ASTM A250 Fe Alloy-Steel Boiler Tubes

OD: 12.7 to 127 mm
WT: 0.9 to 8.1 mm
Grade: ASTM A250 T1, T1a, T1b, T2, T11, T12, T22
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Product Details

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

ASTM A250 Fe alloy-steel boiler tubes are widely used in the mechanical treatment field, petrochemical industry, construction field, transportation fields of fluids, gas in low and medium pressure boiler in the projects and big equipment. For example in fulcrum bearing, transport of water, oil, gas, steam tube, big smoke tube, small smoke tube, generating tube etc.

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