of nitric and hydrofluoric acids is used in pickling. To the extent the NAS 64 is more resistant to corrosion than AISI type 304, descaling...
Journal Articles
Alloy Digest (2023) 72 (10): SS-1363.
Published: 01 October 2023
...: Data on Worldwide Metals and Alloys resistance is needed, then continuous use in the 425 860 °C (795 1580 °F) range is not recommended because of carbide precipitation. However, it often performs well in temperatures fluctuating above and below this range. Atlas 310H is prone to sigma phase...
Journal Articles
Alloy Digest (1989) 38 (8): SS-267.
Published: 01 August 1989
... inlossofroom-temperatureductility.Ductilitycanberestoredby short-timetreatmentat600°C(1 llO F)andrapidaircooling.The alloy is also susceptible to sigma phase embrittlement by long exposure at 550-750°C (1020-1380°F). Weldability of the alloy is good and bending and straightening operations are feasible. Forms...
Journal Articles
Alloy Digest (2010) 59 (7): SS-1070.
Published: 01 July 2010
... and 2. Heat Treatment: Quenching is required after heating to the solution treatment temperature of between 1080 and 1120 ºC (2194 and 2048 ºF). The quenching should be carried out as rapidly as possible to prevent 475 (885) and sigma-phase embrittlement. Pickling. A mixture of nitric and hydrofluoric...
Journal Articles
Alloy Digest (2003) 52 (11): SS-892.
Published: 01 November 2003
... (885 °F) and sigma phase embrittlement. Formability: DuraFoil has good formability in the annealed condition. Formability of cold-rolled DuraFoil is limited to bending. DURAFOILTM Filing Code: SS-892 Stainless Steel November 2003 DURAFOILTM (Ferritic Stainless Steel, Heat-Resistant Alloy) DuraFoil...
Journal Articles
Alloy Digest (1971) 20 (9): SS-259.
Published: 01 September 1971
... breaking whereas Type 446 breaks with this sharp bend. Embrittlement: Annco 18 SR and AISI Type 446 stainless steels were exposed in the annealed condition at 14000F for various times up to 3000 hours. After 3000 hours, neither material shows any sign of sigma phase or embrittlement. Armco 18 SR and Type...
Journal Articles
Alloy Digest (2018) 67 (5): SS-1285.
Published: 01 May 2018
... range should thus be avoided. The effect of 475 embrittlement can be reversed by briefly heating to within the temperature range 700 800 °C (1292 1472 °F). This steel is also susceptible to embrittlement by sigma phase formation within the temperature range 600 800 °C (1112 1472 °F) over long periods...
Journal Articles
Alloy Digest (2018) 67 (4): SS-1284.
Published: 01 April 2018
... or cooling through this temperature range should thus be avoided. The effects of 475 embrittlement (887 °F) can be reversed by briefly heating to within the temperature range 700 800 °C (1292 1472 °F). Due to the high chromium content of this steel, it is susceptible to embrittlement by sigma phase formation...
Journal Articles
Alloy Digest (1969) 18 (2): SS-221.
Published: 01 February 1969
...) may also be present in rhe microstructure. The amounts of the various structural consntuents present depend on the chemical composition and the thermal history of the sample under consideration. Near 1600°F the partially ferridc alloys tend to embrittle from development of the sigma phase. while...
Journal Articles
Alloy Digest (1980) 29 (9): SS-375.
Published: 01 September 1980
...-1400°F (735-760°C), followed by rapid air cool or water quench, depending upon thickness and complexity of the welded fabrication. Both sigma phase and the effects of 885OF embrittlement may be removed by a one-hour anneal at 1500°F (840°C), rapid cool. Ductility may be largely restored after 88S°F...
Journal Articles
Alloy Digest (2018) 67 (7): SS-1291.
Published: 01 July 2018
... resistance. The sigma phase precipitates at between 600 and 1000 °C (1112 and 1832 °F), after a holding time of a few minutes. The alpha precipitation phase at between 350 and 550 °C (662 and 1022 °F) also poses a risk of embrittlement. Product Forms Available Round bars in rolled descaled finish...
Journal Articles
Alloy Digest (2018) 67 (6): SS-1289.
Published: 01 June 2018
... 60% ferrite after annealing between 950 °and 1050 °C (1742 and 1922 °F) followed by a fast cooling. The sensitivity to precipitation of ) intermetallic phases (which cause embrittlement) is much lower than that of Duplex 4462. Typically, phase precipitation requires over 10 hours at 800 °C (1472...
Journal Articles
Alloy Digest (2013) 62 (4): SS-1141.
Published: 01 April 2013
... (1650 2200 ºF). Minimum forge temperature is 900 ºC (1650 ºF) to avoid embrittlement due to interme- tallic phase precipitation. Parts should be rapidly cooled in water (preferred) or air. Parts should be solution annealed after forging to ensure the structure is free of sigma phase. Cold Working...
Journal Articles
Alloy Digest (2010) 59 (3): SS-1056.
Published: 01 March 2010
... formation of the embrittling phase, sigma. Components with heavy cross should be rapidly cooled by water quenching to avoid sigma formation. Alloy 25-6HN products or components exposed to temperatures between 595 and 925 °C (1100 and 1700 °F) during service or hot forming can form sigma phase. The presence...