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:

锌合金材料，其硬度和防锈能力很差，就是厚电镀也容易褪色变黑和腐烂起泡，但其优点是易于做成复杂图案的零件，非常是压力铸造。市面所见的较复杂图案的锁具有很大可能是锌合金做的，消费者要仔细鉴别。

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.

铝或铝合金，普通铝合金(航空航天用除外)质软且轻、材料强度较底，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.

钢铁，强度较好，成本较低，但易于生锈，一般用作锁具内部结构材料使用，不宜作外部装饰件。

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.

铜材料用的比较少，通常用来制锁。

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

从耐用的角度看，好的材料应是不锈钢，尤其是用作表面材料，越用越光亮。其强度好、耐腐蚀性强、颜色不变。但不锈钢也有多种，主要可分为铁素体和奥氏体。铁素体不锈钢有磁性，俗称不锈铁，时间长，环境不好也会生锈，目前，只有304不锈钢才是好的不锈钢材料。

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.