ASTM A179 Boiler Tube

Short Description:

Manufacture: Seamless process ,cold drawn.
Wall thickness(WT): 2.0 mm——12.7 mm.
Outer diameter (OD): 12.7mm——76.2 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
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


Product Detail

Product Tags

ASTM A179, ASME SA179 steel tubes covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.

ASTM A179, ASME SA179 covers tubes 1/8 to 3 in. [3.2 to 76.2 mm], inclusive, in outside diameter.

ASTM A179,ASME SA179 Seamless Tube Specification:

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

Φ32

Φ34-Φ36

Φ38

Φ40

Φ42

Φ45

Φ48-Φ60

Φ63.5

Φ68-Φ73

Φ76

Manufacture
ASTM A179,ASME SA179 steel tubes are made by the seamless process and shall be cold drawn.

Heat Treatment of ASTM A179,ASME SA179
ASTM A179,ASME SA179 steel tubes are heat treated after the final cold draw pass at a temperature of 1200°F [650°C] or higher.

Chemical Composition of ASTM A179,ASME SA179 Seamless Heat-Exchanger and Condenser Tubes

Material

Chemical Composition(%)

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

Note —Tubing smaller in outside diameter and having a thinner wall than indicated in this specification is available. Mechanical property requirements do not apply to tubing smaller than 1/8 in. [3.2 mm] in outside diameter or with a wall thickness under 0.015 in. [0.4 mm].

The dimensional tolerances of ASTM A179,ASME SA179 Seamless Heat-Exchanger and Condenser Tubes 

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]

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]

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]

Mechanical Tests Required
(1)Flattening Test—One flattening test shall be made on specimens from each of two tubes from each lot or fraction thereof.
(2)Flaring Test—One flaring test shall be made on speci- mens from each of two tubes from each lot  or fraction thereof.
(3) Flange Test—When specified as a substitute for the flaring test, for tubes having a wall thickness (actual mean wall) less than 10 % of the outside diameter, one test shall be made on specimens from each of two tubes
(4)Hardness Test—Rockwell hardness tests shall be made on specimens from two tubes from each lot.
(5) Hydrostatic Test—Each tube shall be subjected to the hydrostatic test, or a nondestructive electric test

Surface Condition
Finished tubes shall be free of scale. A slight amount of oxidation will not be considered as scale.

Product Marking
In addition to the marking prescribed in Specification A450/A450M, the marking shall include the name and order number of the purchaser.
Note: Material furnished under ASTM A179,ASME SA179 conform to the applicable requirements of the current edition of Specification A450/A450M

Application:
ASTM A179,ASME SA179 seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.


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