ASTM A250 ERW Welded Tubes

ASTM A250 ERW Welded Tubes

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 (XS), 80, 100, 120, 140, 160, XXS & heavier
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Product Details

ASTM A250  ERW  Welded Tubes

This specification covered several grades, designated T1, T1a, T1b, T2, T11, T12 and T22, of minimum-wall-thickness,electric-resistance-welded,carbon-molybdenum

and chromium-molybdenum alloy-steel, boiler and super heater tubes. 

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 (XS), 80, 100, 120, 140, 160, XXS & heavier 

Chemical composition

element

Composition %

Gr T1

Gr T1a

Gr T1b

Gr T2

GrT11

Gr T12

Gr T22

carbon

0.1-0.2

0.15-0.25

0.14

0.1-0.2

0.05-0.15

0.05-0.15

0.15

manganses

0.3-0.8

0.3-0.8

0.3-0.8

0.3-0.61

0.3-0.6

0.3-0.61

0.3-0.6

PH

0.025

0.025

0.025

0.025

0.025

0.03

0.025

S

0.025

0.025

0.025

0.025

0.02

0.02

0.02

Si

0.1-0.5

0.1-0.5

0.1-0.5

0.1-0.3

0.5-1.0

0.5

0.5

Molybdemum

0.44-0.65

0.44-0.35

0.44-0.65

0.44-0.65

0.44-0.65

0.44-0.65

0.87-1.13

chromlum

...

...

...

0.5-0.81

1.0-1.5

0.8-1.25

1.9-2.6

Mechanical properties

Grade

T1

T1a

T1b

T2

T11

T12

T22

Ts MPa

380

415

365

415

415

415

415

Ys MPa

205

220

195

205

205

220

205

Elongation

30

30

30

30

30

30

30

 Package: hexagonal bundled or loose packing.

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