ASTM A209/ASME SA209 Seamless Carbon-Molybdenum Alloy-Steel Boiler And Superheater Tubes
 |
Standard: ASTM A209/ASME SA209 Material: T1, T1a, T1b Size: OD (12.7-127mm) x WT (0.9-12.7mm) Application: Superheater, Heat Exchanger, etc. |
Chemical composition (%):
|
Chemical composition
(%) |
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|
Grade |
C |
Mn |
P |
S |
Si |
Mo |
|
T1 |
0.10~0.20 |
0.30~0.80 |
≤0.025 |
≤0.025 |
0.10~0.50 |
0.44~0.65 |
|
T1a |
0.15~0.25 |
0.30~0.80 |
≤0.025 |
≤0.025 |
0.10~0.50 |
0.44~0.65 |
|
T1b |
≤0.14 |
0.30~0.80 |
≤0.025 |
≤0.025 |
0.10~0.50 |
0.44~0.65 |
Mechanical properties:
|
Mechanical properties |
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|
Grade |
Tensile strength (Mpa) |
Yield strength (Mpa) |
Elongation(%) S≥8mm |
Elongation (%)
S<8mm |
Elongation(%) Standard circle |
|
T1 |
≥380 |
≥205 |
≥30 |
<30 |
≥22 |
|
T1a |
≥415 |
≥220 |
≥30 |
<30 |
≥22 |
|
T1b |
≥365 |
≥195 |
≥30 |
<30 |
≥22 |
|
Note: |
A sample of the longitudinal S < 8mm, wall
thickness of each 0.8mm, minimum elongation values from the above basic
elongation of minus 1.5%. |
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Hardness requirements:
|
Hardness requirements |
Grade |
S≥5.1mm (Brinell hardness) |
S<5.1mm (Rockwell hardness) |
|
T1 |
≤146HB |
≤80HRB |
|
|
T1a |
≤153HB |
≤81HRB |
|
|
T1b |
≤137HB |
≤77HRB |