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ASTM A335/A335M--Seamless FerriticAlloy-Steel Pipefor High-Temperature Service
ASTM A335 / A335M Grades
|
Grades |
UNS Designation |
|
P1 |
K11522 |
|
P2 |
K11547 |
|
P5 |
K41545 |
|
P5b |
K51545 |
|
P5c |
K41245 |
|
P9 |
S50400 |
|
P11 |
K11597 |
|
P12 |
K11562 |
|
P15 |
K11578 |
|
P21 |
K31545 |
|
P22 |
K21590 |
|
P23 |
K41650 |
|
P24 |
K30736 |
|
P36 |
K21001 |
|
P91 |
K91560 |
Chemical Composition
|
Chemical Components (%) |
||||||||||||
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
V |
Nb |
N |
Al |
others |
|
P11 |
0.05-0.15 |
0.30-0.60 |
≤0.025 |
≤0.025 |
0.50-1.00 |
1.0-1.50 |
0.44-0.65 |
/ |
/ |
/ |
/ |
/ |
|
P12 |
0.05-0.15 |
0.30-0.61 |
≤0.025 |
≤0.025 |
≤0.50 |
0.80-1.25 |
0.45-0.65 |
/ |
/ |
/ |
/ |
/ |
|
P22 |
0.05-0.15 |
0.30-0.60 |
≤0.025 |
≤0.025 |
≤0.50 |
1.90-2.60 |
0.87-1.13 |
/ |
/ |
/ |
/ |
/ |
|
P91 |
0.08-0.12 |
0.30-0.60 |
≤0.020 |
≤0.010 |
0.20-0.50 |
8.0-9.50 |
0.85-1.05 |
0.18-0.25 |
0.030-0.070 |
≤0.40 |
≤0.02 |
Cb 0.06-0.10 Ti 0.01max Zr 0.01max |
Heat Treatment Requirements
|
Grade |
UNS Number |
Heat Treat Type |
Austenitizing/ Solutioning Temperature, min or range °F [°C] |
Subcritical Annealing or Tempering Temperature, Min or range °F [°C] |
|
P11 |
K11597 |
full or isothermal anneal normalize and temper |
… |
1200 [650] |
|
P12 |
K11562 |
full or isothermal anneal normalize and temper subcritical anneal |
… |
1200 [650] 1200-1300 [650 to 705] |
|
P22 |
K21590 |
full or isothermal anneal normalize and temper |
… |
1250 [675] |
|
P91 |
K91560 |
normalize and temper quench and temper |
1900-1975[1040-1080] 1900-1975[1040-1080] |
1350-1470[730-800] 1350-1470[730-800] |
Tensile Requirements and Hardness:
|
Mechanical Properties |
||||
|
Grade |
Tensile |
Yield |
Elongation |
Hardness |
|
Strength (Mpa) |
Strength (Mpa) |
(%) |
|
|
|
P11 P12 |
≥415 |
≥220 |
≥30 |
≤89HRB |
|
P22 |
≥415 |
≥200 |
≥30 |
≤89HRB |
|
P91 |
≥585 |
≥415 |
≥20 |
91HRB-25HRC |
Flattening Test—One flattening test shall be made on specimens from each end of one finished tube, not the one used for the flaring test, from each lot
Flaring Test—One flaring test shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot
Hydrostatic or Nondestructive Electric Test—Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.
