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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 |
| 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 |
| 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) |
| 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.
