we have obtained ISO 9001, ISO 14001, ISO 45001, CE, AAA-level credit rating certification, etc.
we have obtained ISO 9001, ISO 14001, ISO 45001, CE, AAA-level credit rating certification, etc.
The standard specification covering minimum-wall-thickness cold-drawn low-carbon steel tubes for tubular heat exchange, condensers, and similar heat transfer apparatus. This specification cover tubes 1/8″ to 3″ [3.2 mm to 76.2 mm], inclusive, in outside diameter. The ASTM A179 tubes shall be made by the seamless process and shall be cold drawn; and they shall be heat treated after the final cold draw pass at a temperature of 1200°F [650°C] or higher. These seamless tubes are usually called as low-carbon steel tubes, heat exchange tubes, boiler tubes, etc.
Specification
Size Range：OD:1/4" (6.25mm) to 8" (203mm), WT 0.02" (0.5mm) to 0.5"(12mm)
Outer Diameter：10 MM – 38.1 MM
Wall Thickness：1 MM – 10 MM
Length：3000 MM – 16000 MM,Single Random, Double Random & Required Length, Custom Size – 12m lengths
Ends:Plain end or beveled end, square cut, burr free ,Plastic Cap at Both end
Process:Cold drawn, Cold rolled, Hot Rolled
Wall Thickness Tolerance：
|
Seamless Cold-Finished Tubes |
||
|
Outside Diameter |
Wall thickness Tolerance % |
|
|
Over (+) |
Under (-) |
|
|
1 ½ (38.1) and under |
20 |
0 |
|
Over 1½ (38.1) |
22 |
0 |
Chemical Composition
|
Element |
Weight Percent |
|
C |
0.06~0.18 |
|
Mn |
0.27~0.63 |
|
P |
≤0.035 |
|
S |
≤0.035 |
*All values shall be based on heat analysis.
Mechanical Properties
|
T.S. min. |
47 [325] |
|
Y.S. min. |
26 [180] |
|
El. in 2" |
35 |
|
Hardness, |
72 |
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