ASTM A209/ASME SA209
Grade T1a Alloy-Steel Boiler Tubes
ASTM A209/ASME SA209 Grade T1a Alloy-Steel Boiler Tubes
Short Description:
Hot-finished ASTM A209 Grade T1a Boiler and Superheater Tubes are heat treated at a temperature of 1200°F [650°C] or higher. Cold-finished tubes, after the final cold finishing, are heat treated at a temperature of 1200 °F [650 °C] or higher.
Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes
ASTM A209 Grade T1a Seamless Steel Tubes covers minimum-wall-thickness, seamless, carbon-molybdenum alloy-steel,boiler and superheater tubes.
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, Threaded
Materials and Manufacture
The steel shall be killed.
ASTM A209 Grade T1a Alloy-Steel Boiler and Superheater Tubes are made by the seamless process and shall be either hot-finished or cold-finished, as specified.
HeatTreatment
Hot-finished ASTM A209 Grade T1a Boiler and Superheater Tubes are heat treated at a temperature of 1200 °F [650 °C] or higher.
Cold-finished tubes , after the final cold finishing, are 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 Grade T1a
| Element | Composition, % |
| Grade T1a | |
| Carbon | 0.15–0.25 |
| 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 Grade T1a
| Grade T1a | |
| Tensile strength, min, ksi [MPa] | 53 [365] |
| Yield strength, min, ksi [MPa] | 38 [195] |
| 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 | 153 |
| Rockwell Hardness Number (Tubes less than 0.200 in. [5.1 mm] in Wall Thickness), HRB | 81 |
Tests
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.
The dimensional tolerances of ASTM A209 Alloy-Steel Boiler and Superheater Tubes
Tolerances of Wall Thickness
| Wall Thickness, % | ||||||||
| Outside Diameter in. [mm] | 0.095 [2.4] and Under | Over 0.095 to 0.150 [2.4 to 3.8], incl | Over 0.150 to 0.0180 [3.8 to 4.6], incl | Over 0.180 [4.6] | ||||
| Over | Under | Over | Under | Over | Under | Over | Under | |
| Seamless, Hot-Finished Tubes | ||||||||
| 4 [100] and under | 40 | 0 | 35 | 0 | 33 | 0 | 28 | 0 |
| Over 4 [100] | …. | …. | 35 | 0 | 33 | 0 | 28 | 0 |
| Seamless, Cold-Finished Tubes | ||||||||
| Over | Under | |||||||
| 1 1 ⁄ 2 [38.1] and under | 20 | 0 | ||||||
| Over 1 1 ⁄ 2 [38.1] | 22 | 0 | ||||||
Tolerances of Outside Diameter
| Pecified Outside Diameter,in. [mm] | Permitted Variations, in. [mm] | |
| Over | Under | |
| Hot-Finished Seamless Tubes | ||
| 4 [100] or under | 1 ⁄ 64 [0.4] | 1 ⁄ 32 [0.8] |
| Over 4 to 7 1 ⁄ 2 [100 to 200], incl | 1 ⁄ 64 [0.4] | 3 ⁄ 64 [1.2] |
| Over 7 1 ⁄ 2 to 9 [200 to 225], incl | 1 ⁄ 64 [0.4] | 1 ⁄ 16 [1.6] |
| Cold-Finished Seamless Tubes | ||
| Under 1 [25] | 0.004 [0.1] | 0.004 [0.11] |
| 1 to 1 1 ⁄ 2 [25 to 40], incl | 0.006 [0.15] | 0.006 [0.15] |
| Over 1 1 ⁄ 2 to 2 [40 to 50], excl | 0.008 [0.2] | 0.008 [0.2] |
| 2 to 2 1 ⁄ 2 [50 to 65], excl | 0.010 [0.25] | 0.010 [0.25] |
| 2 1 ⁄ 2 to 3 [65 to 75], excl | 0.012 [0.3] | 0.012 [0.3] |
| 3 to 4 [75 to 100], incl | 0.015 [0.38] | 0.015 [0.38] |
| Over 4 to 7 1 ⁄ 2 [100 to 200], incl | 0.015 [0.38] | 0.025 [0.64] |
| Over 7 1 ⁄ 2 to 9 [200 to 225], incl | 0.015 [0.38] | 0.045 [1.14] |
Tolerances of Length
| Method of Manufacture | Specified Outside Diameter, in.[mm] | Cut Length, in. [mm] | |
| Over | Under | ||
| Seamless, hot-finished | All sizes | 3 ⁄ 16 [5] | 0 [0] |
| Seamless, cold-finished | Under 2 [50.8] | 1 ⁄ 8 [3] | 0 [0] |
| 2 [50.8] or over | 3 ⁄ 16 [5] | 0 [0] | |
| 2 [50.8] or over | 3 ⁄ 16 [5] | 0 [0] | |
Product Marking
In addition to the marking prescribed in Specification A1016/A1016M, the marking shall include whether the tube is hot-finished or cold-finished.
Photos of ASTM A209 Grade T1a Alloy-Steel Boiler and Superheater Tubes
Specification of ASTM A209 Grade T1a Alloy-Steel Boiler and Superheater Tubes
| OD (mm) | Wall Thickness(mm) | |||||||||||||
| 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 6 | 6.5-7 | 7.5-8 | 8.5-9 | 9.5-10 | 11 | 12 | |
| Φ25-Φ28 | ● | ● | ● | ● | ● | ● | ||||||||
| Φ32 | ● | ● | ● | ● | ● | ● | ||||||||
| Φ34-Φ36 | ● | ● | ● | ● | ● | ● | ||||||||
| Φ38 | ● | ● | ● | ● | ● | ● | ||||||||
| Φ40 | ● | ● | ● | ● | ● | |||||||||
| Φ42 | ● | ● | ● | ● | ● | |||||||||
| Φ45 | ● | ● | ● | ● | ● | ● | ||||||||
| Φ48-Φ60 | ● | ● | ● | ● | ● | ● | ● | |||||||
| Φ63.5 | ● | ● | ● | ● | ● | ● | ● | |||||||
| Φ68-Φ73 | ● | ● | ● | ● | ● | ● | ||||||||
| Φ76 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ80 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ83 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ89 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ95 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ102 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ108 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
| Φ114 | ● | ● | ● | ● | ● | ● | ● | ● | ● | |||||
| Φ121 | ● | ● | ● | ● | ● | ● | ● | ● | ● | |||||
| Φ127 | ● | ● | ● | ● | ● | ● | ● | ● | ● | |||||
Material furnished under ASTM A209 conform to the applicable requirements of the current edition of Specification A1016/A1016M