 |
Standard: ASTM A335/ASME SA335 Steel grade: P5, P9, P11, P12, P22, P91, P92 Size: 1” ~ 24” 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
(%) |
||||||||||||||
|
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 |
|
|
|
|
|
|
|
|
P12 |
0.05~ 0.15 |
≤ 0.5 |
0.3~ 0.61 |
≤0.03 |
≤0.03 |
0.8~ 1.25 |
0.44~ 0.65 |
|
|
|
|
|
|
|
|
P22 |
0.05~ 0.15 |
≤0.5 |
0.3~ 0.6 |
≤0.03 |
≤0.03 |
1.9~2.6 |
0.87~ 1.13 |
|
|
|
|
|
|
|
|
P5 |
≤0.15 |
≤0.5 |
0.3~ 0.6 |
≤0.03 |
≤0.03 |
4.0~6.0 |
0.45~ 0.65 |
|
|
|
|
|
|
|
|
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 |
|||||
|
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 |