ASTM A250M-04 ERW Welded Super Heater Tubes

ASTM A250M-04 ERW Welded 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 (XH), 80, 100, 120, 140, 160, XXH & heavier
Length: 5.8, 6, 11.8, 12m, or as needed
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Product Details

ASTM A250M-04  ERW  Welded Super Heater 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 (XH), 80, 100, 120, 140, 160, XXH & heavier

Length: 5.8, 6, 11.8, 12m, or as needed

 Chemical composition

element

Gr T1

Gr T1a

Gr T1b

carbon

0.1-0.2

0.15-0.25

0.14

manganses

0.3-0.8

0.3-0.8

0.3-0.8

PH

0.025

0.025

0.025

S

0.025

0.025

0.025

Si

0.1-0.5

0.1-0.5

0.1-0.5

Molybdemum

0.44-0.65

0.44-0.35

0.44-0.65

 Mechanical properties

Grade

T1

T1a

T1b

Ts MPa

380

415

365

Ys MPa

205

220

195

Elongation

30

30

30

 Uses: widely used in oil, food, chemical industry, construction, electricity, nuclear, biotechnology, machinery, paper, shipbuilding and boiler

Shape: square, round and rectangular

Surface: black, pre-galvanized, hot galvanized, oiled and painted

Delivery status: hot rolled, annealed, normalized, hardened and tempered

Package: hexagonal bundled or loose packing.

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