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A217 grade C12A

thread177-70606

A217 grade C12A

A217 grade C12A

(OP)
I need the chemical makeup of this new chrome moly alloy. It is not listed in our set of ASTM info. We are trying to compare it to grade P91
Regards
Tim Holmes
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RE: A217 grade C12A

A217 C12A is the cast version of P91 alloy.
It is UNS # J84090.  I believe it is also included in ASME Section IX per the coming 2003 addenda.
Chemical composition per ASTM is
.08-.12 C
.30-.60 Mn
.03 max P
.01 max S
.20-.50 Si
.40 max Ni
8.0-9.5 Cr
.85-1.05 Mo
.060-.10 Cb
.030-.070 N
.040 max Al
.18-.25 V

90-115 ksi tensile
60 ksi min yield
18 elong
45 ROA

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