Stainless steel and pipe made thereof
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United States of America Patent
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app pub date -
Dec 18, 2017
filing date -
Mar 28, 2016
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Disclosed are a stainless steel having a new composition, which has properties of low strength as compared with a conventional stainless steel, that includes, percent by weight, C: 0.03% or less, Si: exceeding 0 to 1.7% or less, Mn: 1.5 to 3.5%, Cr: 15.0 to 18.0%, Ni: 7.0 to 9.0%, Cu: 1.0 to 4.0%, Mo: 0.03% or less, P: 0.04% or less, S: 0.04% or less, N: 0.03% or less, residue: Fe, and incidental impurities, and has an austenite matrix structure and an average diameter of 30 to 60 μm, and a system such as an air conditioner including the stainless steel thereof.
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