EP0708184A1 - High-strength austenitic heat-resisting steel with excellent weldability and good high-temperature corrosion resistance - Google Patents
High-strength austenitic heat-resisting steel with excellent weldability and good high-temperature corrosion resistance Download PDFInfo
- Publication number
- EP0708184A1 EP0708184A1 EP94914608A EP94914608A EP0708184A1 EP 0708184 A1 EP0708184 A1 EP 0708184A1 EP 94914608 A EP94914608 A EP 94914608A EP 94914608 A EP94914608 A EP 94914608A EP 0708184 A1 EP0708184 A1 EP 0708184A1
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- EP
- European Patent Office
- Prior art keywords
- corrosion resistance
- temperature corrosion
- content
- strength
- austenitic heat
- 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.)
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Classifications
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- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
Definitions
- thermal power plants are planning extra super critical temperature boilers with high-temperature, high-pressure steam conditions.
- high-strength steels developed for withstanding use in such harsh environments include austenitic heat-resistant steels utilizing precipitation strengthening by carbo-nitrides of Nb, Ti and the like and solution strengthening by Mo.
- the object of this invention is to provide an austenitic heat-resistant steel that exhibits good weldability and is excellent in high-temperature strength and high-temperature corrosion resistance property.
- the inventors conducted various experiments regarding steel added with Mo and W in order to offset by solution strengthening the loss of high-temperature strength caused by reduction of C content and, as a result, succeeded in developing a heat-resistant steel which maintains high-temperature strength at a low C content while also securing high-temperature corrosion resistance property.
- the gist of this invention is as follows:
- Figure 1 is a graph showing the effect of Mo and W on the high-temperature corrosion resistance property of 20 Cr - 25 Ni steel.
- Si not only is effective as a deoxidizing agent but is also an element which improves oxidation resistance and high-temperature corrosion resistance property, but an excessive Si content reduces creep rupture strength, toughness and weldability.
- the upper limit is therefore set at 1.5%.
- Mn is an element which has deoxidizing activity and improves weldability and hot workability.
- the lower limit of Mn is set at 0.3%. Since an excessive Mn content degrades oxidation resistance, however, the upper limit is set to 1.5%.
- Cr is an indispensable element for oxidation resistance, water vapor oxidation resistance and high-temperature corrosion resistance property.
- the lower limit of Cr content is set at 18%, which is the same as the Cr content of austenitic stainless steels.
- the upper limit is set at 26%.
- Ni is an element required for increasing the stability of the austenite and suppressing formation of an intermetallic compound ⁇ phase.
- An Ni content of not less than 20% is necessary for ensuring stability of the austenite against the content of Cr and other ferrite forming elements.
- the Ni content is set at 20 - 40%.
- Mo and W are both elements which markedly increase high-temperature strength as by entering solid solution. Neither has much effect when added at less than 0.5%, while addition of W at more than 10% leads to precipitation of intermetallic compounds such as Laves phase and reduces creep rupture ductility.
- Mo is added alone, the high-temperature corrosion resistance property worsens as the Mo content increases.
- tests show that adding W alone does not degrade the high-temperature corrosion resistance property and that adding it in combination with Mo improves the high-temperature corrosion resistance property over that of a steel added with Mo alone. Therefore, W is always added, and the range thereof is set at 0.5 - 10%. As Mo in particular degrades the high-temperature corrosion resistance property when added in excess of 2.0%, even when added in combination with W, it is added, when required, at 0.5 - 2.0%.
- Nb and Ti markedly improve long-term creep rupture strength by forming minute carbo-nitrides. Since this effect is not obtained when the Nb content is less than 0.05% or the Ti content is less than 0.01%, the lower limits of Nb and Ti content are set at 0.05% and 0.01%. Although the aforesaid effect becomes more pronounced as the content of Nb and Ti soluble at the solid solution treatment temperature increases, adding Nb and Ti in excess of the solution limit degrades the creep rupture strength owing to the undissolved carbo-nitrides that remain. Therefore, the upper limits of Nb and Ti content are set at 0.4% and 0.2%, and for increasing the solid solution (Nb + Ti) content within these ranges, Nb and Ti are added in combination.
- B is an element which has the effect of enhancing intergranular strength and increasing creep rupture strength. However, since this effect is small at less than 0.003% and a content exceeding 0.008% degrades weldability and hot workability, the B content range is set at 0.003 - 0.008%.
- N is an element which markedly improves creep rupture strength by solution strengthening and formation of nitrides.
- N cannot offset the loss of strength resulting from the reduction of C content for improving weldability, while addition at more than 0.3% produces little increase in long-term creep rupture strength but degrades toughness. Therefore, the N content range is set at 0.05 - 0.3%.
- Table 1 and Table 2 (continued from Table 1) show the chemical compositions and material properties of tested steel specimens. After solution treatment at 1250°C , these steels were subjected to creep rupture test at 700 and 750°C and to high-temperature corrosion test at 700°C . The creep rupture strength data was organized using the Larson-Miller method for estimating the 700°C x 100,000 h rupture strength.
- a - J are invention steels and K - U are comparison steels.
- K corresponds to the widely used SUS347H.
- the invention steels have high-temperature strengths and high-temperature corrosion resistance properties that are very superior in comparison with the SUS347H steel.
- L - O are examples having low high-temperature strength because they contain neither Mo or W and their Nb or B content is outside the range of the invention.
- P - U are examples with relatively high high-temperature strength but having poor high-temperature corrosion resistance property notwithstanding addition of Mo alone or in combination with W, owing to large Mo content.
- Figure 1 shows the effect of Mo and W on the high-temperature corrosion resistance property of 20 Cr - 25 Ni steel. While corrosion weight loss is large when Mo is added alone ( ⁇ in the drawing), it will be noted that the high-temperature corrosion resistance property is improved when W is added in combination at 1.5% ( ⁇ in the figure). It can further be seen that the corrosion weight loss does not change when W is added alone ( ⁇ in the figure).
- This invention enables realization of an austenitic heat-resistant steel that is excellent in weldability and secures high-temperature strength and high-temperature corrosion resistance property. It facilitates application of high-strength steel to high-temperature, high-pressure boilers and enables a reduction of implementation cost.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A high-strength austenitic heat-resisting steel that has excellent weldability and good high-temperature corrosion resistance and can exhibit excellent performance when used as the material of boilers to be used under the conditions becoming more and more severe. The steel comprises less than 0.02 % (by mass, the same will apply hereinbelow) of carbon, at most 1.5 % of silicon, 0.3-1.5 % of manganese, at most 0.02 % of phosphorus, at most 0.005 % of sulfur, 18-26 % of chromium, 20-40 % of nickel, 0.5-10.0 % of tungsten, 0.05-0.4 % of niobium, 0.01-0.2 % of titanium, 0.003-0.008 % of boron, 0.05-0.3 % of nitrogen, and if necessary at least one member of 0.5-2.0 % of molybdenum and/or 0.001-0.05 % of magnesium, 0.001-0.05 % of calcium and 0.001-0.15 % of rare earth element (REM), and the balance consisting of iron and inevitable impurities.
Description
- This invention relates to an austenitic heat-resistant steel exhibiting outstanding high-temperature strength, excellent weldability and good high-temperature corrosion resistance property and displaying excellent performance when utilized in boilers, which are experiencing increasingly harsh use environments.
- From the points of improved economy and the recent move to suppress carbon dioxide gas emissions, thermal power plants are planning extra super critical temperature boilers with high-temperature, high-pressure steam conditions. As pointed out in "Iron and Steel" No.70, p.S-1409 and "Thermal and Nuclear Power Generation" vol.38, p.75, high-strength steels developed for withstanding use in such harsh environments include austenitic heat-resistant steels utilizing precipitation strengthening by carbo-nitrides of Nb, Ti and the like and solution strengthening by Mo.
- Since these heat-resistant steels contain large amounts of alloying elements, however, they cannot be considered easy to weld in comparison with conventional austenitic heat-resistant steel such as SUS347H and, as such, have a problem regarding welding workability.
- Increasing steel purity, specifically, reducing P and S content together with reduction of C content, is know as an effective means of improving weldability. Since as just mentioned, however, most heat-resistant steels are strengthened by carbo-nitrides, reduction of C content leads to reduction of high-temperature strength.
- On the other hand, it is known that increasing the content of Mo frequently added for the purpose of solution-strengthening a steel degrades high-temperature corrosion resistance property.
- The object of this invention is to provide an austenitic heat-resistant steel that exhibits good weldability and is excellent in high-temperature strength and high-temperature corrosion resistance property.
- The inventors conducted various experiments regarding steel added with Mo and W in order to offset by solution strengthening the loss of high-temperature strength caused by reduction of C content and, as a result, succeeded in developing a heat-resistant steel which maintains high-temperature strength at a low C content while also securing high-temperature corrosion resistance property. Specifically, the gist of this invention is as follows:
- (1) A high-strength austenitic heat-resistant steel excellent in weldability and good in high-temperature corrosion resistance property characterized in that it comprises, in mass percent,
- C :
- less than 0.02%,
- Si :
- not more than 1.5%,
- Mn :
- 0.3 - 1.5%,
- P :
- not more than 0.02%,
- S :
- not more than 0.005%,
- Cr :
- 18 - 26%,
- Ni :
- 20 - 40%,
- W :
- 0.5 - 10.0%,
- Nb :
- 0.05 - 0.4%,
- Ti :
- 0.01 - 0.2%,
- B :
- 0.003 - 0.008%, and
- N :
- 0.05 - 0.3%,
- (2) A high-strength austenitic heat-resistant steel excellent in weldability and good in high-temperature corrosion resistance property according to paragraph (1) above further containing
- Mo :
- 0.5 - 2.0%.
- (3) A high-strength austenitic heat-resistant steel excellent in weldability and good in high-temperature corrosion resistance property according to paragraph (1) or (2) above further containing one or more of
- Mg :
- 0.001 - 0.05%,
- Ca :
- 0.001 - 0.05%, and
- Rare earth elements (REM) :
- 0.001 - 0.15%.
- Figure 1 is a graph showing the effect of Mo and W on the high-temperature corrosion resistance property of 20 Cr - 25 Ni steel.
- Figure 2 is a graph comparing the creep rupture strengths and high-temperature corrosion weight losses of invention steels and comparison steels.
- Figure 3 is a graph showing the results of Varestraint tests conducted on steels containing the main alloying elements other than C within the ranges of the invention and on SUS347H.
- The reasons for setting the ranges of the alloying elements in the invention in the foregoing manner will be explained.
- It is necessary to reduce C content as far as possible for preventing high-temperature cracking during welding and ductility degradation. Based on tests, the upper limit of C content was set as follows for securing good weldability. Figure 3 shows the results of an evaluation of weldability by Varestraint tests conducted on steels containing the main alloying elements other than C within the ranges of the invention (Cr : 20%, Ni : 25%, W : 3%) and having varied C content (■ in the drawing) and on SUS347H (corresponding to comparison steel K in the examples set out later; □ in the drawing). The conditions of the test were, test piece thickness : 5 mm, welding method : GTAW, welding voltage : 10 V, welding current : 80 A, welding velocity : 80 mm/min, and applied strain : 2%. Based on the tests results, and aiming at a content on a par with SUS347H, the upper limit of C content for securing good weldability is set at less than 0.02%.
- Si not only is effective as a deoxidizing agent but is also an element which improves oxidation resistance and high-temperature corrosion resistance property, but an excessive Si content reduces creep rupture strength, toughness and weldability. The upper limit is therefore set at 1.5%.
- Mn is an element which has deoxidizing activity and improves weldability and hot workability. For obtaining sufficient deoxidation and a sound ingot, the lower limit of Mn is set at 0.3%. Since an excessive Mn content degrades oxidation resistance, however, the upper limit is set to 1.5%.
- Cr is an indispensable element for oxidation resistance, water vapor oxidation resistance and high-temperature corrosion resistance property. For securing properties at least as good as prior art austenitic stainless steels, the lower limit of Cr content is set at 18%, which is the same as the Cr content of austenitic stainless steels. However, since increasing Cr content lowers the stability of the austenite and weakens the high-temperature strength and further promotes formation of an intermetallic compound σ phase and reduces toughness, the upper limit is set at 26%.
- Ni is an element required for increasing the stability of the austenite and suppressing formation of an intermetallic compound σ phase. An Ni content of not less than 20% is necessary for ensuring stability of the austenite against the content of Cr and other ferrite forming elements. On the other hand, since an Ni content exceeding 40% is disadvantageous from the aspect of price, the Ni content is set at 20 - 40%.
- Mo and W are both elements which markedly increase high-temperature strength as by entering solid solution. Neither has much effect when added at less than 0.5%, while addition of W at more than 10% leads to precipitation of intermetallic compounds such as Laves phase and reduces creep rupture ductility. When Mo is added alone, the high-temperature corrosion resistance property worsens as the Mo content increases. On the other hand, tests show that adding W alone does not degrade the high-temperature corrosion resistance property and that adding it in combination with Mo improves the high-temperature corrosion resistance property over that of a steel added with Mo alone. Therefore, W is always added, and the range thereof is set at 0.5 - 10%. As Mo in particular degrades the high-temperature corrosion resistance property when added in excess of 2.0%, even when added in combination with W, it is added, when required, at 0.5 - 2.0%.
- Nb and Ti markedly improve long-term creep rupture strength by forming minute carbo-nitrides. Since this effect is not obtained when the Nb content is less than 0.05% or the Ti content is less than 0.01%, the lower limits of Nb and Ti content are set at 0.05% and 0.01%. Although the aforesaid effect becomes more pronounced as the content of Nb and Ti soluble at the solid solution treatment temperature increases, adding Nb and Ti in excess of the solution limit degrades the creep rupture strength owing to the undissolved carbo-nitrides that remain. Therefore, the upper limits of Nb and Ti content are set at 0.4% and 0.2%, and for increasing the solid solution (Nb + Ti) content within these ranges, Nb and Ti are added in combination.
- B is an element which has the effect of enhancing intergranular strength and increasing creep rupture strength. However, since this effect is small at less than 0.003% and a content exceeding 0.008% degrades weldability and hot workability, the B content range is set at 0.003 - 0.008%.
- Since P markedly degrades weldability when added in a large amount, its upper limit is set at 0.02%.
- Since S segregates at the grain boundaries and degrades hot workability and also promotes intergranular brittleness during creep, its upper limit is set at 0.005%.
- N is an element which markedly improves creep rupture strength by solution strengthening and formation of nitrides. At a content of less than 0.05%, N cannot offset the loss of strength resulting from the reduction of C content for improving weldability, while addition at more than 0.3% produces little increase in long-term creep rupture strength but degrades toughness. Therefore, the N content range is set at 0.05 - 0.3%.
- While these elements purify the steel by deoxidation and desulfurization, thereby enhancing hot workability, for obtaining this effect it is necessary to add at least one of them at not less than 0.001%. However, since addition in excess of Mg : 0.05%, Ca : 0.05%, REM : 0.15% has the opposite effect of impairing hot workability, the respective addition ranges are set at Mg : 0.001 - 0.05%, Ca : 0.001 - 0.05%, REM : 0.001 - 0.15%.
- The invention will now be explained with reference to specific examples.
- Table 1 and Table 2 (continued from Table 1) show the chemical compositions and material properties of tested steel specimens. After solution treatment at 1250°C , these steels were subjected to creep rupture test at 700 and 750°C and to high-temperature corrosion test at 700°C . The creep rupture strength data was organized using the Larson-Miller method for estimating the 700°C x 100,000 h rupture strength. The high-temperature corrosion test was conducted by immersing the steel specimen in simulated coal-fired boiler ash of K₂SO₄ : Na₂SO₄ : Fe₂(SO₄)₃ = 0.28 : 0.2 : 0.5 (mass ratio) for 200 h and then measuring the corrosion weight loss. The test results are shown in Table 2.
- Among the steels shown in Tables 1 and 2, A - J are invention steels and K - U are comparison steels. Among the comparison steels, K corresponds to the widely used SUS347H. The invention steels have high-temperature strengths and high-temperature corrosion resistance properties that are very superior in comparison with the SUS347H steel. Among the comparison steels, L - O are examples having low high-temperature strength because they contain neither Mo or W and their Nb or B content is outside the range of the invention. P - U are examples with relatively high high-temperature strength but having poor high-temperature corrosion resistance property notwithstanding addition of Mo alone or in combination with W, owing to large Mo content.
- Figure 1 shows the effect of Mo and W on the high-temperature corrosion resistance property of 20 Cr - 25 Ni steel. While corrosion weight loss is large when Mo is added alone (● in the drawing), it will be noted that the high-temperature corrosion resistance property is improved when W is added in combination at 1.5% (▲ in the figure). It can further be seen that the corrosion weight loss does not change when W is added alone (□ in the figure).
- Figure 2 compares the creep rupture strengths and high-temperature corrosion weight losses of invention steels and comparison steels. It can be seen that the comparison steels are inferior in one or both of the high-temperature strength and the high-temperature corrosion resistance property, while the invention steels excel in both high-temperature strength and high-temperature corrosion resistance property.
- This invention enables realization of an austenitic heat-resistant steel that is excellent in weldability and secures high-temperature strength and high-temperature corrosion resistance property. It facilitates application of high-strength steel to high-temperature, high-pressure boilers and enables a reduction of implementation cost.
Claims (3)
- A high-strength austenitic heat-resistant steel excellent in weldability and good in high-temperature corrosion resistance property characterized in that it comprises, in mass percent,C : less than 0.02%,Si : not more than 1.5%,Mn : 0.3 - 1.5%,P : not more than 0.02%,S : not more than 0.005%,Cr : 18 - 26%,Ni : 20 - 40%,W : 0.5 - 10.0%,Nb : 0.05 - 0.4%,Ti : 0.01 - 0.2%,B : 0.003 - 0.008%, andN : 0.05 - 0.3%,the balance being Fe and unavoidable impurities.
- A high-strength austenitic heat-resistant steel excellent in weldability and good in high-temperature corrosion resistance property according to claim 1 further containingMo : 0.5 - 2.0%.
- A high-strength austenitic heat-resistant steel excellent in weldability and good in high-temperature corrosion resistance property according to claim 1 or 2 further containing one or more ofMg : 0.001 - 0.05%,Ca : 0.001 - 0.05%, andRare earth elements (REM) : 0.001 - 0.15%.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP111957/93 | 1993-05-13 | ||
JP5111957A JPH06322488A (en) | 1993-05-13 | 1993-05-13 | High-strength austenitic heat resistant steel excellent in weldability and satisfactory in high temperature corrosion resistance |
PCT/JP1994/000767 WO1994026947A1 (en) | 1993-05-13 | 1994-05-12 | High-strength austenitic heat-resisting steel with excellent weldability and good high-temperature corrosion resistance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0708184A1 true EP0708184A1 (en) | 1996-04-24 |
EP0708184A4 EP0708184A4 (en) | 1996-07-03 |
Family
ID=14574397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94914608A Withdrawn EP0708184A4 (en) | 1993-05-13 | 1994-05-12 | High-strength austenitic heat-resisting steel with excellent weldability and good high-temperature corrosion resistance |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0708184A4 (en) |
JP (1) | JPH06322488A (en) |
CA (1) | CA2162704A1 (en) |
WO (1) | WO1994026947A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1445342A1 (en) * | 2003-01-29 | 2004-08-11 | Sumitomo Metal Industries, Ltd. | Austenitic stainless steel and manufacturing method thereof |
US7815848B2 (en) * | 2006-05-08 | 2010-10-19 | Huntington Alloys Corporation | Corrosion resistant alloy and components made therefrom |
EP3100818A4 (en) * | 2014-01-27 | 2017-10-11 | Nippon Steel & Sumitomo Metal Corporation | Welding material for ni-based heat-resistant alloy, and welded metal and welded joint each using same |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2185624A1 (en) * | 1995-10-17 | 1997-04-18 | John H. Culling | Tough weldable heat resistant alloy |
CN100406608C (en) * | 2005-04-18 | 2008-07-30 | 张光华 | Ultra-strong refractory steel |
JP5670103B2 (en) * | 2010-06-15 | 2015-02-18 | 山陽特殊製鋼株式会社 | High strength austenitic heat resistant steel |
JP5661001B2 (en) * | 2011-08-23 | 2015-01-28 | 山陽特殊製鋼株式会社 | High strength austenitic heat resistant steel with excellent post-aging toughness |
JP5930635B2 (en) * | 2011-09-26 | 2016-06-08 | 山陽特殊製鋼株式会社 | Austenitic heat resistant steel having excellent high temperature strength and method for producing the same |
JP5273266B2 (en) * | 2012-02-08 | 2013-08-28 | 新日鐵住金株式会社 | Double pipe and welded structure using the same |
JP6955322B2 (en) * | 2016-03-15 | 2021-10-27 | 山陽特殊製鋼株式会社 | Austenitic heat-resistant steel with excellent workability, high-temperature strength and toughness after aging |
CN114032434B (en) * | 2021-10-27 | 2023-09-26 | 江苏金合特种合金材料有限公司 | Smelting of high corrosion resistant N08120 material and production process of large-caliber seamless pipe |
CN115505820B (en) * | 2022-09-15 | 2024-01-05 | 山西太钢不锈钢股份有限公司 | Continuous casting method of niobium-containing high-nitrogen nickel-based alloy |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6333549A (en) * | 1986-07-29 | 1988-02-13 | Nippon Kokan Kk <Nkk> | Austenitic steel tube for boiler having resistance to corrosion by coal ash and its manufacture |
JPS6411950A (en) * | 1987-07-03 | 1989-01-17 | Nippon Steel Corp | High-strength austenitic heat-resistant steel reduced in si content |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5681661A (en) * | 1979-12-06 | 1981-07-03 | Daido Steel Co Ltd | Heat resistant cast alloy |
JPS56105458A (en) * | 1980-01-25 | 1981-08-21 | Daido Steel Co Ltd | Heat-resistant cast alloy |
JPH0753898B2 (en) * | 1987-01-24 | 1995-06-07 | 新日本製鐵株式会社 | High strength austenitic heat resistant alloy |
-
1993
- 1993-05-13 JP JP5111957A patent/JPH06322488A/en not_active Withdrawn
-
1994
- 1994-05-12 CA CA 2162704 patent/CA2162704A1/en not_active Abandoned
- 1994-05-12 WO PCT/JP1994/000767 patent/WO1994026947A1/en not_active Application Discontinuation
- 1994-05-12 EP EP94914608A patent/EP0708184A4/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6333549A (en) * | 1986-07-29 | 1988-02-13 | Nippon Kokan Kk <Nkk> | Austenitic steel tube for boiler having resistance to corrosion by coal ash and its manufacture |
JPS6411950A (en) * | 1987-07-03 | 1989-01-17 | Nippon Steel Corp | High-strength austenitic heat-resistant steel reduced in si content |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 12, no. 242 (C-510), 8 July 1988 & JP-A-63 033549 (NIPPON KOKAN K.K.), 13 February 1988, * |
PATENT ABSTRACTS OF JAPAN vol. 13, no. 182 (C-591), 27 April 1989 & JP-A-01 011950 (NIPPON STEEL CORP.), 17 January 1989, * |
See also references of WO9426947A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1445342A1 (en) * | 2003-01-29 | 2004-08-11 | Sumitomo Metal Industries, Ltd. | Austenitic stainless steel and manufacturing method thereof |
US6939415B2 (en) | 2003-01-29 | 2005-09-06 | Sumitomo Metal Industries, Ltd. | Austenitic stainless steel and manufacturing method thereof |
US7815848B2 (en) * | 2006-05-08 | 2010-10-19 | Huntington Alloys Corporation | Corrosion resistant alloy and components made therefrom |
EP3100818A4 (en) * | 2014-01-27 | 2017-10-11 | Nippon Steel & Sumitomo Metal Corporation | Welding material for ni-based heat-resistant alloy, and welded metal and welded joint each using same |
Also Published As
Publication number | Publication date |
---|---|
EP0708184A4 (en) | 1996-07-03 |
WO1994026947A1 (en) | 1994-11-24 |
JPH06322488A (en) | 1994-11-22 |
CA2162704A1 (en) | 1994-11-24 |
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