美國UNS S31655
對應标準 ASTM A249/A249M-2018
焊接奧氏體鋼鍋爐、過熱器、熱交換器和冷凝器管
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
歸類 奧氏體不鏽鋼
化學元素成分含量(%)
成分 C Si Mn P S Cr Ni Cu Mo N
最小值 - - - - - 19.5 8 - 0.5 0.14
最大值 0.03 1 2 0.045 0.015 21.5 9.5 1 1.5 0.25
注:For small diameter or thin walls. or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in Grades TP316L. Small outside diameter tubes are defined as those less than 0.500 inch [12.7 mm] in outside diameter and light wall are those less than 0.049 inch [1.2 mm] in minimum wall thickness.
機械性能
熱處理或狀态
抗拉強度
σb
Mpa
屈服點
σs
Mpa
斷後伸長率或延伸率
δ
%
硬度
HBW
Solutioning Temperature 1040℃ ≥635 ≥310 ≥35 HRB
≤100
注:Quenched in water or rapidly cooled by other methods, at a rate sufficient to prevent reprecipitation of chromium carbides, as demonstrated by the capability of passing Practices A262, Practice E. The manufacturer is not required to run the test unless it is specified on the purchase order (See Supplementary Requirement S6). Note that Practices A262 requires the test to be performed on sensitized specimens in the low carbon and stabilized types and on specimens representative of the as-shipped condition of the other types. In the case of low-carbon types containing 3 % or more molybdenum, the applicability of the sensitizing treatment prior to testing shall be a matter for negotiation between the seller and purchaser.
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