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A249 TP309Cb簡(jiǎn)介

牌號(hào) A249 TP309Cb
美國(guó)UNS S30940
對(duì)應(yīng)標(biāo)準(zhǔn) ASTM A249/A249M-2018
焊接奧氏體鋼鍋爐、過(guò)熱器、熱交換器和冷凝器管
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
歸類(lèi) 奧氏體不銹鋼
A249 TP309Cb 化學(xué)元素成分含量(%)
成分 C Si Mn P S Cr Ni 更多
最小值 - - - - - 22 12 Nb(Cb)：10C~1.10
最大值 0.08 1 2 0.045 0.03 24 16
碳當(dāng)量計(jì)算
A249 TP309Cb 機(jī)械性能
熱處理或狀態(tài)
抗拉強(qiáng)度
σb
Mpa 		屈服點(diǎn)
σs
Mpa 		斷后伸長(zhǎng)率或延伸率
δ
% 		硬度
HBW
Solutioning Temperature 1040℃ ≥515 ≥205 ≥35 HRB
≤90
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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