Brinell hardness (HB) is generally used when materials are softer, such as steel before heat treatment or after annealing. Rockwell hardness (HRC) is generally used for materials with higher hardness, such as hardness after heat treatment, and so on.Q355D hot-rolled steel plate hardness 140-190HBHar

Corrosion resistance of 300 series stainless steelThe 300 series stainless steel is highly favored due to its excellent performance and wide range of applications. It has excellent corrosion resistance in humid, acidic or alkaline environments and is suitable for fields such as marine engineering, c

The main chemical composition characteristics of 300 series stainless steel:Chromium (Cr): Chromium is one of the most important elements in the 300 series stainless steel, which can form a dense oxide film to protect stainless steel from corrosion. The chromium content in 300 series stainless steel

The tooth top height coefficient is a variable or fixed value that depends on the type, design requirements, and purpose of the gear.Firstly, the tooth top height coefficient (usually represented by the symbol ha *) is the ratio of the gear tooth top height to the modulus, i.e. h α/m. It reflects th