ASTM A179 Seamless Steel Tubes

Release Tme: 2023-10-31

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ASTM A179 tubes are made from low-carbon steel, typically with a carbon content of 0.06-0.18%. This low carbon content makes the tubes suitable for bending, flaring, and other forming operations while maintaining good heat transfer properties.
The tubes covered by this specification are typically manufactured using a cold-drawn process, which involves drawing a solid steel billet through a die to reduce its diameter and achieve the desired dimensions and wall thickness. This process results in smooth, clean surfaces and tight tolerances.
Applications: ASTM A179 seamless steel tubes are used in heat exchangers, condensers, and similar heat transfer equipment in various industries, including the power generation, chemical, and manufacturing sectors.
Chemical Composition of ASTM A179,ASME SA179 Seamless Heat-Exchanger and Condenser Tubes

Material	Chemical Composition(%)
Material	C	Si	Mn	P	S
ASTM A179	0.06-0.18	≤ 0.25	0.27-0.63	≤0.035	≤0.035

Mechanical Propertie of ASTM A179,ASME SA179 Seamless Heat-Exchanger and Condenser Tubes

Grade	ASTM A179
Tensile Strength(MPa)	≥325
Yield Strength(MPa)	≥180
Elongation,%	≥35
Hardness, HRB	≤72

Tolerances of Wall Thickness

Outside Diameter, in. [mm]	Wall Thickness, %
	0.095[2.4] and Under		Over 0.095 to 0.150 [2.4 to 3.8], incl		Over 0.150 to 0.180 [3.8 to 4.6], incl		Over 0.180,[4.6]
	Over	Under	Over	Under	Over	Under	Over	Under
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

Outside Diameter,in. [mm]	Permissible Variations, in. [mm]
Outside Diameter,in. [mm]	Over	Under
Under 1 [25.4]	0.004 [0.1]	0.004 [0.1]
1 to 1 1 ⁄ 2 [25.4 to 38.1], incl	0.006 [0.15]	0.006 [0.15]
Over 1 1 ⁄ 2 to 2 [38.1 to 50.8], excl	0.008 [0.2]	0.008 [0.2]
2 to 2 1 ⁄ 2 [50.8 to 63.5], excl	0.010 [0.25]	0.010 [0.25]
2 1 ⁄ 2 to 3 [63.5 to 76.2], excl	0.012 [0.3]	0.012 [0.3]
3 to 4 [76.2 to 101.6], incl	0.015 [0.38]	0.015 [0.38]
Over 4 to 7 1 ⁄ 2 [101.6 to 190.5], incl	0.015 [0.38]	0.025 [0.64]
Over 7 1 ⁄ 2 to 9 [190.5 to 228.6], incl	0.015 [0.38]	0.045 [1.14]

Tolerances of Length

Method of Manufacture	Outside Diameter, in. [mm]	Cut Length,in. [mm]
Method of Manufacture	Outside Diameter, in. [mm]	Over	Under
Seamless, cold-finished	Under 2 [50.8]	1 ⁄ 8 [3]	0 [0]
	2 [50.8] and over	3 ⁄ 16 [5]	0 [0]
	2 [50.8] and over	3 ⁄ 16 [5]	0 [0]