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Specifications
ASTM A179 Heat Exchanger and Condenser Seamless Steel Tubes and Pipes1.Seamless Boiler Tubes
2.Seamless Heat Exchanger Tube
ASTM A179 Heat Exchanger and Condenser Seamless Steel Tubes and Pipes
Standard: ASTM A179/A179M
Scope: Seamlss cold-drawn low carbon steel tubes for tubular heat exchangers, condensers, and similar heat exchanger apparatus.
Size Range: Covers tube 1/8 to 3 in.[3.2 to 76.2mm], inclusive, in outside diameter.
Chemical Composition& Mechanical Properties
Chemical analysis [%] | |||
C |
Mn |
S |
P |
0,06 - 0,18 |
0,27 - 0,63 |
≤ 0,035 |
≤ 0,035 |
Mechanical properties | |||
Rm min [MPa] |
ReH min [MPa] |
A [%] |
Hardness [HRB] |
325 |
180 |
35 |
72 max |
Tolerance for O.D. and W.T.(SA 450/SA450M)
O.D. inch (mm) |
+ |
- |
W.T. inch (mm) |
+ |
- |
<1”(25.4) |
0.10 |
0.10 |
≤1.1/2”(38.1) |
20% |
0 |
1”-1.1/2”(25.4-38.1) |
0.15 |
0.15 |
>1.1/2”(38.1) |
22% |
0 |
1.1/2”-2”(38.1-50.8) |
0.20 |
0.20 |
- |
- |
- |
2”-2.1/2”(50.8-63.5) |
0.25 |
0.25 |
- |
- |
- |
2.1/2”-3”(63.5-76.2) |
0.30 |
0.30 |
- |
- |
- |
3”-4”(76.2-101.6) |
0.38 |
0.38 |
- |
- |
- |
Note: Selection of tube material
Poor choice of tube material could result in a leak through a tube between the shell and tube sides causing fluid cross-contamination and possibly loss of pressure
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