astm a209 boiler pipe

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What is the ASTM standard for boiler tubing?

1.1 This standard applies to seamless carbon steel boilers and superheater tubes with minimum wall thickness for rolling. 1.2 The general dimensions and thickness of the pipe provided by the standard are: outer diameter 1/2~7in. (12.7~177.8mm), minimum wall thickness 0.085~ l.

Chemical Composition Of ASTM A209

Element	Composition, %
Element	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
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

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