GB889243A - Improvements in or relating to austenitic alloys - Google Patents

Improvements in or relating to austenitic alloys

Info

Publication number
GB889243A
GB889243A GB6352/59A GB635259A GB889243A GB 889243 A GB889243 A GB 889243A GB 6352/59 A GB6352/59 A GB 6352/59A GB 635259 A GB635259 A GB 635259A GB 889243 A GB889243 A GB 889243A
Authority
GB
United Kingdom
Prior art keywords
range
hours
alloy
service
followed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB6352/59A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allegheny Ludlum Steel Corp
Original Assignee
Allegheny Ludlum Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allegheny Ludlum Steel Corp filed Critical Allegheny Ludlum Steel Corp
Publication of GB889243A publication Critical patent/GB889243A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

An alloy for service at elevated temperatures contains:- .C.\sO 0,15% .Si.\sO 1,5% .Mn.\sO 1,5% .Cr.10-20% .Al.0,5-4% Al+Ti lying within the range 2,5-7% .Ti.1,0-4,5% Al+Ti lying within the range 2,5-7% .Mo.1-8% .W.2-15% .V.\sO 1,5% .B.0,006-0,06% .Ni.30-55% .Fe.22-45% .Impurities (e.g. N2, P, S, Co, Cu).\sO 1,5% It is solution treated for 1/2 to 2 hours in the range 1750-2150 DEG F. and quenched in water, oil or air. For service at temperatures of about 1200 DEG F. the alloy is then given a double precipitation treatment consisting of 1/2 to 24 hours in the range 1450-1650 DEG F. followed by air cooling and then 1/2 to 24 hours in the range 1200-1400 DEG F., again followed by air cooling. For service at temperatures around 1500 DEG F., optimum stress rupture properties are developed by a single stage precipitation treatment of 1/2 to 24 hours in the range 1250-1450 DEG F. followed by air cooling. Use of the alloy for turbine parts is referred to.
GB6352/59A 1958-02-24 1959-02-24 Improvements in or relating to austenitic alloys Expired GB889243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US889243XA 1958-02-24 1958-02-24

Publications (1)

Publication Number Publication Date
GB889243A true GB889243A (en) 1962-02-14

Family

ID=22214304

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6352/59A Expired GB889243A (en) 1958-02-24 1959-02-24 Improvements in or relating to austenitic alloys

Country Status (1)

Country Link
GB (1) GB889243A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040901A1 (en) * 1980-05-28 1981-12-02 Westinghouse Electric Corporation Alloys
EP0136998A1 (en) * 1983-08-10 1985-04-10 Voest-Alpine Stahl Aktiengesellschaft Wrought nickel-base alloy and process for its thermal treatment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040901A1 (en) * 1980-05-28 1981-12-02 Westinghouse Electric Corporation Alloys
EP0136998A1 (en) * 1983-08-10 1985-04-10 Voest-Alpine Stahl Aktiengesellschaft Wrought nickel-base alloy and process for its thermal treatment

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