A stainless steel alloy comprising essentially of 19 to 22 percent by weight chromium, 8.5 to 10.5 percent by weight nickel, 5.25 to 5.75 percent by weight silicon, 0.25 to 2.0 percent by weight carbon, 4.0 to 10.5 percent by weight molybdenum, 0.3 to 0.5 percent by weight titanium, 0.1 to 0.5 by we
A stainless steel alloy comprising essentially of 19 to 22 percent by weight chromium, 8.5 to 10.5 percent by weight nickel, 5.25 to 5.75 percent by weight silicon, 0.25 to 2.0 percent by weight carbon, 4.0 to 10.5 percent by weight molybdenum, 0.3 to 0.5 percent by weight titanium, 0.1 to 0.5 by weight percent nitrogen and the balance iron plus impurities. The impurities may consist of 0 to 0.2 percent by weight cobalt, 0 to 0.5 percent by weight manganese, 0 to 0.3 percent by weight molybdenum, 0 to 0.03 percent by weight phosphor, 0 to 0.03 percent by weight sulphur, 0 to 0.1 percent by weight nitrogen.
대표청구항▼
1. An alloy consisting essentially of 19 to 22 wt % chromium, 8.5 to 10.5 wt % nickel, 5.25 to 6.0 wt % silicon, 0.25 to 2.0 wt % carbon, 4.0 to 10.5 wt % of a carbide former selected from the group consisting of molybdenum, tantalum, tungsten, zirconium, and vanadium, 0.3 to 0.5 wt % titanium, 0.1
1. An alloy consisting essentially of 19 to 22 wt % chromium, 8.5 to 10.5 wt % nickel, 5.25 to 6.0 wt % silicon, 0.25 to 2.0 wt % carbon, 4.0 to 10.5 wt % of a carbide former selected from the group consisting of molybdenum, tantalum, tungsten, zirconium, and vanadium, 0.3 to 0.5 wt % titanium, 0.1 to 0.5 wt % nitrogen, and the balance being iron plus impurities. 2. The alloy according to claim 1, wherein the impurities consist of 0 to 0.2 wt % cobalt, 0 to 0.3 wt % molybdenum, 0 to 0.03 wt % phosphor, and 0 to 0.03 wt % sulphur, and 0 to 0.1 wt % nitrogen. 3. The alloy according to claim 1, wherein the carbide former is tantalum, and tantalum is 4.0 to 9.0 wt %. 4. The alloy according to claim 3, wherein the impurities consist of 0 to 0.2 wt % cobalt, 0 to 0.5 wt % manganese, 0 to 0.3 wt % molybdenum, 0 to 0.03 wt % phosphor, 0 to 0.03 wt % sulphur, and 0 to 0.1 wt % nitrogen. 5. The alloy according to claim 1, wherein the carbide former is tantalum, nickel is 8.5 to 9.5 wt %, silicon is 5.25 to 5.75 wt %, carbon is 0.8 to 1.2 wt %, and tantalum is 4.0 to 6.0 wt %. 6. The alloy according to claim 1, wherein the carbide former is tungsten, and tungsten is 4.0 to 9.0 wt %. 7. The alloy according to claim 6, wherein nickel is 8.5 to 9.5 wt %, silicon is 5.25 to 5.75 wt %, carbon is 0.8 to 1.2 wt %, and tungsten is 4.0 to 6.0 wt %. 8. The alloy according to claim 6, wherein the impurities consist of 0 to 0.2 wt % cobalt, 0 to 0.5 wt % manganese, 0 to 0.3 wt % molybdenum, 0 to 0.03 wt % phosphor, 0 to 0.03 wt % sulphur, and 0 to 0.1 wt % nitrogen. 9. The alloy according to claim 1, wherein the carbide former is zirconium, and zirconium is 4.0 to 9.0 wt %. 10. The alloy according to claim 9, wherein nickel is 8.5 to 9.5 wt %, silicon is 5.25 to 5.75 wt %, carbon is 0.8 to 1.2 wt %, and zirconium is 4.0 to 6.0 wt %. 11. The alloy according to claim 9, wherein the impurities consist of 0 to 0.2 wt % cobalt, 0 to 0.5 wt % manganese, 0 to 0.3 wt % molybdenum, 0 to 0.03 wt % phosphor, 0 to 0.03 wt % sulphur, and 0 to 0.1 wt % nitrogen. 12. The alloy according to claim 1, wherein the carbide former is vanadium, and vanadium is 4.0 to 9.0 wt %. 13. The alloy according to claim 12, wherein nickel is 8.5 to 9.5 wt %, silicon is 5.25 to 5.75 wt %, carbon is 0.8 to 1.2 wt %, and vanadium is 4.0 to 6.0 wt %. 14. The alloy according to claim 12, wherein the impurities consist of 0 to 0.2 wt % cobalt, 0 to 0.5 wt % manganese, 0 to 0.3 wt % molybdenum, 0 to 0.03 wt % phosphor, 0 to 0.03 wt % sulphur, and 0 to 0.1 wt % nitrogen. 15. An article comprising an alloy as claimed in claim 1. 16. The alloy according to claim 1, wherein the alloy excludes niobium. 17. An alloy consisting essentially of 19 to 22 wt % chromium, 8.5 to 10.5 wt % nickel, 5.25 to 5.75 wt % silicon, 0.25 to 2.0 wt % carbon, 4.0 to 10.5 wt % molybdenum, 0.3 to 0.5 wt % titanium, 0.1 to 0.5 wt % nitrogen, and the balance being iron plus impurities. 18. The alloy according to claim 17, wherein carbon is 0.8 to 1.2 wt %, and molybdenum is 4.0 to 6.0 wt %. 19. The alloy according to claim 17, wherein carbon is 1.7 to 2.0 wt %, and molybdenum is 8.5 to 10.5 wt %. 20. The alloy according to claim 17, wherein the alloy excludes niobium.
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