US1536684A - Stainless steel and hardware articles manufactured therefrom - Google Patents

Description

May 5, l 925.

H. H. MORGAN STAINLESS STEEL AND HARDWARE ARTICLES MANUFACTURED THEREFROM Filed Dec. 13 1922 UNITED STATES PATENT OFFICE.

HAROLD H. MO'RGAN, OF PITTSBURGH, PENNSYLVANIA.

STAINLESS STEEL AND HARDWARE ARTICLES MANUFACTURED THEREFROM.

Application filed December 13, 1922. Serial No. 606,612.

To all whom it may concern:

Be it known that I, HAROLD H. MORGAN, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Stainless Steel and Hardware Articles Manufactured Therefrom, of which the following is a specification.

This invention relates to improvements in stainless steel and hardware articles manufactured therefrom. I have found that hardware articles such as, for example, cutlery, door knobs and the like, manufactured from an alloy steel in accordance with this specification, possess many highly desirable physical properties. For example, they are non-corrosive, non-magnetic, and resist rust and attack by acids. They are also non-brittle, tough, and sufliciently hard. The alloy steel, to be hereinafter described, is also Well adapted for the manufacture of such articles.

In the drawings, I have shown, for illustration, two articles of hardware manufactured from the stainless steel, to be hereinafter described. In Figure 1, I have shown in perspective an article of cutlery, and in Figure 2, a door knob.

The articles of manufacture illustrated in the drawing are manufactured from an alloy steel containing from 6 to 20 per cent of manganese and from 2 to 30 per cent of nickel. The manganese and nickel can advantageously be used in substantially equal proportions, though any variations of these proportions may be made'as desired, to effect the physical properties and corresponding usefulness for specific purposes. I have found that the use of from 10 to 15 per cent of manganese and 10 to 20 per cent of nickel will give the most desirable results.

The alloy steel may also have some car bon. The carbon content should ordinarily not exceed one per cent and for most purposes should be less than per cent, al-

though more carbon may be used for particular purposes.

A steel made in accordance with my specification, will befound to be Very workable hot and also adapted to be formed cold into many articles of manufacture in connection with which toughness, strength, or resistance to corrosion are desirable.

It is a matter of common experience that nickel and cobalt have many like chemical and physical properties and that their metallurgical effects in alloyed steels are generally alike; so I desire to be understood that in the appended claim, I intend to cover the use of cobalt and other similar metals as a substitute for nickel in whole or in part. Likewise, in regard to other ingredients, I intend to cover other substances having the same or similar necessary properties.

The alloy steel may contain also the usual small quantities of phosphorus, sulphur, silicon and the like; and such other alloying elements as may be found desirable. I have found that silicon, for certain specific uses, may be used advantageously in percentages up to 5 per cent.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claim, in which it is my intension to claim all novelty inherent in my invention as broadly as possible in view of the prior art.

What I claim as new and desire to secure by Letters Patent, is:

An article of cutlery manufactured from 35 steel containing from about 2 to 30 per cent of nickel and from about 6 to 20 per cent of man 'anese.

'W1tness my hand and seal this 7th day of December, 1922.

HAROLD H. MORGAN. a 8.

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