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Standard: ASTM A335/ASME SA335 Steel grade: P5, P9, P11, P12, P22, P91, P92 Size: OD (90-1200mm) x WT (25-150mm) Application: Used for boiler, power plants and nuclear plants. |
Tolerance on dimension:
NPS OD Tolerance NPS WT Tolerance 1/8" ≦ NPS ≦ 1 1/2" +/- 0.4 1/8" ≦ NPS ≦ 2 1/2", All T/D ratios. +20%, -12.5% 1 1/2 < NPS ≦ 4" +/- 0.79 NPS ≧ 2 1/2", T/D ≦ 5% +22.5%, -12.5% 4" < NPS ≦ 8" +1.59, -0.79 NPS ≧ 2 1/2", T/D > 5% +15%, -12.5% 8" < NPS ≦ 12" +2.38, -0.79 (T= Specified Wall Thickness; D = Specified Outside Diameter) NPS > 12" +/- 1%
Chemical Composition:
|
Chemical Composition (%) |
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|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Cu |
Ni |
V |
Al |
W |
Nb |
N |
|
P11 |
0.05~0.15 |
0.5~1.0 |
0.3~0.6 |
≤0.03 |
≤0.03 |
1.0~1.5 |
0.5~1.0 |
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P12 |
0.05~0.15 |
≤0.5 |
0.3~0.61 |
≤0.03 |
≤0.03 |
0.8~1.25 |
0.44~0.65 |
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|
|
P22 |
0.05~0.15 |
≤0.5 |
0.3~0.6 |
≤0.03 |
≤0.03 |
1.9~2.6 |
0.87~1.13 |
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P5 |
≤0.15 |
≤0.5 |
0.3~0.6 |
≤0.03 |
≤0.03 |
4.0~6.0 |
0.45~0.65 |
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P91 |
0.08~0.12 |
0.2~0.5 |
0.3~0.6 |
≤0.02 |
≤0.01 |
8.0~9.5 |
0.85~1.05 |
|
≤0.4 |
0.18~0.25 |
≤0.015 |
|
0.06~0.10 |
0.03~0.07 |
|
P92 |
0.07~0.13 |
≤0.5 |
0.3~0.6 |
≤0.02 |
≤0.01 |
8.5~9.5 |
0.3~0.6 |
B0.001 0.006 |
≤0.4 |
0.15~0.25 |
≤0.015 |
1.5~2.0 |
0.04~0.09 |
0.03~0.07 |
Mechanical Properties:
|
Mechanical Properties |
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|
Grade |
Tensile strength(MPa) |
Yield strength(MPa) |
Elongation(%) |
Impact energy(J) |
Hardness |
|
P11 |
≥415 |
≥205 |
≥22 |
≥35 |
≤163HB |
|
P12 |
≥415 |
≥220 |
≥22 |
≥35 |
≤163HB |
|
P22 |
≥415 |
≥205 |
≥22 |
≥35 |
≤163HB |
|
P5 |
≥415 |
≥205 |
≥22 |
≥35 |
≤187HB |
|
P91 |
585~760 |
≥415 |
≥20 |
≥35 |
≤250HB |
|
P92 |
≥620 |
≥440 |
≥20 |
≥35 |
250HB |