Generally, when purchasing roller shutter doors,  Here, we remind you that it is important to understand the performance of roller shutter door manufacturing materials. Roller shutter door manufacturing materials usually include the following:

鋅合金材料，其硬度和防銹能力很差，就是厚電鍍也容易褪色變黑和腐爛起泡，但其優點是易于做成復雜圖案的零件，特別是壓力鑄造。市面所見的較復雜圖案的鎖具有很大可能是鋅合金做的，消費者要仔細鑒別。

Zinc alloy material has poor hardness and anti rust ability. Even thick electroplating is easy to fade, blacken, rot and blister, but its advantage is that it is easy to make parts with complex patterns, especially pressure casting. The locks with more complex patterns seen in the market may be made of zinc alloy. Consumers should carefully identify them.

鋁或鋁合金，普通鋁合金(航空航天用除外)質軟且輕、材料強度較底，但易于加工成形。

Aluminum or aluminum alloy, ordinary aluminum alloy (except for Aerospace) is soft and light, with low material strength, but easy to process and form.

鋼鐵，強度較好，成本較低，但易于生銹，一般用作鎖具內部結構材料使用，不宜作外部裝飾件。

Steel has good strength and low cost, but it is easy to rust. It is generally used as the internal structural material of lock, and is not suitable for external decoration.

銅材料用的比較少，通常用來制鎖。

Copper is rarely used and is usually used to make locks.

從耐用的角度看，好的材料應是不銹鋼，尤其是用作表面材料，越用越光亮。其強度好、耐腐蝕性強、顏色不變。但不銹鋼也有多種，主要可分為鐵素體和奧氏體。鐵素體不銹鋼有磁性，俗稱不銹鐵，時間長，環境不好也會生銹，目前，只有304不銹鋼才是好的不銹鋼材料。

From the perspective of durability, a good material should be stainless steel, especially as a surface material, the more it is used, the brighter it will be. It has good strength, strong corrosion resistance and unchanged color. However, there are many kinds of stainless steel, mainly including ferrite and austenite. Ferritic stainless steel is magnetic, commonly known as stainless iron. It will rust for a long time and in a bad environment. At present, only 304 stainless steel is a good stainless steel material.