ASTM A209 Grade T1a 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 T1a Seamless  Steel Tubes covers minimum-wall-thickness, seamless, carbon-molybdenum alloy-steel,boiler and superheater tubes.
 
 
ASTM A209 Grade T1a 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
 
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
 
 
 
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
 
 
 
 
 
 
 
 
 
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

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Φ32

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Φ34-Φ36

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Φ38

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Φ40

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Φ42

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Φ45

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Φ48-Φ60

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Φ63.5

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Φ68-Φ73

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Φ76

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Φ80

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Φ83

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Φ89

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Φ95

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Φ102

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Φ108

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Φ114

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Φ121

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Φ127

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Note: Material furnished under ASTM A209 conform to the applicable requirements of the current edition of Specification A1016/A1016M