Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
Standard of implementation： ASTM A179/ A179M/ASME SA-179/ SA-179M
Application: the manufacture of boiler water cooling wall, coal heater, steam heater and steam pipe.
Major grade: SA179, etc. through consultation, can also supply other special grade of steel pipe
Chemical composition and mechanical properties：
|
Standard |
Steel grade |
Chemical constituents (%) |
Mechanical properties |
Elongation(%) |
|||
|
C |
Mn |
P.S |
Tensile strength (MPa) |
Yield strength(MPa) |
|||
|
ASTM A179 |
A179 |
0.06 ～ 0.18 |
0.27 ～ 0.63 |
≤ 0.035 |
≥ 325 |
≥ 180 |
≥ 35 |
Dimensional tolerance：
|
Type of steel tube |
Outside diameter（D） |
Wall thickness（S） |
||
|
Outside diameter（mm） |
Deviation（mm） |
Outside diameter（mm） |
Deviation（mm） |
|
|
Hot rolling tube |
≤101.6 |
+0.4～-0.8 |
76～168.3 |
+28%～0 |
|
>101.6～168.3 |
+0.4～-1.2 |
|||
|
Cold drawn pipe |
＜25.4 |
+0.10 |
≤38.1 |
+20%～0 |
|
25.4～38.1 |
+0.15 |
|||
|
>38.1～＜50.8 |
+0.20 |
>38.1 |
+22%～0 |
|
|
50.8～＜63.5 |
+0.25 |
|||
|
63.5～＜76.2 |
+0.30 |
|||
|
76.2～101.6 |
+0.38 |
|||
|
>101.6～190.5 |
+0.38～-0.64 |
|||
|
>190.5～228.6 |
+0.38～-1.14 |
|||
