heat exchangers steel tube

A179 SA179

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Suitable for steel tubes for tubular heat exchangers, condensers and similar heat transfer equipment,

ASTM A179/ASME SA179------American Association of Materials and testing Standards

The main production grades of steel pipes are as follows:

A179、SA179

Typical Size

It is important to note that the ASTM A179/ASME SA179 is a standard that covers tubes ranging from 1/8 to 3 in. [3.2 to 76.2 mm] as typical size, inclusive, in outside diameter. Mechanical property requirements do not apply to tubing smaller than 1/8 in, [3.2 mm] in outer diameter or with a wall thickness under 0.015 inches [0.4 mm].

Normal Size

OD. (In,mm):

3/4” (19.05mm);

1” (25.4mm);

1¼” (31.75mm);

1½” (38.1mm);

2” (50.8mm);

2½” (63.5mm);

3” (76.2mm).

Wall Thickness (BWG, mm)

16BWG (1.651mm);

14BWG(2.108mm);

12BWG(2.769mm);

10BWG(3.404mm);

8BWG(4.191mm)

Length(ft, mm):

16ft(4877mm);

20ft(6096mm);

24ft(7315mm);

Any other fixed length.

Max length is 28000mm

Test requirements

Chemical Compositions of ASTM A179 Tubes

Chemical Components (%)
C	Si	Mn	P	S	Mo	Cr	V
0.06-0.18	/	0.27-0.63	≤0.035	≤0.035	/	/	/

Mechanical Properties of ASTM A179 Tubes

Mechanical Properties

Tensile

Strength (Mpa)

Yield

Strength (Mpa)

Elongation

(%)

Hardness

(HRB)

≥325

≥180

≥35

≤72

Wall Thickness Tolerance of test requirements

Seamless, Cold-Finished Tubes
Outside Diameter In. (mm)	Wall thickness Tolerance %
Outside Diameter In. (mm)	Over (+)	Under (-)
1 ½ (38.1) and under	20	0
Over 1½ (38.1)	22	0

Outside Diameter Tolerance of test requirements

Cold-Finished Seamless Tubes
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 ½ (25.4 to 38.1), Incl	0.006 (0.15)	0.006 (0.15)
Over 11⁄2 to 2 [38.1 to 50.8], Excl	0.008 (0.2)	0.008 (0.2)
2 to 21⁄2 [50.8 to 63.5], Excl	0.010 (0.25)	0.010 (0.25)
21⁄2 to 3 [63.5 to 76.2], Excl	0.012 (0.3)	0.012 (0.3)

Cut Length Tolerance

Cold-Finished Seamless Tubes
Outside diameter, In.(mm)	Cut length, in. (mm)
Outside diameter, In.(mm)	Over(+)	Under(-)
All Sizes	3⁄16 [5]	0 [0]
Under 2 [50.8]	1⁄8 [3]	0 [0]
2 [50.8] and over	3⁄16 [5]	0 [0]
Under 2 [50.8]	1⁄8 [3]	0 [0]
2 [50.8] and over	3⁄16 [5]	0 [0]
These permissible variations in length apply to tubes before bending. They used to cut lengths up to 24 ft [7.3 m]. For lengths longer than 24 ft [7.3 m], the above over-tolerances shall be increased by 1⁄8 in. [3 mm] for each 10 ft [3 m] or fraction over 24 ft or 1⁄2 in. [13 mm], whichever is the lesser. ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,A179,ASTM,SA179,,ASTM,SA179,ASTM,SA179,A179,ASTM,SA179,

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