From a durability perspective, stainless steel is the best material, especially as a surface material, becoming shinier with use. It boasts good strength, strong corrosion resistance, and colorfastness. However, there are various types of stainless steel, mainly divided into ferritic and austenitic.
Steel Plate + Cement
Commonly known as a cement safe, this is typically used in low-priced safes. According to national standards, it is constructed with a steel plate at least 3mm thick and a foamed cement inner cavity. These safes are relatively heavy due to the cement, but are also easily damaged by drills, losing their anti-theft function. Due to intense competition, some unscrupulous vendors use specially treated iron plates to cover the cement, making it easily drillable and offering very low anti-theft capabilities. Not recommended for purchase.
Steel
Steel is a popular material on the market, and many safes use it. It comes in ordinary low-carbon steel plates and low-carbon alloy steel plates. Most safes use low-carbon steel plates, offering slightly weaker anti-theft performance. Most safes made with low-carbon alloy steel plates have passed the national 3C mandatory certification. The thicker the steel plate, the heavier the safe; the thickness should be at least 6mm. Thicker safes offer better anti-theft performance.
Plastics
The plastics used in safes are not ordinary plastics, but special materials containing molten aluminum, ceramics, and mineral blocks. Due to industry requirements, they can simultaneously provide fire resistance and anti-theft functions. They were developed in 1990 by Chap, the UK's largest safe manufacturer.
