ASTM B234
This specification covers aluminum-alloy drawn seamless round tube in straight lengths designated , for use in surface condensers, evaporators,and heat exchangers.Alloy and temper designations are in accordance with ANSI H35.1. The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A91060 for aluminum 1060, in accordance with Practice E 527.
Chemical Properties
| Alloy | Silicon | Iron | Copper | Manganese | Magnesium | Chromium | Zinc | Titanium | Other ElementsD | Aluminum | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Each | TotalE | ||||||||||
| 1060 | 0.25 | 0.35 | 0.05 | 0.03 | 0.03 | ... | 0.05 | 0.03 | 0.03F | ... | 99.60 minG |
| 3003 | 0.6 | 0.7 | 0.05–0.20 | 1.0–1.5 | ... | ... | 0.10 | ... | 0.05 | 0.15 | remainder |
| Alclad 3003 | 3003 alloy clad with 7072 alloy | ||||||||||
| 5052 | 0.25 | 0.40 | 0.10 | 0.10 | 2.2–2.8 | 0.15–0.35 | 0.10 | ... | 0.05 | 0.15 | remainder |
| 5454 | 0.25 | 0.40 | 0.10 | 0.50–1.0 | 2.4–3.0 | 0.05–0.20 | 0.25 | 0.20 | 0.05 | 0.15 | remainder |
| 6061 | 0.40–0.8 | 0.7 | 0.15–0.40 | 0.15 | 0.8–1.2 | 0.04–0.35 | 0.25 | 0.15 | 0.05 | 0.15 | remainder |
| 7072H | 0.7 Si + Fe | 0.10 | 0.10 | 0.10 | ... | 0.8–1.3 | ... | 0.05 | 0.15 | remainder | |
A Limits are in percent maximum unless shown as a range or otherwise stated.
B Analysis shall be made for the elements for which limits are shown in this table.
C For purposes of determining conformance to these limits, an observed value or a calculated value attained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with the rounding-off method of Practice E 29.
D Others includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in this specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaser establish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considered nonconforming.
E Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.
F Vanadium 0.05 max.
G The aluminum content shall be calculated by subtracting from 100.00 % the sum of all the metallic elements present in amounts of 0.010 % or more, rounded to the second decimal before determining the sum.
H Composition of cladding alloy as applied during the course of manufacture. The sample from finished tube shall not be required to conform to these limits.
Mechanical Properties
| Alloy | Temper | Wall Thickness, in. |
Tensile Strength, min, ksi |
Yield Strength, (0.2 % offset), min, ksi |
Elongation in 2 in., or 4 x Dia,C min, % |
|
|---|---|---|---|---|---|---|
|
Full-Section Specimen |
Cut-Out Specimen | |||||
| 1060 | H14 | 0.010–0.200 | 12.0 | 10.0 | ... | ... |
| 3003 | H14 H25 |
0.010–0.024 0.025–0.049 0.050–0.200 0.010–0.200 |
20.0 20.0 20.0 22.0 |
17.0 17.0 17.0 19.0 |
3 5 8 ... |
... 3 4 ... |
| Alclad 3003 | H14 H25 |
0.010–0.024 0.025–0.049 0.050–0.200 0.010–0.200 |
19.0 19.0 19.0 21.0 |
16.0 16.0 16.0 18.0 |
... 5 8 ... |
... 3 4 ... |
| 5052 | H32 H34 |
0.010–0.200 0.010–0.200 |
31.0 34.0 |
23.0 26.0 |
... ... |
... ... |
| 5454 | H32 H34 |
0.010–0.050 0.051–0.200 0.010–0.050 0.051–0.200 |
36.0 36.0 39.0 39.0 |
26.0 26.0 29.0 29.0 |
... ... ... ... |
5 8 4 6 |
| 6061 | T4 T6 |
0.025–0.049 0.050–0.200 0.025–0.049 0.050–0.200 |
30.0 30.0 42.0 42.0 |
16.0 16.0 35.0 35.0 |
16 18 10 12 |
14 16 8 10 |
Note:
A To determine conformance to this specification, each value for ultimate strength and for yield strength shall be rounded to the nearest 0.1 ksi and each value for elongation to the nearest 0.5 %, both in accordance with the rounding-off method of Practice E 29.
B The basis for establishment of mechanical property limits is shown in Annex A1.
C Elongation of full-section and cut-out sheet-type specimens is measured in 2 in., of cut-out round specimens, in 4 3 specimen diameter.
