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The hardness required for chain sprockets is typically in the range of 40-50 HRC (Rockwell Hardness Scale). This hardness level ensures that the sprocket is durable and wear-resistant to guarantee a longer service life under heavy loads and constant chain engagement.
The smallest sprocket is usually referred to as the "cog" and is commonly found on the rear wheel of a bicycle. It is designed to mesh with the chain and is typically the one with the fewest number of teeth among all the sprockets on the bike.
A grade 2 washer typically has a hardness ranging from 80-100 Brinell. This hardness level makes it suitable for general-purpose applications where high strength is not required.
According to the USP (United States Pharmacopeia), the hardness requirement for tablets is typically specified as a minimum force required to crush the tablet. This is often expressed in terms of kiloponds or newtons. The specific hardness requirement may vary depending on the formulation and purpose of the tablet.
Typically, 12560 armor steel has a hardness level of around 477-534 HB (Brinell hardness). This makes it suitable for use in armoring applications where high hardness and strength are required to provide protection against ballistic threats.
The full form of HRC is Rockwell Hardness C Scale. It is a measure of the hardness of a material, typically metals, determined by how much force is required to create an indentation on the surface of the material.