ASTM A209 Seamless Carbon Steel Tube

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ASTM A209

Standard Overview:
ASTM A209 is mainly concerned with seamless carbon-molybdenum alloy steel boiler and superheater tubes for high temperature service.

Main Material:
Carbon-molybdenum alloy steel, especially T1 and T1a grades.

Scope of Application:
Mainly used in boiler and superheater systems, especially in industrial environments such as power stations, chemical plants and refineries that require high temperature and high pressure operation.

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Specification of ASTM A209

Standard	ASTM A209
Application	Seamless carbon-molybdenum alloy-steel boiler and superheater tubes
Procedure	Seamless
Steel Grade	Gr.T1 , Gr.T1a , Gr.T1b
Tolerance	Wall Thickness: +/- 10%, Mass: 0/+16%

Dimension

Outside Diameter：	1⁄2 to 5 in. [12.7 to 127 mm]
Wall Thickness：	0.035 to 0.500 in. [0.9 to 12.7 mm]

Chemical Requirement

Chemical Composition Requirements
Element	Composition, %
Element	Grade T1	Grade T1a	Grade T1b
Carbon	0.10–0.20	0.15–0.25	0.14 max
Manganese	0.30–0.80	0.30–0.80	0.30–0.80
Phosphorus, max	0.025	0.025	0.025
Sulfur, max	0.025	0.025	0.025
Silicon	0.10–0.50	0.10–0.50	0.10–0.50
Molybdenum	0.44–0.65	0.44–0.65	0.44–0.65

Mechanical Requirement

Tensile Requirements
Mechanical Properties	Grade T1	Grade T1b	Grade T1a
Tensile strength, min, ksi [MPa]	55 [380]	53 [365]	60 [415]
Yield strength, min, ksi [MPa]	30 [205]	28 [195]	32 [220]
Elongation in 2 in. or 50 mm, min, %	30	30	30
For longitudinal strip tests a deduction shall be made for each 1⁄32-in. [0.8-mm] decrease in wall thickness below 5⁄16 in. [8 mm] from the basic minimum elongation of the following percentageWhen standard round 2-in. or 50-mm gage length or smaller proportion ally sized specimen with the gage length equal to 4D (four times the diameter) is used	1.50A 22	1.50A 22	1.50A 22

Why Choose UNIASEN?

We offer a variety of shapes and sizes, using the latest technology to manufacture them and selecting the best steel for strength and longevity.
You can choose from different coatings, end types, and ways to connect the pipes.
We make sure the steel has just the right amount of carbon, molybdenum, and other elements. This makes our pipes strong and durable and helps them resist rust.
We test ASTM A209 steel pipes to ensure they are strong and tough enough to withstand high pressures and temperatures.

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