What is the value of permissible stress for steel wire for the diameter of branding wire of 0.5-1.2 mm?

Permissible stress for steel wire, especially for applications such as branding wire with diameters ranging from 0.5 to 1.2 mm, varies depending on several factors, including the type of steel used, the manufacturing process, and the specific standards or codes applicable to the wire’s intended use.

Generally, in structural engineering, permissible stress (also known as allowable stress) is the maximum stress that materials can safely withstand. It is determined based on the material’s yield strength or ultimate strength, divided by a factor of safety. The factor of safety ensures that the material does not reach its yield point under working loads, providing a margin for unknown stresses, inaccuracies in the load estimations, and imperfections in the material.

For steel wire, the permissible stress is often defined in standards such as ASTM A228 for music wire or ASTM A401 for high-tensile strength, chromium-silicon alloy steel wire. However, these standards do not explicitly give a permissible stress value because it also depends on how the wire is going to be used (tension, compression, bending, etc.), environmental conditions, and other factors.

As a rough estimate, the tensile strength of high-carbon steel wire (which is commonly used for branding and similar applications) can range from 1800 to 2500 MPa. The permissible stress could be a fraction of this value, depending on the intended use and the factors mentioned earlier. For a precise value, one would need to consult the