|
|
Grade |
P-5 |
P-9 |
P-11 |
P-22 |
P-91 |
P-91 shall also include the following: |
|
Element |
UNS Designation |
K41545 |
S50400 |
K11597 |
K21590 |
K91560 |
|
|
Carbon |
0.15 max |
0.15 max |
0.05 – 0.15 |
0.05 – 0.15 |
0.08 – 0.12 |
V at 0.18 – 0.25 |
|
|
Manganese |
0.30 – 0.60 |
0.30 – 0.60 |
0.30 – 0.60 |
0.30 – 0.60 |
0.30 – 0.60 |
N at 0.030 – 0.070 |
|
|
Phosphorous, max |
0.025 |
0.025 |
0.025 |
0.025 |
0.02 |
Ni at 0.40 max |
|
|
Sulfur, max |
0.025 |
0.025 |
0.025 |
0.025 |
0.01 |
Al at 0.02 max |
|
|
Silicon |
0.50 max |
0.25 – 1.00 |
0.50 – 1.00 |
0.50 max |
0.20 -0.50 |
Cb at 0.06 – 0.10 |
|
|
Chromium |
4.00 – 6.00 |
8.00 – 10.00 |
1.00 – 1.50 |
1.90 – 2.60 |
8.00 – 9.50 |
Ti at 0.01 max |
|
|
Molybdenum |
0.45 -0.65 |
0.90 – 1.10 |
0.44 – 0.65 |
0.87 – 1.13 |
0.85 – 1.05 |
Zr at 0.01 max |
|
|
|
P-5 |
P-9 |
P-11 |
P-22 |
P-91 |
|
Tensile Strength, min., psi |
|
|
|
|
|
|
ksi |
60 |
60 |
60 |
60 |
85 |
|
MPa |
415 |
415 |
415 |
415 |
585 |
|
Yield Strength, min., psi |
|
|
|
|
|
|
ksi |
30 |
30 |
30 |
30 |
60 |
|
MPa |
205 |
205 |
205 |
205 |
415 |
|
P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. |
|||||
|
NPS [DN] Designator |
Over |
Under |
||
|
|
in. |
mm |
in. |
mm |
|
1/8 to 1 1/2 [6 to 40], incl. |
1/64 (0.015) |
0.4 |
1/64 (0.015) |
0.4 |
|
Over 1 1/2 to 4 [40 to 100], incl. |
1/32 (0.031) |
0.79 |
1/32 (0.031) |
0.79 |
|
Over 4 to 8 [100 to 200], incl. |
1/16 (0.062) |
1.59 |
1/32 (0.031) |
0.79 |
|
Over 8 to 12 [200 to 300], incl. |
3/32 (0.093) |
2.38 |
1/32 (0.031) |
0.79 |
|
Over 12 [300] |
+/- 1% of the specified outside diameter |
|||
|
NPS [DN] Designator |
Tolerance, % from Specified |
|
|
|
Over |
Under |
|
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios |
20.00% |
12.50% |
|
Above 2 1/2 [65], t/D < or = 5% |
22.50% |
12.50% |
|
Above 2 1/2 [65], t/D > 5% |
15.00% |
12.50% |
|
(t = Specified Wall Thickness; D = Specified Outside Diameter) |
||
