US20040079451A1 - Low nickel containing chromium-nickel-maganese-copper austenitic stainless steel - Google Patents
Low nickel containing chromium-nickel-maganese-copper austenitic stainless steel Download PDFInfo
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- US20040079451A1 US20040079451A1 US10/353,167 US35316703A US2004079451A1 US 20040079451 A1 US20040079451 A1 US 20040079451A1 US 35316703 A US35316703 A US 35316703A US 2004079451 A1 US2004079451 A1 US 2004079451A1
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- stainless steel
- austenitic stainless
- nickel
- containing chromium
- maganese
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Definitions
- This invention relates to an austenitic stainless steel, more particularly to a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel.
- U.S. Pat. No. 5,286,310 discloses a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel that has a reduced nickel content and acceptable metallographic structure, mechanical strength, corrosion resistance and workability.
- the aforesaid austenitic stainless steel contains at least 16.5% by weight of chromium so as to provide acceptable corrosion resistance. However, the chromium content should not exceed 17.5% by weight so as to prevent undesired formation of delta ferrite ( ⁇ -ferrite) during hot working and impairment to hot workability.
- the aforesaid austenitic stainless steel further contains at least 2.5% by weight of nickel so as to improve cold workability and so as to inhibit transformation of austenite into martensite. However, nickel content should not exceed 5% by weight due to the relatively high price thereof.
- the aforesaid austenitic stainless steel is capable of providing acceptable corrosion resistance and cold or hot workability, the chromium content thereof is still high (previous investigation has shown that at least 17% by weight of chromium is necessary to provide minimum levels of corrosion resistance), which can impair stability of the austenitic stainless steel and which can cause cracking during hot rolling.
- an austenitic stainless steel that comprises: (a) 0.03 wt % to 0.12 wt % of C; (b) 0.2 wt % to 1.0 wt % of Si; (c) 7.5 wt % to 10.5 wt % of Mn; (d) 14.0 wt % to 16.0 wt % of Cr; (e) 1.0 wt % to 5.0 wt % of Ni; (f) 0.04 wt % to 0.25 wt % of N; (g) 1.0 wt % to 3.5 wt % of Cu; (h) trace amount of Mo; and the balance being Fe and incidental impurities.
- the austenitic stainless steel has a ⁇ -ferrite content that is less than 8.5 and that satisfies the following formula
- ⁇ -ferrite 6.77[( d )+( h )+1.5( b )] ⁇ 4.85[( e )+30( a )+30( f )+0.5( c )+0.3( g )] ⁇ 52.75.
- FIG. 1 is a diagram illustrating the relationship between ⁇ -ferrite content of the preferred embodiment of the austenitic stainless steel of this invention and hot working temperature.
- the preferred embodiment of the low nickel containing chromium-nickel-manganese-copper austenitic stainless steel of the present invention comprises: (a) 0.03 wt % to 0.12 wt % of C; (b) 0.2 wt % to 1.0 wt % of Si; (c) 7.5 wt % to 10.5 wt % of Mn; (d) 14.0 wt % to 16.0 wt % of Cr; (e) 1.0 wt % to 5.0 wt % of Ni; (f) 0.04 wt % to 0.25 wt % of N; (g) 1.0 wt % to 3.5 wt % of Cu; (h) trace amount of Mo; and the balance being Fe and incidental impurities.
- the austenitic stainless steel has a ⁇ -ferrite content that is less than 8.5 and that satisfies the following formula
- ⁇ -ferrite 6.77[( d )+( h )+1.5( b )] ⁇ 4.85[( e )+30( a )+30( f )+0.5( c )+0.3( g )] ⁇ 52.75,
- the austenitic stainless steel can further comprise 5 to 30 ppm of B so as to improve hot workability.
- the contents of harmful impurities, such as S (sulfur) and P (phosphorous), are as small as possible.
- S (sulfur) and P (phosphorous) are as small as possible.
- the S content is limited to 150 ppm
- the P content is limited to 0.06 wt %.
- FIG. 1 illustrates the relationship between the ⁇ -ferrite content of the preferred embodiment of the austenitic stainless steel of this invention and temperature. The results show that when temperature is raised to above 1250° C. during hot rolling, the ⁇ -ferrite content rises sharply, which results in the risk of edge cracking of a rolled plate of the austenitic stainless steel. In addition, a minimum temperature of 1050° C. during hot rolling is required so as to obtain the requisite mechanical strength.
- Table 1 illustrates an edge crack effect test for different test specimens of the austenitic stainless steel of Examples 1 to 9 and comparative Examples 1 to 5, which differ in composition (only elements Ni, C, Si, Mn, Cr, and Cu are shown).
- the test was conducted by hot rolling at a temperature ranging from 1050° C. to 1250° C.
- the test results show that each Example of the austenitic stainless steel of is invention has a ⁇ -ferrite content less than 8.5, and that no edge crack was observed for the test specimens of Examples 1 to 9.
- Each of the test specimens of the Comparative Examples 1 to 5 has a ⁇ -ferrite content greater than 8.5. Edge cracks were found in each of the test specimens of the Comparative Examples 1 to 5.
- Table 2 illustrates a corrosion resistance test (ASTM B117) using salt fog for different test specimens of the austenitic stainless steel of Examples 10 to 12 and comparative Example 6 (type 304 stainless steel), which differ in composition (only elements Ni, C, Si, Mn, Cr, Cu, and B are shown)
- the test results show that each Example of the austenitic stainless steel of this invention has a corrosion rate that is as low as that of the type 304 stainless steel (no more than 0.1%) of the prior art.
- the chromium content in each of the Examples 1 to 12 of the austenitic stainless steel of this invention is less than 17 wt %, which is a minimum requirement of the prior art for providing minimum levels of corrosion resistance.
- Table 3 illustrates compositions of test specimens of the austenitic stainless steel of Examples 13 to 22 and comparative Examples 7 to 10 (only elements Ni, C, Si, Mn, Cr, and Cu are shown).
- Table 4 illustrates a mechanical strength test for the test specimens of the austenitic stainless steel of the Examples 13 to 22 and the comparative Examples 7 to 10. The test results show that the austenitic stainless steel of this invention has an elongation better than those of type 304 stainless steel of the prior art. Other mechanical properties, such as tensile strength, yield strength, and hardness, of the austenitic stainless steel of this invention are comparable to those of type 304 stainless steel of the prior art.
- the austenitic stainless steel of this invention is capable of exhibiting excellent mechanical strength, corrosion resistance, and phase stability during hot or cold working with a relatively low nickel content and a low chromium content as compared to those of the prior art.
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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)
- Heat Treatment Of Sheet Steel (AREA)
- Hard Magnetic Materials (AREA)
Abstract
An austenitic stainless steel includes (a) 0.03 wt % to 0.12 wt % of C, (b) 0.2 wt % to 1.0 wt % of Si, (c) 7.5 wt % to 10.5 wt % of Mn, (d) 14.0 wt % to 16.0 wt % of Cr, (e) 1.0 wt % to 5.0 wt % of Ni, (f) 0.04 wt % to 0.25 wt % of N, (g) 1.0 wt % to 3.5 wt % of Cu, (h) trace amount of Mo, and the balance being Fe and incidental impurities. The austenitic stainless steel has a δ-ferrite content less than 8.5 and equal to 6.77[(d)+(h)+1.5(b)]−4.85[(e)+30(a)+30(f)+0.5(c)+0.3(g)]−52.75.
Description
- This application claims priority of Taiwanese patent Application No. 091124567, filed on Oct. 23, 2002.
- 1. Field of the Invention
- This invention relates to an austenitic stainless steel, more particularly to a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel.
- 2. Description of the Related Art
- U.S. Pat. No. 5,286,310 discloses a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel that has a reduced nickel content and acceptable metallographic structure, mechanical strength, corrosion resistance and workability. The aforesaid austenitic stainless steel contains at least 16.5% by weight of chromium so as to provide acceptable corrosion resistance. However, the chromium content should not exceed 17.5% by weight so as to prevent undesired formation of delta ferrite (δ-ferrite) during hot working and impairment to hot workability. The aforesaid austenitic stainless steel further contains at least 2.5% by weight of nickel so as to improve cold workability and so as to inhibit transformation of austenite into martensite. However, nickel content should not exceed 5% by weight due to the relatively high price thereof.
- Although the aforesaid austenitic stainless steel is capable of providing acceptable corrosion resistance and cold or hot workability, the chromium content thereof is still high (previous investigation has shown that at least 17% by weight of chromium is necessary to provide minimum levels of corrosion resistance), which can impair stability of the austenitic stainless steel and which can cause cracking during hot rolling.
- The disclosure of U.S. Pat. No. 5,286,310 is incorporated herein by reference.
- Therefore, it is an object of the present invention to provide a low nickel containing chromium-nickel-manganese-copper austenitic stainless steel that is capable of overcoming the aforesaid drawbacks of the prior art.
- According to this invention, there is provided an austenitic stainless steel that comprises: (a) 0.03 wt % to 0.12 wt % of C; (b) 0.2 wt % to 1.0 wt % of Si; (c) 7.5 wt % to 10.5 wt % of Mn; (d) 14.0 wt % to 16.0 wt % of Cr; (e) 1.0 wt % to 5.0 wt % of Ni; (f) 0.04 wt % to 0.25 wt % of N; (g) 1.0 wt % to 3.5 wt % of Cu; (h) trace amount of Mo; and the balance being Fe and incidental impurities. The austenitic stainless steel has a δ-ferrite content that is less than 8.5 and that satisfies the following formula
- δ-ferrite=6.77[(d)+(h)+1.5(b)]−4.85[(e)+30(a)+30(f)+0.5(c)+0.3(g)]−52.75.
- In drawing which illustrates an embodiment of the invention,
- FIG. 1 is a diagram illustrating the relationship between δ-ferrite content of the preferred embodiment of the austenitic stainless steel of this invention and hot working temperature.
- The preferred embodiment of the low nickel containing chromium-nickel-manganese-copper austenitic stainless steel of the present invention comprises: (a) 0.03 wt % to 0.12 wt % of C; (b) 0.2 wt % to 1.0 wt % of Si; (c) 7.5 wt % to 10.5 wt % of Mn; (d) 14.0 wt % to 16.0 wt % of Cr; (e) 1.0 wt % to 5.0 wt % of Ni; (f) 0.04 wt % to 0.25 wt % of N; (g) 1.0 wt % to 3.5 wt % of Cu; (h) trace amount of Mo; and the balance being Fe and incidental impurities. The austenitic stainless steel has a δ-ferrite content that is less than 8.5 and that satisfies the following formula
- δ-ferrite=6.77[(d)+(h)+1.5(b)]−4.85[(e)+30(a)+30(f)+0.5(c)+0.3(g)]−52.75,
- wherein (a) , (b) , (c) , (d), (e) , (f), (g) , (h) in the formula mean the content of the respective elements (wt %)
- The austenitic stainless steel can further comprise 5 to 30 ppm of B so as to improve hot workability. The contents of harmful impurities, such as S (sulfur) and P (phosphorous), are as small as possible. However, due to cost concerns associated with removal of these impurities, the S content is limited to 150 ppm, and the P content is limited to 0.06 wt %.
- FIG. 1 illustrates the relationship between the δ-ferrite content of the preferred embodiment of the austenitic stainless steel of this invention and temperature. The results show that when temperature is raised to above 1250° C. during hot rolling, the δ-ferrite content rises sharply, which results in the risk of edge cracking of a rolled plate of the austenitic stainless steel. In addition, a minimum temperature of 1050° C. during hot rolling is required so as to obtain the requisite mechanical strength.
- The following Examples and Comparative Examples illustrate the unexpectedly better results of this invention over the prior art.
- Table 1 illustrates an edge crack effect test for different test specimens of the austenitic stainless steel of Examples 1 to 9 and comparative Examples 1 to 5, which differ in composition (only elements Ni, C, Si, Mn, Cr, and Cu are shown). The test was conducted by hot rolling at a temperature ranging from 1050° C. to 1250° C. The test results show that each Example of the austenitic stainless steel of is invention has a δ-ferrite content less than 8.5, and that no edge crack was observed for the test specimens of Examples 1 to 9. Each of the test specimens of the Comparative Examples 1 to 5 has a δ-ferrite content greater than 8.5. Edge cracks were found in each of the test specimens of the Comparative Examples 1 to 5.
TABLE 1 Edge Ni C Si Mn Cr Cu δ-ferrite crack Exam- ples 1 4.31 0.053 0.50 7.60 16.30 1.60 8.49 None 2 4.05 0.032 0.53 7.85 15.36 1.71 6.636 None 3 4.07 0.032 0.54 8.00 15.33 1.66 6.259 Noen 4 4.55 0.032 0.58 7.54 15.23 1.59 4.984 None 5 4.15 0.059 0.62 7.44 15.26 1.65 3.859 None 6 4.24 0.046 0.42 7.86 15.68 1.66 3.278 None 7 4.21 0.051 0.49 7.63 15.16 1.62 1.684 None 8 4.09 0.060 0.50 8.08 15.14 1.70 0.109 None 9 4.19 0.066 0.54 7.76 14.99 1.65 −1.989 None Com- para- tive Exam- ples 1 4.31 0.039 0.47 7.07 19.04 2.15 28.58 Cracking 2 4.36 0.05 0.45 7.58 17.53 2.03 15.82 Cracking 3 4.37 0.046 0.47 7.96 18.33 1.71 22.60 Cracking 4 4.77 0.052 0.51 7.54 18.13 1.73 19.85 Cracking 5 4.45 0.051 0.53 7.5 16.20 1.5 9.1 cracking - Table 2 illustrates a corrosion resistance test (ASTM B117) using salt fog for different test specimens of the austenitic stainless steel of Examples 10 to 12 and comparative Example 6 (type 304 stainless steel), which differ in composition (only elements Ni, C, Si, Mn, Cr, Cu, and B are shown) The test results show that each Example of the austenitic stainless steel of this invention has a corrosion rate that is as low as that of the type 304 stainless steel (no more than 0.1%) of the prior art.
TABLE 2 Corrosion Ni C Si Mn Cr Cu B rate Exam- ples 10 4.40 0.058 0.48 7.56 15.26 1.79 0.0001 ≦0.1 wt % 11 4.11 0.051 0.54 7.86 15.35 1.69 0.0032 ≦0.1 wt % 12 3.40 0.059 0.77 7.84 14.94 1.78 0.0001 ≦0.1 wt % Com- para- tive Exam- ple 6 8.02 0.045 0.53 1.25 18.19 0.23 0.0008 ≦0.1 wt % - It is noted that the chromium content in each of the Examples 1 to 12 of the austenitic stainless steel of this invention is less than 17 wt %, which is a minimum requirement of the prior art for providing minimum levels of corrosion resistance.
- Table 3 illustrates compositions of test specimens of the austenitic stainless steel of Examples 13 to 22 and comparative Examples 7 to 10 (only elements Ni, C, Si, Mn, Cr, and Cu are shown). Table 4 illustrates a mechanical strength test for the test specimens of the austenitic stainless steel of the Examples 13 to 22 and the comparative Examples 7 to 10. The test results show that the austenitic stainless steel of this invention has an elongation better than those of type 304 stainless steel of the prior art. Other mechanical properties, such as tensile strength, yield strength, and hardness, of the austenitic stainless steel of this invention are comparable to those of type 304 stainless steel of the prior art.
TABLE 3 Ni C Si Mn Cr Cu Examples 13 4.26 0.036 0.56 7.7 15.12 1.67 14 4.21 0.039 0.47 7.97 15.32 1.66 15 4.21 0.056 0.54 7.69 15.26 1.79 16 4.15 0.049 0.48 7.7 15.26 1.66 17 4.20 0.040 0.49 7.93 15.35 1.67 18 4.21 0.039 0.48 7.96 15.29 1.66 19 4.22 0.044 0.46 7.93 15.01 1.70 20 4.17 0.064 0.5 7.71 15.16 1.65 21 4.20 0.055 0.52 7.70 15.32 1.68 22 4.41 0.058 0.48 7.56 15.27 1.80 Comparative Example 7 8.06 0.039 0.53 1.17 18.14 0.23 8 8.04 0.041 0.50 1.15 18.15 0.21 9 8.08 0.039 0.49 1.18 18.17 0.24 10 8.03 0.040 0.52 1.11 18.09 0.22 -
TABLE 4 Tensile Yield Elonga- strength, strength, Hardness, tion, Examples (MPa) (MPa) (HRBO) (%) 13 621.7 313.3 83.5 55.2 14 630.2 289.5 82.5 55.3 15 628.5 287.6 82.3 55.0 16 642.3 291.3 82.8 53.1 17 618.4 312.0 84.3 53.7 18 634.6 296.4 82.8 53.8 19 639.0 317.2 83.9 54.1 20 642.6 319.7 84.7 54.3 21 621.7 313.3 83.5 55.2 22 641.9 301.6 83.4 53.4 Compara- Tensile Yield Elonga- tive strength, strength, Hardness, tion, Examples (MPa) (MPa) (HRBO) (%) 7 660.0 324.6 83.2 49.1 8 660.6 325.0 82.6 46.8 9 663.8 328.9 82.4 48.8 10 657.8 322.8 81.8 48.5 - The aforesaid tests show that the austenitic stainless steel of this invention is capable of exhibiting excellent mechanical strength, corrosion resistance, and phase stability during hot or cold working with a relatively low nickel content and a low chromium content as compared to those of the prior art.
- With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the spirit of the present invention.
Claims (4)
1. An austenitic stainless steel comprising:
(a) 0.03 wt % to 0.12 wt % of C;
(b) 0.2 wt % to 1.0 wt % of Si;
(c) 7.5 wt % to 10.5 wt % of Mn;
(d) 14.0 wt % to 16.0 wt % of Cr;
(e) 1.0 wt % to 5.0 wt % of Ni;
(f) 0.04 wt % to 0.25 wt % of N;
(g) 1.0 wt % to 3.5 wt % of Cu;
(h) trace amount of Mo; and
the balance being Fe and incidental impurities;
wherein said austenitic stainless steel has a δ-ferrite content that is less than 8.5 and that satisfies the following formula
δ-ferrite=6.77[(d)+(h)+1.5(b)]−4.85[(e)+30(a)+30(f)+0.5(c)+0.3(g)]−52.75.
2. The austenitic stainless steel of claim 1 , further comprising 5 to 30 ppm of B.
3. The austenitic stainless steel of claim 1 , further comprising no more than 150 ppm of S.
4. The austenitic stainless steel of claim 1 , further comprising no more than 0.06 wt % of P.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/993,674 US20050103404A1 (en) | 2003-01-28 | 2004-11-19 | Low nickel containing chromim-nickel-mananese-copper austenitic stainless steel |
US11/866,869 US7780908B2 (en) | 2002-10-23 | 2007-10-03 | Low nickel containing chromium-nickel-manganese- copper austenitic stainless steel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW091124567 | 2002-10-23 | ||
TW091124567A TWI247813B (en) | 2002-10-23 | 2002-10-23 | Austenite stainless steel with low nickel content |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/993,674 Continuation-In-Part US20050103404A1 (en) | 2002-10-23 | 2004-11-19 | Low nickel containing chromim-nickel-mananese-copper austenitic stainless steel |
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US20040079451A1 true US20040079451A1 (en) | 2004-04-29 |
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US10/353,167 Abandoned US20040079451A1 (en) | 2002-10-23 | 2003-01-28 | Low nickel containing chromium-nickel-maganese-copper austenitic stainless steel |
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US (1) | US20040079451A1 (en) |
JP (1) | JP2004143576A (en) |
KR (1) | KR100552545B1 (en) |
BR (1) | BR0300296A (en) |
MY (1) | MY135980A (en) |
TW (1) | TWI247813B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100354447C (en) * | 2004-05-28 | 2007-12-12 | 烨联钢铁股份有限公司 | Corrosion-resistant and antibacterial low-nickel austenitic stainless steel |
CN101435056B (en) * | 2008-11-27 | 2010-12-22 | 江苏利达不锈钢有限公司 | Novel low-cost free-cutting stainless steel 303C and manufacturing process thereof |
US8540933B2 (en) | 2009-01-30 | 2013-09-24 | Sandvik Intellectual Property Ab | Stainless austenitic low Ni steel alloy |
US20170016702A1 (en) * | 2015-07-17 | 2017-01-19 | Benteler Steel/Tube Gmbh | Gas generator |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5977609B2 (en) * | 2012-07-20 | 2016-08-24 | 日新製鋼株式会社 | Saving Ni-type austenitic stainless steel |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5286310A (en) * | 1992-10-13 | 1994-02-15 | Allegheny Ludlum Corporation | Low nickel, copper containing chromium-nickel-manganese-copper-nitrogen austenitic stainless steel |
US6056917A (en) * | 1997-07-29 | 2000-05-02 | Usinor | Austenitic stainless steel having a very low nickel content |
US6274084B1 (en) * | 1998-07-02 | 2001-08-14 | Ugine Sa | Corrosion-resistant low-nickel austenitic stainless steel |
-
2002
- 2002-10-23 TW TW091124567A patent/TWI247813B/en not_active IP Right Cessation
- 2002-12-17 JP JP2002365622A patent/JP2004143576A/en active Pending
-
2003
- 2003-01-28 US US10/353,167 patent/US20040079451A1/en not_active Abandoned
- 2003-02-06 KR KR1020030007545A patent/KR100552545B1/en active IP Right Grant
- 2003-02-07 BR BR0300296-9A patent/BR0300296A/en not_active IP Right Cessation
- 2003-02-07 MY MYPI20030420A patent/MY135980A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5286310A (en) * | 1992-10-13 | 1994-02-15 | Allegheny Ludlum Corporation | Low nickel, copper containing chromium-nickel-manganese-copper-nitrogen austenitic stainless steel |
US6056917A (en) * | 1997-07-29 | 2000-05-02 | Usinor | Austenitic stainless steel having a very low nickel content |
US6274084B1 (en) * | 1998-07-02 | 2001-08-14 | Ugine Sa | Corrosion-resistant low-nickel austenitic stainless steel |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100354447C (en) * | 2004-05-28 | 2007-12-12 | 烨联钢铁股份有限公司 | Corrosion-resistant and antibacterial low-nickel austenitic stainless steel |
CN101435056B (en) * | 2008-11-27 | 2010-12-22 | 江苏利达不锈钢有限公司 | Novel low-cost free-cutting stainless steel 303C and manufacturing process thereof |
US8540933B2 (en) | 2009-01-30 | 2013-09-24 | Sandvik Intellectual Property Ab | Stainless austenitic low Ni steel alloy |
US20170016702A1 (en) * | 2015-07-17 | 2017-01-19 | Benteler Steel/Tube Gmbh | Gas generator |
Also Published As
Publication number | Publication date |
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KR20040036511A (en) | 2004-04-30 |
BR0300296A (en) | 2004-08-03 |
MY135980A (en) | 2008-07-31 |
TWI247813B (en) | 2006-01-21 |
KR100552545B1 (en) | 2006-02-14 |
JP2004143576A (en) | 2004-05-20 |
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Owner name: YIEH UNITED STEEL CORP., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HSIEH, MENG-HSIN;WU, YI-CHENG;HUANG, PEI-TE;AND OTHERS;REEL/FRAME:013719/0362 Effective date: 20030117 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |