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A249 TPXM-19簡介

牌號 A249 TPXM-19
美國UNS S20910
對應標準 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 奧氏體不銹鋼
A249 TPXM-19 化學元素成分含量(%)
成分 C Si Mn P S Cr Ni Mo N V Nb
最小值 - - 4 - - 20.5 11.5 1.5 0.2 0.1 0.1
最大值 0.06 1 6 0.045 0.03 23.5 13.5 3 0.4 0.3 0.3
碳當量計算
A249 TPXM-19 機械性能
熱處理或狀態(tài)
抗拉強度
σb
Mpa 		屈服點
σs
Mpa 		斷后伸長率或延伸率
δ
% 		硬度
HBW
Solutioning Temperature 1040℃ ≥690 ≥380 ≥35 HRC
≤25
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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