Complaint
ASTM A250 Fe alloy-steel boiler tubes is a type of seamless steel tubes. They are divided into structural seamless tubes and high-pressure heat-resistant alloy tubes. Mainly different from the production standards and application fields. Annealing and tempering change its mechanical properties to achieve the required processing conditions. Its performance is higher than that of general seamless steel tubes. It has higher variability utilization value, alloy tube contains more Cr in chemical composition, and has high and low temperature resistance as well as corrosion resistance.
OD:12.7 to 127 mm
WT:0.9 to 8.1 mm
Grade:ASTM A250 T1, T1a, T1b, T2, T11, T12, T22
Schedules : 20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100, 120, 140, 160, XXH & heavier
Form:Round, Square, Rectangular, Hydraulic Etc.
Length:Single Random, Double Random & Cut Length.
Tubing End: Plain End, Beveled End, Threaded.
Chemical composition
element | Chemical % | |||
Gr T2 | GrT11 | Gr T12 | Gr T22 | |
carbon | 0.1-0.2 | 0.05-0.15 | 0.05-0.15 | 0.15 |
manganese | 0.3-0.61 | 0.3-0.6 | 0.3-0.61 | 0.3-0.6 |
PH | 0.025 | 0.025 | 0.03 | 0.025 |
S | 0.025 | 0.02 | 0.02 | 0.02 |
Si | 0.1-0.3 | 0.5-1.0 | 0.5 | 0.5 |
Molybdenum | 0.44-0.65 | 0.44-0.65 | 0.44-0.65 | 0.87-1.13 |
chromium | 0.5-0.81 | 1.0-1.5 | 0.8-1.25 | 1.9-2.6 |
Mechanical properties
Grade | T2 | T11 | T12 | T22 |
Ts MPa | 415 | 415 | 415 | 415 |
Ys MPa | 205 | 205 | 220 | 205 |
Elongation | 30 | 30 | 30 | 30 |
Outside Diameter of ASTM A250/ASME SA250 T2, T11, T12, T22 Seamless Pressure Tubes:
Outside diameter | OD Tolerance | WT Tolerance | Ovality Tolerance | Cut Length Tolerance |
OD≤ 12.7 mm | ± 0, 13 mm | ± 15 % | - | + 3, 18 mm, - 0 mm |
12.7mm< OD≤38.1 mm | ± 0, 13 mm | ± 10 % | max, 1, 65 mm | + 3, 18 mm, - 0 mm |
38.1 mm < OD≤ 88. 9 mm | ± 0, 25 mm | ± 10 % | max, 2, 41 mm | + 4, 76 mm, - 0 mm |
Lead time 10-15 days | 80% of output for export
Shipping Information
| FOB Port | Tianjin | ||||
|---|---|---|---|---|---|
| Weight per Unit | 1500.0 Kilograms | ||||
| HTS Code | 7304.41.90 00 | ||||
| Export Carton Dimensions L/W/H | 11.8 x 1.0 x 0.8 Meters | ||||
| Lead Time | 15-30 days | ||||
|---|---|---|---|---|---|
| Dimensions per Unit | 11.8 x 1.0 x 0.8 Meters | ||||
| Units per Export Carton | 25.0 | ||||
| Export Carton Weight | 1500.0 Kilograms | ||||
