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3004-O aluminum  lamp cap strip
    To make aluminum lamp cap, first stamping and then tapping into spiral shape, thinner materials and to withstand the pressure. Therefore, the 3004 lamp cap aluminum strip need to be with high mechanical strength and uniform microstructure and deep drawing property. Currently signi aluminum use the flat ingot hot rolling for producing blank holder with 3004-O aluminum alloy  lamp cap strip. To make this 3004 O aluminum lamp cap strip, we have to control the composition of the material and cast rolling process, the high temperature uniformity of annealing and final annealing process, it have good deep drawing quality, enough strength, good formability.

Chemical Composition
Alloy Si Fe Cu Mn Mg Cr Ni Zn Ti Other Aluminum
Each Total
3004 0.3 0.7 0.25 1.0-1.5 0.8-1.3 - - 0.25 - 0.05 0.15 Remainder

Temper Thickness mm Tensile Strength 
Rm MPa
Yield Strength 
Rp0.2 MPa
Elongation % 
Bend Radius Hardness HBWa
    min. max. min. max.   180° 90°  
O 0.2-0.3 155 200 60   13 0t 0t 45

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