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Standard
ASTM A179/A179M
ASTM A179 / A179M - 90a Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
This specification covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. Tubes shall be made by the seamless process and shall be cold drawn. Heat and product analysis shall be performed wherein steel materials shall conform to required chemical compositions of carbon, manganese, phosphorus, and sulfur. The steel materials shall also undergo hardness test, flattening test, flaring test, flange test, and hydrostatic test.
Note:
(1) Mill test certificates will be issued according to EN10204.3
(2) All tubes shall be supplied as per applicable ASTM Specification.
(3) The tubes Shall be Seamless and the testing shall be as per A 450 / A450M.
Specifications
OD(mm) |
Wall Thickness Unit(mm) |
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2 |
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
6 |
6.5-7 |
7.5-8 |
8.5-9 |
9.5-10 |
11 |
12 |
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Φ25-Φ28 |
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Φ32 |
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Φ34-Φ36 |
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Φ38 |
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Φ40 |
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Φ42 |
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Φ45 |
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Φ48-Φ60 |
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Φ63.5 |
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Φ68-Φ73 |
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Φ76 |
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Φ80 |
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Φ83 |
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Φ89 |
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Φ95 |
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Φ102 |
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Φ108 |
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Φ114 |
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Φ121 |
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Φ127 |
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Φ133 |
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Φ140 |
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Φ146 |
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Φ152 |
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Φ159 |
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Φ168 |
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U-Bend Fabrication Tolerances
Item |
Condition (when) |
Tolercance |
|
Nominal bend radius ≤ 2 x nominal OD |
less than or equal to 12% |
Ovality |
2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD |
less than or equal to 10% |
|
Nominal bend radius > 4 x nominal OD |
less than or equal to 5% |
|
Nominal bend radius ≤ 2 x nominal OD |
0.75 x nominal wall |
Mimimum wall thickness |
2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD |
0.8 x nominal wall |
|
Nominal bend radius > 4 x nominal OD |
0.9 x nominal wall |
|
Nominal bend radius ≤ 8" (200mm) |
+/-3/64"(1mm) |
Bending Radius |
8" (200mm) < Nominal bend radius ≤ 16" (400mm) |
+/-1/16"(1mm) |
|
Nominal bend radius >16" (400mm) |
+/-5/64"(1mm) |
Disrance between legs |
|
Max 1/16"(1.5mm) |
Wall thinning of bending area |
|
Max 17% |
Difference between leg lengths at the ends |
Leg length ≤ 16' (4.88m) |
+1/8"(3mm) |
Leg length > 16' (4.88m) |
+3/16"(5mm) |
|
Deviation from plane of bend |
|
≤ 3/16"(1.5mm) |
Flattening on bend |
|
≤ 10% nominal diameter |
Straight leg length |
≤5m |
+1/8"(3mm) |
>5m |
+3/16(5mm) |
|
Total tube length including radius |
≤6m |
+3/16(5mm) |
>6m |
+5/16"(8mm) |
Chemical Composition
C |
Mn |
P≤ |
S≤ |
Si≤ |
0.06-0.18 |
0.27-0.63 |
0.035 |
0.035 |
0.25 |
Mechanical Properties
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
≥180 |
≥325 |
≥35 |
Material Comparison Tables
ASTM |
UNS NO. |
KOREA/JAPANES |
GERMAN |
BRITISH |
BELGIAN |
FRENCH |
ITALIAN |
|||||||||||||
KS/JIS Symbol |
KS/JIS Numbe |
Re |
DIN Type |
DIN |
Materiral |
Re |
B.S |
B.S Grade |
Re |
NBN Type |
NBN Grade |
Re |
AF |
NF |
Re |
UNI Type |
UNI |
Re |
||
ASTM A179 |
K01200 |
STBH 340 / STB 35 |
D3563 / G3461 |
|
St 35.4 |
1629 |
1.0309 |
|
3606 |
CFS 320 |
|
D 37-2 |
629 |
(3b) |
TU 37 C |
A49-215 |
(3a) |
C 14 |
5462 |
|
|
|
|
|
St 35.8 |
17175 |
1.0305 |
Plus |
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