| 摘要 |
<p>An austenitic Fe-Ni-Cr alloy comprises C: 0.005ˆ¼0.03 mass%, Si: 0.15ˆ¼1.0 mass%, Mn: not more than 2.0 mass%, P: not more than 0.030 mass%, S: not more than 0.002 mass%, Cr: 18ˆ¼28 mass%, Ni: 20ˆ¼38 mass%, Mo: 0.10ˆ¼3 mass%, Co: 0.05ˆ¼2.0 mass%, Cu: less than 0.25 mass%, N: not more than 0.02 mass%, provided that PRE = Cr+3.3xMo+16xN ‰¥ 20.0 and PREH = 411-13.2xCr-5.8xMo+0.1xMo 2 +1.2xCu ‰¤ 145.0 (wherein each element symbol represents a content (mass%) of each element) and has an excellent corrosion resistance in air or under a wet environment even at a surface state having an oxide film formed by a intermediate heat treatment on the way of the production process.</p> |
