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Standard: ASTM A209/A209M Steel grade: T1, T1a, T1b Size: OD(8-76mm)×WT(1-13mm) Production: cold-drawing and hot rolling Application: Used for the boilaer and superheater |
Chemical composition
|
Chemical composition (%) |
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 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%.
Hardness requirements
|
Hardness requirements |
Grade |
S≥5.1mm (Briness hardness) |
S<5.1mm (Rockwell hardness ) |
|
T1 |
≤146HB |
≤80HRB |
|
|
T1a |
≤153HB |
≤81HRB |
|
|
T1b |
≤137HB |
≤77HRB |