Specifications:
Hindalco's lamp cap stock combines strength and high formability with high resistance to softening in vitriting. Manufactured at modern and well-equipped mills, it can be rolled to very fine tolerances, allowing more caps per tonne of coil and enabling uninterrupted operations of high-speed forming presses.
| Dimensions |
| Parameter |
Stock for bulb caps |
Stock for Tube caps |
| Range |
Tolerance |
Range |
Tolerance |
| Thickness (mm) |
0.25 — 0.40 |
+/-0.02 |
0.30 — 0.40 |
+/-0.02 |
| Width (mm) |
50 — 500 |
+/-0.30 |
50 — 500 |
+/-0.30 |
| Coil I.D (mm) |
without core 203 |
- |
without core 203 |
- |
| Coil density (kg/mm) |
1.80 max |
- |
1.8 max |
- |
| Mechanical properties |
| Type |
Alloy (AA) |
Temper |
UTS (mpa) |
%E (min)
(50 mm gauge length) |
| Min |
Max |
Stock for
bulb caps |
L8S* |
O |
170 |
205 |
13 |
| 3004 |
O |
150 |
200 |
13 |
| 5251 |
O |
165 |
210 |
13 |
Stock for
tube caps |
8011 |
H14 |
125 |
160 |
1 |
| H16 |
150 |
180 |
1 |
| *L8S is a Hindalco innovation |
| Chemical composition |
| Alloy (%) |
Stock for bulb caps |
Stock for tube caps |
| L8S |
AA 3004 |
AA 5251 |
AA 8011 |
| Fe |
0.70 |
0.70 |
0.50 |
0.60 — 1.00 |
| Si |
0.30 |
0.30 |
0.40 |
0.50 — 0.90 |
| Mg |
1.20 — 1.60 |
0.80 — 1.30 |
1.80 — 2.40 |
0.05 |
| Mn |
0.80 — 1.30 |
1.00 — 1.50 |
0.10 — 0.50 |
0.20 |
| Cu |
0.10 |
0.25 |
0.15 |
0.10 |
| Zn |
0.25 |
0.25 |
0.15 |
0.10 |
| Ti |
- |
- |
0.15 |
0.08 |
| Cr |
0.25 |
- |
0.15 |
0.05 |
| Each (Others) |
0.05 |
0.05 |
0.05 |
0.05 |
| Total (Others) |
- |
0.15 |
0.15 |
0.15 |
| Al |
Remainder |
Remainder |
Remainder |
Remainder |
Surface quality
Surface has a corrosion resistant oil coating.
Applicable standards
ASTM - B - 209M, Aluminium association — aluminium standards and data, Hindalco manufacturing limits (as applicable).
L8S is a Hindalco innovation.
Packing
Lamp cap stock is placed on wooden skids in an eye-to-wall 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 :
- GLS lamps and tube lights