ASTM A335 / A335M - 11 Standard Specification for Seamless Ferritic Alloy Steel Pipe for High-Temperature Service
Chemical Requirements
|
Grade |
UNS Designation |
Composition(%) |
||||||
|
C |
Mn |
P |
S |
Si |
Cr |
Mo |
||
|
P1 |
K11522 |
0.10–0.20 |
0.30–0.80 |
0.025 |
0.025 |
0.10–0.50 |
_ |
0.44–0.65 |
|
P2 |
K11547 |
0.10–0.20 |
0.30–0.61 |
0.025 |
0.025 |
0.10–0.30 |
0.50–0.81 |
0.44–0.65 |
|
P5 |
K41545 |
0.15 max |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
4.00–6.00 |
0.45–0.65 |
|
P5b |
K51545 |
0.15 max |
0.30–0.60 |
0.025 |
0.025 |
1.00–2.00 |
4.00–6.00 |
0.45–0.65 |
|
P5c |
K41245 |
0.12 max |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
4.00–6.00 |
0.45–0.65 |
|
P9 |
S50400 |
0.15 max |
0.30–0.60 |
0.025 |
0.025 |
0.25–1.00 |
8.00–10.00 |
0.90–1.10 |
|
P11 |
K11597 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
0.50–1.00 |
1.00–1.50 |
0.44–0.65 |
|
P12 |
K11562 |
0.05–0.15 |
0.30–0.61 |
0.025 |
0.025 |
0.50 max |
0.80–1.25 |
0.44–0.65 |
|
P15 |
K11578 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
1.15–1.65 |
_ |
0.44–0.65 |
|
P21 |
K31545 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
2.65–3.35 |
0.80–1.06 |
|
P22 |
K21590 |
0.05–0.15 |
0.30–0.60 |
0.025 |
0.025 |
0.50 max |
1.90–2.60 |
0.87–1.13 |
|
P23 |
K41650 |
0.04–0.10 |
0.10–0.60 |
0.030 max |
0.010 max |
0.50 max |
1.90–2.60 |
0.05–0.30 |
|
P24 |
K30736 |
0.05–0.10 |
0.30–0.70 |
0.020 |
0.010 |
0.15–0.45 |
2.20–2.60 |
0.90–1.10 |
|
P36 |
K21001 |
0.10–0.17 |
0.80–1.20 |
0.030 max |
0.025 max |
0.25–0.50 |
0.30 max |
0.25–0.50 |
|
P91 |
K91560 |
0.08–0.12 |
0.30–0.60 |
0.020 |
0.010 |
0.20–0.50 |
8.00–9.50 |
0.85–1.05 |
|
P92 |
K92460 |
0.07–0.13 |
0.30–0.60 |
0.020 |
0.010 |
0.50 max |
8.50–9.50 |
0.30–0.60 |
|
P122 |
K92930 |
0.07–0.14 |
0.70 max |
0.020 |
0.010 |
0.50 max |
10.00–11.50 |
0.25–0.60 |
|
P911 |
K91061 |
0.09–0.13 |
0.30–0.60 |
0.020 max |
0.010 max |
0.10–0.50 |
8.5–9.5 |
0.90–1.10 |
Notes:
1, New designation established in accordance with Practice E527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
2, Grade P5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a columbium content of 8 to 10 times the carbon content.
3, Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report.
