US1026461A - Safe or steel-vault wall. - Google Patents
Safe or steel-vault wall. Download PDFInfo
- Publication number
- US1026461A US1026461A US55381010A US1910553810A US1026461A US 1026461 A US1026461 A US 1026461A US 55381010 A US55381010 A US 55381010A US 1910553810 A US1910553810 A US 1910553810A US 1026461 A US1026461 A US 1026461A
- Authority
- US
- United States
- Prior art keywords
- steel
- safe
- vault wall
- chromium
- carbon
- 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 - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
Definitions
- composition of the steel'tq drogen gas, acetylene, et cetera composition of the steel'tq drogen gas, acetylene, et cetera.
- the object of this invention is to remove this disadvantage. This object is attained by using an iron-carbon alloy having the which is added a sufficient amount of chromium.
- the chromium content In alloys which, aside from the chromium, contain no other addition affecting the resistance of the alloy against melting the mimimum content of chromium must be about 6.5% for 0.7% (1, about 5.5% for 1.0% C., about 4.3% for 1.4% (1., about 4.0% for 2.0% o.
- a safe or steel-vault wall made from an iron-carbon alloy having the composition Patented May 14, 1912. Application filed April 3, 1910. Serial No. 553,810.
- a safe or steel-vault wall made from an iron-carbon alloy having the composi tion of steel and containing such a high' amount of chromium and tungsten, that it cannot be melted through by the blow-pipe flame of oxyhydrogen gas.
- a safe or steel-vault wall made from an iron-carbon alloy having the composition of steel and containing more than 1% carbon, more than 9% chromium and more than 3% tungsten.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Description
UNITED STATES PATENT OFFICE.
rmfiz WILHELM SCHILLING, or ESSEN-ON-THE-RUI-IR, GERMANY, AssIGNoR 'ro FRIED. KRUPP AKTIENGESELLSCHAFT, or ESSEN-ON-THE-RUHR, GERMANY.
SAFE OR STEEL-VAULT WALL.
No Drawing.
' To all whom it may concern:
' through by the blow-pipe flame of oXyhy-,
composition of the steel'tq drogen gas, acetylene, et cetera.
It is old to employ a special kind of cast iron for the-production of 'such walls. However in that case it is necessary to take into account the disadvantage of'brittlenessincident to all cast irons.
The object of this invention is to remove this disadvantage. This object is attained by using an iron-carbon alloy having the which is added a sufficient amount of chromium.
The smaller the carbon content is the greater must the chromium content be. In alloys which, aside from the chromium, contain no other addition affecting the resistance of the alloy against melting the mimimum content of chromium must be about 6.5% for 0.7% (1, about 5.5% for 1.0% C., about 4.3% for 1.4% (1., about 4.0% for 2.0% o.
Generally the necessary minimum content of chromium amounts to if C indicates the percentage o'f carbon.
Under certain circumstances it is,preferable to add tungsten (W) or silicon besides Specification of Letters Patent.
for instance, by an alloy which contains.
more than 1% C, 9% Cr and 3% W.
Having thus described the invention what is claimed and desired to be secured by Letters Patent is:
1. A safe or steel-vault wall made from an iron-carbon alloy having the composition Patented May 14, 1912. Application filed April 3, 1910. Serial No. 553,810.
of steel and containing such a high amount of chromium, that it cannot be' melted through by the blow-pipe flame of oxyhy drogen gas.-
2. A safe or steel-vault wall made from an iron-carbon alloy having the composi tion of steel and containing such a high' amount of chromium and tungsten, that it cannot be melted through by the blow-pipe flame of oxyhydrogen gas.
3. A safe or steel-vault wall, made from an iron-carbon alloy having the composition of steel and containing more than 1% carbon, more than 9% chromium and more than 3% tungsten. f
The foregoing specification signed at Barmcn, Germany, this 22nd day of March, 1910. 1
FRANZ WILHELM SGHIL'LING. [L. 8.]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55381010A US1026461A (en) | 1910-04-06 | 1910-04-06 | Safe or steel-vault wall. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55381010A US1026461A (en) | 1910-04-06 | 1910-04-06 | Safe or steel-vault wall. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1026461A true US1026461A (en) | 1912-05-14 |
Family
ID=3094756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US55381010A Expired - Lifetime US1026461A (en) | 1910-04-06 | 1910-04-06 | Safe or steel-vault wall. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1026461A (en) |
-
1910
- 1910-04-06 US US55381010A patent/US1026461A/en not_active Expired - Lifetime
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