A179/SA179 Seamless Carbon Steel Tubing , Heat Exchanger And Condenser Tubes , OD 6mm~88.9mm Wall Thickness 0.8mm~15mm
ASTM A179 / ASME SA179 standard 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 standard requires that the tubes be heat treated after the final cold drawn pass at a temperature of 1200°F [650°C] or higher.
Product Standard: A179/SA179
Main steel grades: A179/SA179
Application: For heat exchanger and condenser, conveying water, oil, gas and other common fluids
Chemical Requirements & Mechanical Properties:
| Standard |
Grade |
Chemical Composition |
Mechanical Properties |
Elongation |
| C |
Mn |
P.S |
TS Mpa |
YS Mpa |
(%) |
| ASTM A179 |
A179 |
0.06-0.18 |
0.27-0.63 |
≤0.035 |
≥325 |
≥180 |
≥35 |
| A179 Mechanical properties |
Tensile
Strength (Mpa) |
Yield
Strength (Mpa) |
Elongation
(%) |
Hardness
(HRB) |
| ≥325 |
≥180 |
≥35 |
≤72 |
Wall Thickness Tolerance:
| A179 Seamless, Cold-Finished Tubes |
Outside Diameter
In. (mm) |
Wall thickness Tolerance % |
| Over (+) |
Under (-) |
1 ½ (38.1)
and under |
20 |
0 |
| Over 1½ (38.1) |
22 |
0 |
Outside Diameter Tolerance:
| A179 Cold-Finished Seamless Tubes |
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 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:
| A179 Cold-Finished Seamless Tubes |
| Outside Diameter |
Cut Length, in.(mm) |
| 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 apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater 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 thereof over 24 ft or 1⁄2 in. [13 mm], whichever is the lesser. |
Delivery status: Annealed, normalized, normalized+Tempered, etc.
Inspection and Test: chemical composition test, mechanical properties test(tensile, yield, elongation), process properties test(flatting, flaring, bending, hardness, impact, etc.), appearance and size test, non-destructive inspection test, hydrostastic test.
Surface treatment: oil impregnation, paint, passivation, phosphating, shot blasting etc.
Packing: Exporting package/wooden box /as requirement.
Mark: As required.
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