AT143620B - Manufacture of objects that must be resistant to attack by decarburizing gases, especially at high temperatures and pressures. - Google Patents
Manufacture of objects that must be resistant to attack by decarburizing gases, especially at high temperatures and pressures.Info
- Publication number
- AT143620B AT143620B AT143620DA AT143620B AT 143620 B AT143620 B AT 143620B AT 143620D A AT143620D A AT 143620DA AT 143620 B AT143620 B AT 143620B
- Authority
- AT
- Austria
- Prior art keywords
- sep
- titanium
- resistant
- pressures
- attack
- Prior art date
Links
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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/04—Preparation of ammonia by synthesis in the gas phase
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Catalysts (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Steel (AREA)
Description
<Desc/Clms Page number 1>
Herstellung von Gegenständen, die gegen den Angriff entkohlender Gase, insbesondere bei hohen
Temperaturen und Drücken, widerstandsfähig sein müssen.
Es ist bekannt, die beim Arbeiten mit Wasserstoff oder wasserstoffhaltigen Gasgemischen unter Druck und bei erhöhter Temperatur verwendeten drucktragenden Apparateteile aus legierten Edelstählen herzustellen, die Chrom, Wolfram, Molybdän oder Vanadium und gegebenenfalls auch Nickel enthalten. Ferner ist es bekannt, bei der Herstellung von Apparaten zum Kracken von Ölen und Teeren nickelfreie Stahllegierungen zu verwenden, die bis 13% Chrom enthalten und denen noch 0'3-4% Aluminium, 0'2-2'5% Kupfer und bis 2% Silizium, Molybdän, Vanadium, Titan oder Beryllium, einzeln oder gleichzeitig, zugesetzt werden können.
Schliesslich ist auch die Verwendung von Spezialstählen, die neben Mangan, Chrom, Wolfram, Vanadium oder Molybdän noch Titan enthalten, zur Herstellung von Apparaten und Apparateteilen, die gegen den entkohlend wirkenden Angriff von Wasserstoff bei hohen Drücken und Temperaturen widerstandsfähig sein müssen, bekannt.
Die Erfindung bezieht sich ebenfalls auf die Herstellung von Gegenständen (z. B. von Apparaten und Apparateteilen zum spaltenden Hydrieren von Ölen und Kohlen sowie zur Ammoniaksynthese), die gegen den Angriff entkohlender Gase (z. B. Wasserstoff und wasserstoffhaltige Gasgemische), insbesondere bei hohen Temperaturen und Drücken, widerstandsfähig sein müssen. Erfindungsgemäss werden diese Gegenstände auch aus einer titanhaitigen Stahllegierung hergestellt, die aber mindestens das Vierfache ihres Kohlenstoffgehaltes an Titan enthält.
Es hat sich nämlich gezeigt, dass dann Titan in weit höherem Masse als Chrom, Wolfram, Molyb- dän und Vanadium die Fähigkeit besitzt, Stahl gegen die Einwirkung entkohlender Gase, z. B. gegen den bei hohen Temperaturen und Drücken erfolgenden Angriff von Wasserstoff, widerstandsfähig zu machen. Die grössere Widerstandsfähigkeit eines solchen Titanstahles gegen Wasserstoff bei hohen Drücken und Temperaturen geht z.
B. aus dem nachstehenden Versuch hervor :
Aus drei Stahllegierungen von folgender Zusammensetzung :
EMI1.1
<tb>
<tb> 1. <SEP> 0. <SEP> 15% <SEP> C, <SEP> 0. <SEP> 24% <SEP> Si, <SEP> 0-38% <SEP> Mn, <SEP> 3-18% <SEP> Cr, <SEP> 0. <SEP> 39% <SEP> Mo,
<tb> 2. <SEP> 0. <SEP> 20% <SEP> C, <SEP> 0-28% <SEP> Si, <SEP> 0-66% <SEP> Mn, <SEP> 0. <SEP> 50% <SEP> Ti,
<tb> 3. <SEP> 0'11% <SEP> c, <SEP> 0. <SEP> 33% <SEP> Si, <SEP> 0-50% <SEP> Mn, <SEP> 0-46% <SEP> Ti,
<tb>
wurden Rohre hergestellt mit einem äusseren Durchmesser von 30 mm und einem inneren Durchmesser von 12 mm. Durch diese Rohre wurde Wasserstoff unter einem Druck von 300 Atm. und bei einer Temperatur von 700 C geleitet. Das aus dem Stahl 1 hergestellte Rohr platzte nach 48 Stunden. Eine Untersuchung des zerstörten Rohres ergab, dass es bis zu einer Tiefe von 2 mm entkohlt war.
Das aus Stahl 2 hergestellte Rohr platzte nach 5 Stunden auf und war bis zu einer Tiefe von 3 mm entkohlt. Das aus Stahl 3 bestehende Rohr war nach 100 Versuchsstunden noch unbeschädigt und zeigte keine Entkohlung.
Der Kohlenstoffgehalt der erfindungsgemäss verwendeten Stahllegierungen soll zweckmässig 1% nicht übersteigen. Der Titangehalt beträgt dann zweckmässig etwa bis 5%. Der Titangehalt wird deshalb mindestens viermal so gross gehalten wie der Kohlenstoffgehalt, um den gesamten Kohlenstoff an Titan als Titankarbid (Ti C) zu binden.
Zur Verbesserung der mechanischen Eigenschaften können den erfindungsgemäss verwendeten
EMI1.2
<Desc/Clms Page number 2>
Molybdän, Vanadium (bis zu 30%) zugesetzt werden. Im allgemeinen wird man jedoch mit einem Gehalt bis zu 15% an Zusatzbestandteilen auskommen. Auch bei Anwesenheit dieser weiteren Legierungselemente bleibt das Titan der Hauptträger der Widerstandsfähigkeit gegen die Entkohlung, wenn der Titangehalt mindestens viermal so gross ist wie der Kohlenstoffgehalt.
Als besonders für den Verwendungszweck nach der Erfindung geeignet haben sich solche Stahllegierungen erwiesen, die etwa bis 0'4% Kohlenstoff, bis 2% Titan, bis 3% Molybdän oder Vanadium, einzeln oder gemischt, und gegebenenfalls bis 10% Chrom enthalten.
Für Apparate zum spaltenden Hydrieren von Ölen und Steinkohlen sowie zur Ammoniaksynthese können beispielsweise folgende Stahllegierungen. verwendet werden :
EMI2.1
<tb>
<tb> 1. <SEP> eine <SEP> Stahllegierung <SEP> mit <SEP> etwa <SEP> 0'15% <SEP> C, <SEP> 0-23 <SEP> % <SEP> Si, <SEP> 0-36% <SEP> Mn, <SEP> 0-80 <SEP> % <SEP> Cr, <SEP> 0-40 <SEP> % <SEP> Mo <SEP> und <SEP> 0-83% <SEP> Ti,
<tb> 2. <SEP> eine <SEP> Stahllegierung <SEP> mit <SEP> etwa <SEP> 0. <SEP> 10% <SEP> C, <SEP> 0. <SEP> 50% <SEP> Si, <SEP> 0. <SEP> 40% <SEP> Mn, <SEP> 0. <SEP> 80% <SEP> Cr, <SEP> 2-2% <SEP> Mo <SEP> und <SEP> 0-50% <SEP> Ti,
<tb> 3. <SEP> eine <SEP> Stahllegierung <SEP> mit <SEP> etwa <SEP> 0#10% <SEP> C, <SEP> 0#30% <SEP> Si, <SEP> 0#40% <SEP> Mn, <SEP> 0#-1#0% <SEP> Mo <SEP> und <SEP> 0-50% <SEP> Ti,
<tb> 4.
<SEP> eine <SEP> Stahllegierung <SEP> mit <SEP> etwa <SEP> 0#10% <SEP> C, <SEP> 1#5% <SEP> Si, <SEP> 0#50% <SEP> Mn, <SEP> 6-0% <SEP> Cr, <SEP> 0-4% <SEP> Mo <SEP> und <SEP> 0. <SEP> 50% <SEP> Ti.
<tb>
PATENT-ANSPRÜCHE :
1. Herstellung von Gegenständen, die gegen den Angriff entkohlender Gase, insbesondere bei hohen Temperaturen und Drücken, widerstandsfähig sein müssen, aus titanhaltigen Stahllegierungen, dadurch gekennzeichnet, dass sie mindestens das Vierfache ihres Kohlenstoffgehaltes an Titan enthalten.
<Desc / Clms Page number 1>
Manufacture of items that are resistant to attack by decarburizing gases, especially at high levels
Temperatures and pressures, must be resistant.
It is known to produce the pressure-bearing apparatus parts used when working with hydrogen or hydrogen-containing gas mixtures under pressure and at elevated temperature from alloyed stainless steels which contain chromium, tungsten, molybdenum or vanadium and possibly also nickel. It is also known to use nickel-free steel alloys in the production of apparatus for cracking oils and tars which contain up to 13% chromium and which also contain 0-3-4% aluminum, 0-2-2-5% copper and up to 2% % Silicon, molybdenum, vanadium, titanium or beryllium, individually or simultaneously, can be added.
Finally, the use of special steels, which in addition to manganese, chromium, tungsten, vanadium or molybdenum also contain titanium, for the production of apparatus and apparatus parts that must be resistant to the decarburizing attack of hydrogen at high pressures and temperatures is known.
The invention also relates to the production of objects (e.g. apparatus and apparatus parts for the splitting hydrogenation of oils and coals and for the synthesis of ammonia) which are resistant to attack by decarburizing gases (e.g. hydrogen and hydrogen-containing gas mixtures), in particular in high temperatures and pressures, must be resistant. According to the invention, these objects are also made from a titanium-containing steel alloy which, however, contains at least four times its carbon content in titanium.
It has been shown that titanium then has the ability to a far greater extent than chromium, tungsten, molybdenum and vanadium to protect steel against the effects of decarburizing gases, e.g. B. to make resistant to the attack of hydrogen at high temperatures and pressures. The greater resistance of such a titanium steel to hydrogen at high pressures and temperatures is z.
B. from the following experiment:
Made of three steel alloys with the following composition:
EMI1.1
<tb>
<tb> 1. <SEP> 0. <SEP> 15% <SEP> C, <SEP> 0. <SEP> 24% <SEP> Si, <SEP> 0-38% <SEP> Mn, <SEP> 3-18% <SEP> Cr, <SEP> 0. <SEP> 39% <SEP> Mo,
<tb> 2. <SEP> 0. <SEP> 20% <SEP> C, <SEP> 0-28% <SEP> Si, <SEP> 0-66% <SEP> Mn, <SEP> 0. < SEP> 50% <SEP> Ti,
<tb> 3. <SEP> 0'11% <SEP> c, <SEP> 0. <SEP> 33% <SEP> Si, <SEP> 0-50% <SEP> Mn, <SEP> 0-46 % <SEP> Ti,
<tb>
Pipes were produced with an outer diameter of 30 mm and an inner diameter of 12 mm. Hydrogen was passed through these pipes under a pressure of 300 atm. and passed at a temperature of 700 C. The pipe made from steel 1 burst after 48 hours. An examination of the destroyed pipe showed that it was decarburized to a depth of 2 mm.
The pipe made of steel 2 burst open after 5 hours and was decarburized to a depth of 3 mm. The pipe made of steel 3 was still undamaged after 100 hours of testing and showed no decarburization.
The carbon content of the steel alloys used according to the invention should expediently not exceed 1%. The titanium content is then expediently about up to 5%. The titanium content is therefore kept at least four times as high as the carbon content in order to bind all of the carbon to titanium as titanium carbide (Ti C).
To improve the mechanical properties, those used according to the invention can be used
EMI1.2
<Desc / Clms Page number 2>
Molybdenum, vanadium (up to 30%) can be added. In general, however, you will get by with a content of up to 15% of additional components. Even in the presence of these additional alloying elements, the titanium remains the main carrier of resistance to decarburization if the titanium content is at least four times as high as the carbon content.
Steel alloys which have proven to be particularly suitable for the purpose according to the invention are those which contain up to 0.4% carbon, up to 2% titanium, up to 3% molybdenum or vanadium, individually or mixed, and optionally up to 10% chromium.
The following steel alloys, for example, can be used for apparatus for the splitting hydrogenation of oils and hard coal and for ammonia synthesis. be used :
EMI2.1
<tb>
<tb> 1. <SEP> a <SEP> steel alloy <SEP> with <SEP> about <SEP> 0'15% <SEP> C, <SEP> 0-23 <SEP>% <SEP> Si, <SEP > 0-36% <SEP> Mn, <SEP> 0-80 <SEP>% <SEP> Cr, <SEP> 0-40 <SEP>% <SEP> Mo <SEP> and <SEP> 0-83% <SEP> Ti,
<tb> 2. <SEP> a <SEP> steel alloy <SEP> with <SEP> about <SEP> 0. <SEP> 10% <SEP> C, <SEP> 0. <SEP> 50% <SEP> Si , <SEP> 0. <SEP> 40% <SEP> Mn, <SEP> 0. <SEP> 80% <SEP> Cr, <SEP> 2-2% <SEP> Mo <SEP> and <SEP> 0 -50% <SEP> Ti,
<tb> 3. <SEP> a <SEP> steel alloy <SEP> with <SEP> about <SEP> 0 # 10% <SEP> C, <SEP> 0 # 30% <SEP> Si, <SEP> 0 # 40% <SEP> Mn, <SEP> 0 # -1 # 0% <SEP> Mo <SEP> and <SEP> 0-50% <SEP> Ti,
<tb> 4.
<SEP> a <SEP> steel alloy <SEP> with <SEP> about <SEP> 0 # 10% <SEP> C, <SEP> 1 # 5% <SEP> Si, <SEP> 0 # 50% <SEP> Mn, <SEP> 6-0% <SEP> Cr, <SEP> 0-4% <SEP> Mo <SEP> and <SEP> 0. <SEP> 50% <SEP> Ti.
<tb>
PATENT CLAIMS:
1. Manufacture of objects that must be resistant to attack by decarburizing gases, especially at high temperatures and pressures, from titanium-containing steel alloys, characterized in that they contain at least four times their carbon content in titanium.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1932K0128126 DE692226C (en) | 1932-12-08 | 1932-12-08 | Containers and container parts for the splitting hydrogenation of oils and coals as well as for ammonia synthesis, which have to be resistant to the decarburizing attack of hydrogen and hydrogen-containing gas mixtures at high temperatures and pressures |
DE1933K0129566 DE687503C (en) | 1932-12-08 | 1933-03-21 | Manufacture of items that have to be resistant to attack by decarburizing gases |
Publications (1)
Publication Number | Publication Date |
---|---|
AT143620B true AT143620B (en) | 1935-11-25 |
Family
ID=34105324
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT143620D AT143620B (en) | 1932-12-08 | 1933-11-27 | Manufacture of objects that must be resistant to attack by decarburizing gases, especially at high temperatures and pressures. |
AT145805D AT145805B (en) | 1932-12-08 | 1934-02-22 | Manufacture of objects that have to be resistant to attack by decarburizing gases, especially at high temperatures and pressures. |
AT143623D AT143623B (en) | 1932-12-08 | 1934-02-22 | Manufacture of objects that must be resistant to attack by decarburizing gases, especially at high temperatures and pressures. |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT145805D AT145805B (en) | 1932-12-08 | 1934-02-22 | Manufacture of objects that have to be resistant to attack by decarburizing gases, especially at high temperatures and pressures. |
AT143623D AT143623B (en) | 1932-12-08 | 1934-02-22 | Manufacture of objects that must be resistant to attack by decarburizing gases, especially at high temperatures and pressures. |
Country Status (4)
Country | Link |
---|---|
US (3) | US2059893A (en) |
AT (3) | AT143620B (en) |
DE (2) | DE692226C (en) |
GB (4) | GB419009A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767100C (en) * | 1941-04-30 | 1952-05-02 | Roehrenwerke A G Deutsche | Material for objects that should have high durability |
DE917674C (en) * | 1942-09-19 | 1954-09-09 | Rheinische Roehrenwerke Ag | Steel for seals |
DE941491C (en) * | 1940-11-03 | 1956-04-12 | Phoenix Rheinrohr Ag Vereinigt | Ferritic or ferritic-pearlitic steels for objects that should have a high heat resistance of over 800 |
DE945150C (en) * | 1941-10-03 | 1956-07-05 | Phoenix Rheinrohr Ag Vereinigt | Steel alloy for durable objects with good notch toughness |
DE949826C (en) * | 1941-08-05 | 1956-09-27 | Phoenix Rheinrohr Ag Vereinigt | Durable steel alloy |
DE954062C (en) * | 1941-09-25 | 1956-12-13 | Phoenix Rheinrohr Ag Vereinigt | Durable steel alloy |
DE965638C (en) * | 1941-12-28 | 1957-06-13 | Phoenix Rheinrohr Ag Vereinigt | Titanium-containing chrome steels for cast steel parts with high fatigue strength |
DE968276C (en) * | 1941-12-28 | 1958-01-30 | Phoenix Rheinrohr Ag Vereinigt | Durable steel alloys |
DE972264C (en) * | 1941-06-07 | 1959-06-18 | Phoenix Rheinrohr Ag Vereinigt | Steel for objects that must have a high level of durability |
DE973061C (en) * | 1941-02-20 | 1959-11-19 | Phoenix Rheinrohr Ag Vereinigt | Steel for seamless tubes |
DE976854C (en) * | 1951-12-06 | 1964-06-11 | Goodrich Co B F | Material for the conversion chamber for the production of hydrogen cyanide |
DE1178609B (en) * | 1957-05-23 | 1964-09-24 | Lukens Steel Co | Low-alloy, easily weldable steel suitable for pressure vessels and components used in the same way |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE756064C (en) * | 1935-11-09 | 1953-11-09 | Ig Farbenindustrie Ag | Devices made of high-alloy chromium steel containing silicon for the thermal treatment of coal and hydrocarbons |
DE916829C (en) * | 1940-06-05 | 1954-08-19 | Rheinische Roehrenwerke Ag | Steel alloys resistant to intergranular corrosion |
US2716271A (en) * | 1943-09-22 | 1955-08-30 | Smith Corp A O | Enameling process and article produced thereby |
US2495835A (en) * | 1945-10-15 | 1950-01-31 | George N Hibben | Light-colored enameled steel article |
US2506226A (en) * | 1946-04-12 | 1950-05-02 | Hydrocarbon Research Inc | Stainless steel catalyst for hydrocarbon synthesis |
US2586535A (en) * | 1948-12-29 | 1952-02-19 | Universal Oil Prod Co | Catalytic hydrogenation of aromatic hydrocarbons in a stainless steel reactor |
US2683086A (en) * | 1952-08-28 | 1954-07-06 | Timken Roller Bearing Co | Low alloy steel containing boron and titanium for high-temperature use |
US2797146A (en) * | 1955-08-08 | 1957-06-25 | Nat Distillers Chem Corp | Mixing apparatus and process utilizing same |
JPS498765B1 (en) * | 1969-08-27 | 1974-02-28 | ||
US4119445A (en) * | 1971-05-10 | 1978-10-10 | Youngstown Sheet And Tube Company | High strength alloy of ferritic structure |
IT1075397B (en) * | 1977-04-15 | 1985-04-22 | Snam Progetti | METHANATION REACTOR |
FR2434649A1 (en) * | 1978-09-01 | 1980-03-28 | Ugine Kuhlmann | REACTOR MADE FROM STEEL PARTICULARLY RESISTANT TO THE EFFECTS OF OXO SYNTHESIS |
US4554135A (en) * | 1982-11-26 | 1985-11-19 | C F Braun & Co. | Ammonia converter |
US4921684A (en) * | 1982-11-26 | 1990-05-01 | C F Braun, Inc. | Ammonia conversion process |
FR2851774B1 (en) | 2003-02-27 | 2006-08-18 | Inst Francais Du Petrole | LOW-ALLOY ANTICOKAGE STEELS WITH INCREASED SILICON AND MANGANESE CONTENT, AND THEIR USE IN REFINING AND PETROCHEMICAL APPLICATIONS |
-
1932
- 1932-12-08 DE DE1932K0128126 patent/DE692226C/en not_active Expired
-
1933
- 1933-03-21 DE DE1933K0129566 patent/DE687503C/en not_active Expired
- 1933-11-22 US US699300A patent/US2059893A/en not_active Expired - Lifetime
- 1933-11-27 AT AT143620D patent/AT143620B/en active
- 1933-11-29 GB GB33504/33A patent/GB419009A/en not_active Expired
-
1934
- 1934-02-22 AT AT145805D patent/AT145805B/en active
- 1934-02-22 AT AT143623D patent/AT143623B/en active
- 1934-02-26 GB GB6244/34A patent/GB425073A/en not_active Expired
- 1934-03-03 US US713925A patent/US2109118A/en not_active Expired - Lifetime
- 1934-03-03 US US713926A patent/US2109119A/en not_active Expired - Lifetime
- 1934-03-19 GB GB8611/34A patent/GB427585A/en not_active Expired
- 1934-03-19 GB GB8537/34A patent/GB420567A/en not_active Expired
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE941491C (en) * | 1940-11-03 | 1956-04-12 | Phoenix Rheinrohr Ag Vereinigt | Ferritic or ferritic-pearlitic steels for objects that should have a high heat resistance of over 800 |
DE973061C (en) * | 1941-02-20 | 1959-11-19 | Phoenix Rheinrohr Ag Vereinigt | Steel for seamless tubes |
DE767100C (en) * | 1941-04-30 | 1952-05-02 | Roehrenwerke A G Deutsche | Material for objects that should have high durability |
DE972264C (en) * | 1941-06-07 | 1959-06-18 | Phoenix Rheinrohr Ag Vereinigt | Steel for objects that must have a high level of durability |
DE949826C (en) * | 1941-08-05 | 1956-09-27 | Phoenix Rheinrohr Ag Vereinigt | Durable steel alloy |
DE954062C (en) * | 1941-09-25 | 1956-12-13 | Phoenix Rheinrohr Ag Vereinigt | Durable steel alloy |
DE945150C (en) * | 1941-10-03 | 1956-07-05 | Phoenix Rheinrohr Ag Vereinigt | Steel alloy for durable objects with good notch toughness |
DE965638C (en) * | 1941-12-28 | 1957-06-13 | Phoenix Rheinrohr Ag Vereinigt | Titanium-containing chrome steels for cast steel parts with high fatigue strength |
DE968276C (en) * | 1941-12-28 | 1958-01-30 | Phoenix Rheinrohr Ag Vereinigt | Durable steel alloys |
DE917674C (en) * | 1942-09-19 | 1954-09-09 | Rheinische Roehrenwerke Ag | Steel for seals |
DE976854C (en) * | 1951-12-06 | 1964-06-11 | Goodrich Co B F | Material for the conversion chamber for the production of hydrogen cyanide |
DE1178609B (en) * | 1957-05-23 | 1964-09-24 | Lukens Steel Co | Low-alloy, easily weldable steel suitable for pressure vessels and components used in the same way |
Also Published As
Publication number | Publication date |
---|---|
GB419009A (en) | 1934-11-05 |
GB420567A (en) | 1934-12-04 |
US2059893A (en) | 1936-11-03 |
AT143623B (en) | 1935-11-25 |
US2109118A (en) | 1938-02-22 |
US2109119A (en) | 1938-02-22 |
GB425073A (en) | 1935-03-06 |
AT145805B (en) | 1936-05-25 |
DE692226C (en) | 1940-06-15 |
DE687503C (en) | 1940-01-31 |
GB427585A (en) | 1935-04-26 |
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