Specifications:
Hindalco's spiral fin stock is an established product in the market for heat exchange applications. With the help of high-quality ingots, state-of-the-art gauge and shape control and precision slitting, we manufacture fin stock that has tight gauge tolerances and excellent slit edges. A tight build-up combined with sound internal metallurgical properties makes it suitable for all types of finning. The product meets the stringent specifications of globally competitive companies.
| Dimensions |
| Parameter |
Range |
Tolerance |
| Thickness (mm) |
0.30 — 0.45 |
+/-0.01 |
| Width (mm) |
10 — 25 |
+/-0.1 |
| Coil I.D. (mm) |
203, 250 |
- |
| Coil O.D. (mm) |
1350 max |
- |
| Mechanical properties |
| Alloy (AA) |
Temper |
%E (min)
(50mm gauge length) |
UTS (mpa) |
| Min |
Max |
| 1050 |
soft (O) |
30 |
55 |
95 |
| 1060 |
soft (O) |
30 |
55 |
95 |
| 1100 |
soft (O) |
30 |
70 |
110 |
| Chemical composition |
| Alloy (%) |
AA1050 |
AA1060 |
AA1100 |
| Fe |
0.40 |
0.35 |
0.95 |
| Si |
0.25 |
0.25 |
(Fe + Si) |
| Mg |
0.05 |
0.03 |
- |
| Mn |
0.05 |
0.03 |
0.05 |
| Cu |
0.05 |
0.05 |
0.05 — 0.20 |
| Zn |
0.05 |
0.05 |
0.10 |
| Ti |
0.03 |
0.03 |
- |
| Cr |
- |
- |
- |
| Each (Others) |
0.03 |
0.03 |
0.05 |
| Total (Others) |
- |
- |
0.15 |
| Al |
99.50 |
99.60 |
99 |
Slit quality
Free from nicks, cuts and heavy burrs.
Coil build-up
Uniform and tight enough to be handled horizontally.
Applicable standards
ASTM - SB -209M, Aluminium association — aluminium standards and data, Hindalco manufacturing limits (as applicable).
Packing
Spiral fin stock is placed on wooden skids in an eye-to-sky position. It is wrapped in HDPE fabric and hardboard and strapped with hoop iron. Moisture protection is ensured with silica gel packets and the entire packed product is placed in a wooden box.
Applications:
- Industrial heat exchangers