what is the definition of ksi mean in steel
ksi is a hybrid term taking the SI prefix kilo (1000) and sticking it onto the imperial pounds force per square inch. One of the properties of a metal is its Ultimate Tensile Strength (UTS) e.g. the UTS of mild steel is 470 MPa. 1 megapascal (MPa) = 1 newton per square metre. From the UTS of a metal, you can calculate the force required to break it, which enables you to design a product to survuve a given load.