尽管成品铝合金外壳价格普遍较贵，但购买数量不少。根据市场上的实际情况，成品铝合金外壳的质量不同，价格也随之波动。因此，在选购的时候，我们应该根据自己的实际情况来选择。

　　首先，我们来看一下在市面上常见的外壳材质。成品外壳主要包括铝合金、不锈钢、塑料和玻璃等。考虑到其价格、质量、使用寿命等因素，不锈钢外壳绝对是上乘之选。不锈钢外壳不但耐腐蚀、表面光滑、无异味，而且比较轻便、易于清洁，更重要的是外壳寿命较长，使用寿命达10年以上。铝合金外壳相对较轻，同时具有良好的散热性。但是铝合金外壳受潮易生锈，不耐腐蚀，容易变形，使用寿命很短。因此，我们应该根据自己的实际情况来选择。

　　另外，在选择外壳的时候，还要注意它的做工精良，外壳表面平滑光滑。好的外壳，不仅外观上好看，而且表面光滑，整体结构紧凑，表面无错误。检查外壳表面无毛刺、磨损、腐蚀，零件与外壳紧密吻合，无掉角、掉漆现象。

　　上述是关于成品铝合金外壳的选择要点，希望能够对大家的选择提供帮助。

　　Although the price of finished aluminum alloy housings is generally more expensive, the number of purchases is not small. According to the actual situation in the market, the quality of finished aluminum alloy housings is different, and the price fluctuates accordingly. Therefore, when choosing, we should choose according to our actual situation.

　　First of all, let's take a look at the common housing materials on the market. Finished housings mainly include aluminum alloy, stainless steel, plastic and glass. Considering the price, quality, service life and other factors, stainless steel housings are absolutely the best choice. Stainless steel housings are not only corrosion resistant, smooth surface, no odor, but also relatively lightweight, easy to clean, more importantly, the life of the housing is long, the service life is more than 10 years. Aluminum alloy housings are relatively light, but also have good heat dissipation. However, the aluminum alloy housing is prone to rust, non-corrosion, easy deformation, and the service life is short. Therefore, we should choose according to our actual situation.

　　In addition, when choosing the housing, we should also pay attention to its fine workmanship, the surface of the housing is smooth and smooth. A good housing not only looks good in appearance, but also has a smooth surface, compact structure, and no surface errors. Check that the surface of the housing has no burrs, wear, corrosion, parts and housing fit snugly, no corner, paint shedding.

　　The above is about the key points of choosing finished aluminum alloy housings. I hope it can help you with your choice.