A249 TP309Cb_全球钢材百科网钢材化学成分-热处理-物理性能介绍-全球钢材百科网

A249 TP309Cb简介

牌号	A249 TP309Cb
美国UNS	S30940
对应标准	ASTM A249/A249M-2018 焊接奥氏体钢锅炉、过热器、热交换器和冷凝器管 Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
归类	奥氏体不锈钢

A249 TP309Cb 化学元素成分含量(%)

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	Nb(Cb)：10C~1.10

碳当量计算

A249 TP309Cb 机械性能

热处理或状态	抗拉强度 σ_b Mpa	屈服点 σ_s Mpa	断后伸长率或延伸率 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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