US3649258A - Nickel alloy - Google Patents

Nickel alloy Download PDF

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Publication number
US3649258A
US3649258A US15703A US3649258DA US3649258A US 3649258 A US3649258 A US 3649258A US 15703 A US15703 A US 15703A US 3649258D A US3649258D A US 3649258DA US 3649258 A US3649258 A US 3649258A
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United States
Prior art keywords
percent
nickel
chromium
alloy
copper
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Expired - Lifetime
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US15703A
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English (en)
Inventor
Robert C Zukas
Robert C Mcmath
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 Corp
Pittsburgh National Bank
Original Assignee
Allegheny Ludlum Steel Corp
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Application filed by Allegheny Ludlum Steel Corp filed Critical Allegheny Ludlum Steel Corp
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Publication of US3649258A publication Critical patent/US3649258A/en
Assigned to ALLEGHENY LUDLUM CORPORATION reassignment ALLEGHENY LUDLUM CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 8-4-86 Assignors: ALLEGHENY LUDLUM STEEL CORPORATION
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLEGHENY LUDLUM CORPORATION
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK ASSIGNMENT OF ASSIGNORS INTEREST. RECORDED ON REEL 4855 FRAME 0400 Assignors: PITTSBURGH NATIONAL BANK
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Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • alloys that contain nickel, chromium, copper, and iron can be formulated with substantially improved electrical properties by carefully balancing the nickel and chromium contents with respect to each other and by maintaining sulfur below a critical limit of 0.003 percent. More specifically, alloys in accordance with the invention contain about 75 to 80 percent nickel, about 1.75 to 3.5 percent chromium, about 3 to 7 percent copper, less than 0.003 percent sulfur, preferably not greater than 0.002 percent sulfur, and the balance iron. In addition, however, the nickel and chromium contents are carefully restricted with respect to each other.
  • the first three heats in Table I have balanced nickel and chromium contents but the sulfur is 0.003 percent or greater.
  • 0.003 percent sulfur in heat 8824 is too high and the permeability is substantially less then alloys with less than 0.003 percent sulfur, as shown in Table 11.
  • Heat 81990 in Table 1 has desirably low sulfur, i.e., 0.002 percent, but the nickel and chromium contents are not properly balanced and, accordingly, the permeability is low.
  • each nickel level between about 75 and percent, there exists a chromium level which is capable of developing unusually high magnetic properties.
  • the nickel level is outside the specified range, the magnetic properties cannot be developed within the desired cooling rates of per hour to 1,000 F. per hour. 1n the curve of the accompanying drawing, the nickel and chromium contents are plotted against each other so that combinations of nickel and chromium can be selected which will result in alloys having superior magnetic properties.
  • a number of alloys having desirable properties are listed in Table 111. The nickel and chromium contents are related to each other in the manner illustrated in the curve.
  • lines A and B define the zone within which the properly balanced nickel and chromium compositions appear.
  • Line C represents the optimum balancing of these elements, however the area between lines A" and B will provide related nickel and chromium content with superior properties.
  • the copper content within the range of 3 to 7 percent does not affect the properties as much as nickel and chromium.
  • the nickel content can extend from about 76.2 (line d f to about 77.6 percent (point e).
  • the copper content should be between about 4.8 percent (line d e) to 6.2 percent (point f).
  • the copper content should be between 4.8 percent (line d e) and 3.3 percent (point 3).
  • Preferred nickel and copper contents for 2.8 percent chromium (point h) would be about 76.9 percent nickel (line m n) and about 4.0 percent copper (point m) to about 5.5 percent copper (point n).
  • Alloys of the invention may additionally contain certain other elements which do not unduly interfere with the desirably high magnetic properties.
  • these elements are manganese, silicon and carbon. As much as 1.5 percent manganese has been found to be includable without detrimentally affecting the magnetic properties.
  • silicon may be included up to 1.0 percent and carbon up to 0.05 percent.
  • impurities should be maintained as low as possible. This may be advantageously done by vacuum melting the alloy which greatly minimizes the risk of contamination. Other melting techniques such as consumable electrode remelting or electroslag remelting may also be employed with advantage due to the ability to control impurity levels by these melting practices.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US15703A 1970-03-02 1970-03-02 Nickel alloy Expired - Lifetime US3649258A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1570370A 1970-03-02 1970-03-02

Publications (1)

Publication Number Publication Date
US3649258A true US3649258A (en) 1972-03-14

Family

ID=21773038

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US15703A Expired - Lifetime US3649258A (en) 1970-03-02 1970-03-02 Nickel alloy

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US (1) US3649258A (cg-RX-API-DMAC10.html)
CA (1) CA945786A (cg-RX-API-DMAC10.html)
DE (1) DE2109851A1 (cg-RX-API-DMAC10.html)
FR (1) FR2081632B1 (cg-RX-API-DMAC10.html)
GB (1) GB1322629A (cg-RX-API-DMAC10.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004080A (en) * 1975-07-25 1977-01-18 Rca Corporation Metal coating for video discs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737043B1 (fr) * 1995-07-18 1997-08-14 Imphy Sa Alliage fer-nickel pour masque d'ombre tendu

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553035A (en) * 1968-08-05 1971-01-05 Westinghouse Electric Corp Process for making high initial permeability iron-nickel alloys

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB266066A (en) * 1925-11-20 1927-02-21 Willoughby Statham Smith New and improved magnetic alloys and their application in the manufacture of telegraphic and telephonic cables
DE1222271B (de) * 1960-05-27 1966-08-04 Vacuumschmelze Ag Verfahren zur Erzeugung hochpermeabler Nickel-Eisen-Legierungen mit einer rechteckfoermigen Hysteresisschleife

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553035A (en) * 1968-08-05 1971-01-05 Westinghouse Electric Corp Process for making high initial permeability iron-nickel alloys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004080A (en) * 1975-07-25 1977-01-18 Rca Corporation Metal coating for video discs

Also Published As

Publication number Publication date
GB1322629A (en) 1973-07-11
FR2081632A1 (cg-RX-API-DMAC10.html) 1971-12-10
CA945786A (en) 1974-04-23
DE2109851A1 (de) 1971-09-16
FR2081632B1 (cg-RX-API-DMAC10.html) 1975-06-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ALLEGHENY LUDLUM CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:ALLEGHENY LUDLUM STEEL CORPORATION;REEL/FRAME:004779/0642

Effective date: 19860805

AS Assignment

Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:ALLEGHENY LUDLUM CORPORATION;REEL/FRAME:004855/0400

Effective date: 19861226

AS Assignment

Owner name: PITTSBURGH NATIONAL BANK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. RECORDED ON REEL 4855 FRAME 0400;ASSIGNOR:PITTSBURGH NATIONAL BANK;REEL/FRAME:005018/0050

Effective date: 19881129