ASTM A209 ASME SA209 Grade T1 Alloy Steel Boiler And Superheater Tubes
Standard: ASTM A209 / A209M Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes
ASTM A209 Grade T1 Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes covers tubes 1 ⁄ 2 to 5 in. [12.7 to 127mm] inclusive, in outside diameter and 0.035 to 0.500 in. [0.9 to 12.7 mm], inclusive, in minimum wall thickness.
ASTM A209 ASME SA209 Grade T1 Alloy Steel Boiler and Superheater Tubes Quick Details
Manufacture: Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 0.9 mm——12.7 mm.
Outer diameter (OD): 12.7 mm——127 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
HeatTreatment: Hot-finished tubes shall be heat treated at a temperature of 1200 °F [650 °C] or higher. Cold-finished tubes shall, after the final cold finishing, be heat treated at a temperature of 1200 °F [650 °C] or higher, or tubing may be furnished in the full-annealed, isothermal annealed, or normalized and tempered condition.
Chemical Composition Of ASTM A209 ASME SA209 Grade T1 Alloy Steel Boiler And Superheater Tubes
|
Element |
Composition, % |
|
Grade T1 |
|
|
Carbon |
0.10–0.20 |
|
Manganese |
0.30–0.80 |
| Phosphorus, max |
0.025 |
|
Sulfur, max |
0.025 |
|
Silicon |
0.10–0.50 |
| Molybdenum |
0.44–0.65 |
Mechanical Properties Of ASTM A209 ASME SA209 Grade T1 Alloy Steel Boiler And Superheater Tubes
|
Grade T1 |
|
|
Tensile strength, min, ksi [MPa] |
55 [380] |
| Yield strength, min, ksi [MPa] |
30 [205] |
| Elongation in 2 in. or 50 mm, min, % |
30 |
| For longitudinal strip tests a deduction shall be made for each 1 ⁄ 32 -in. [0.8-mm] decrease in wall thickness below 5 ⁄ 1 6 in. [8 mm] from the basic minimum elongation of the following percentage |
1.50 A |
| When standard round 2-in. or 50-mm gage length or smaller proportionally sized specimen with the gage length equal to 4D (four times the diameter) is used |
22 |
| Brinell Hardness Number (Tubes 0.200 in. [5.1 mm] and over in Wall Thickness), HBW |
146 |
| Rockwell Hardness Number (Tubes less than 0.200 in. [5.1 mm] in Wall Thickness), HRB |
80 |
Tests of ASTM A209 ASME SA209 Grade T1 Alloy Steel Boiler And Superheater Tubes
Tension Test—One tension test shall be made on a specimen for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes
Flattening Test—One flattening test shall be made on specimens from each end ofone finished tube.
Flaring Test—One flaring test shall be made on specimens from each end ofone finished tube.
Hardness Test—Brinell or Rockwell hardness tests shall be made on specimens from two tubes from each lot.
