US1403558A - Metallic alloy - Google Patents

Description

UNITED STATES RATENT OFFICE.

AMBROSE J. MANIDELL, OF MORRISTOWN, NEW JERSEY, ASSIGNOR TO ELECTRICAL ALLOY COMPANY, OF MORRISTOWN, NEW JERSEY, A CORPORATION O I NEW Patented Jan. 17, 1922.

JERSEY.

METALLIC ALLOY.

1 403 558 Specification of Letters Patent.

No Drawing.

To all whom it may concern:

Be it known that I, AMBROSE J. MANDELL, a citizen of the United States, residing at Morristown, in the county of Morris and State of New Jersey, have invented certain new and useful Improvements in Metallic Alloys, of which the following is a specification.

This invention relates .to an improved metal alloy, and has for its primary object Nickel 404557;, Copper 2030% Iron 02-15% Manganese 02-25% Metal alloy having the metallic ingredients in the relative proportions specified has higher electrical resistant properties than what is known as Monel metal, upon which my invention is an improvement. I have found that the electrical resistance of Monel metal is very little affected by rela tively great changes in the proportions of nickel and copper present in the alloy, but is very greatly affected by smallvariations 1n the percentages of iron, manganese and similar metals, which are usually present in quantities not exceeding 2%.

Therefore, by increasing the iron or manganese content or both in suitable proportions, Ihave found that the electrical resistance of the resultant alloy may be greatly increased. Either iron or manganese may be added alone, or commercial ferromanganese of suitable percentages may be added, depending on the properties desired in the resulting alloy.

The addition of iron greatly increases the electrical resistance of the resultant alloy,

Application filed January 29, 1920. Serial No. 354,889.

alloy but does not greatly change the resistance to corrosion. Therefore, very much more manganese than iron may be added without making the alloy too difiicult to work.

Monel metal possesses the following constituents in approximately the proportions set forth:

Nickel 67% Copper 28% Iron and manganese 5% I have found wide variations in the electrical resistance of Monel metal due to nonuniform composition and that such variations can be almost eliminated in the alloy produced after the addition of iron, manganese or ferromanganese in "quantities calculated from the composition of the Monel metal used, so as to have the percentages of iron and manganese in the resulting alloy, constant within limits.

The percentage of iron which may be allowed in the resulting material after proper additions, without making the alloy too hard and brittle for working by customary methods is 15%, while the percentage of manganese which may be allowed is 25%.

After adding iron, manganese or ferromanganese to the Monel metal, for the purpose of increasing the electrical resistance, a series of alloys can be produced having specific electrical resistance in excess of 300 ohms per circular mil-foot, and in some cases in excess of 500 ohms per circular milfoot, and the alloys are very strong, can be worked by ordinary and well-known metalworking methods, can be easily cast, and have properties very similar to those of Monel metal with regard to resistance to corrosion, erosion and oxidation, besides having a much greater electrical resistance than that of Monel metal.

Such series of alloys I have found possess high electrical resistance varying from approximately 30 to 50 times that of copper, depending on the composition; high tensile strength, when drawn, being in excess of I might make it desirable,

purposes, although manifestly it may be put,

to mechanical purposes where circumstances since the resulting alloy may be cast, drawn, rolled, forged or machine and possesses in addition great strength, non-corrodibility and durability.

Havmg thus described my invention what I claim as new herein and desire to secure by Letters Patent is:

1. An alloy for electrical-resistance elements consisting of nickel, copper, iron, and manganese, the iron content being greater than 2% and the manganese content being within the limits of 2% and 25% by weight.

2. An alloy for electrical-resistance elements consisting of nickel, copper, manganese, and iron, the manganese content being greater than 2% and the iron content being within the limits of 2% and 15% by weight.

3. An alloy for electrical-resistance elements consisting of copper, iron, manganese and nickel, the iron andmanganese content being each greater than 2% and the nickel content being withinthe limits of 40% and 65%by weight.

4. An alloy for electrical-resistance elements consisting of nickel, iron, manganese, and copper, the combined iron and manganese content being not less than 5% and the copper being within the limits of 20% and 30% by weight.

5. An alloy for electrical-resistance elements consisting of nickel, copper, from-2% to 15% by weight of iron and 2% to 25% by weight of manganese.

6. An alloy for electrical-resistance elements consisting of nickel, from 20% to 30% by weight of copper, 2% to 15% by weight of iron and 2% to 25% by weight of manganese.

7. An alloy for electrical-resistance ele ments consisting of copper, from 40% to 65% by weight of nickel, 2% to 15% by weight of iron and 2% to 25% by weight of manganese.

8. An alloy for electrical-resistance elements consisting of from 40% to 65% by weight of nickel, 20% to 30% by weight of copper, 2% to 15% by weight of iron and 2% to 25% by weight of manganese.

9. A composition of matter consisting of copper, iron, manganese and not more than 65% by weight of nickel, the combined percentage of iron and manganese being not less than 5%. r

10. A composition of matter consisting of nickel, copper, iron and manganese, the latter exceeding 2% by weight and-the combined percentage of manganese and iron being not less than 5%.

11. A composition of matter consistingof nickel, copper, manganese and iron, the lat ter exceeding 2% by weight and the combined iron and manganese content being not less than 5%.

12. A composition of matter consisting of nickel, copper, iron and manganese, the iron being equal to about 2% or more and the manganese exceeding 2% by weight but not exceeding 25% by weight.

13. A composition of matter consisting of nickel, copper, manganese and iron, the manganese being equal to about 2% or more and the iron exceeding 2% but not exceeding 15% b weight. I

14. Zn alloy consisting of nickel, copper, iron and manganese, the percentage by weight of the latter two combined being from 5% to 40%, but neither less than 2%,

ing of nickel not greater than 65% by weight, copper not greater than 30% by weight, iron not greater than 15% by weight, and manganese not greater than 25%" by weight, neither the iron nor the manganese being less than 2% and the combined per- 1 centage thereofbeing not less than 5%.

17. An electrical-resistance alloy consisting of nickel, copper, iron and manganese the nickel and copper combined being not less than 60% by weight and not more than 1 95% by weight, the iron and manganese combined being greater than 4% by weight and not more than 40% by weight.

18. An alloy similar to Monel metal but having higher than that of Monel metal up to about 500 ohms per circular mil-foot, said alloy being composed of nickel, copper, manganese and iron, the combined percentage of mananese and iron being greater than that of 12 loiiel metal and equal to a value dependent upon the resistivity desired tobe obtained, at least one of said last-mentioned ingredients being present to a value not less than any desired electrical resistivity 19. An alloy having high resistivity to the 20. An alloy composed of the same ingreelectrical current and composed of nickel, clients as Monel metal and having substancopper, manganese and iron, the percentage tially the same properties, but containing 10 of manganese and iron combined exceeding iron and manganese together in proportion that of Monel metal by a quantity dependent above that of Monel metal to render the upon the electrical resistivity Which it is alloy of high resistance to electrical current. desired to impart to the alloy. AMBROSE J. MANDELL'.