High dynamic loading means that a component is subjected to continually alternating periods of high and low stress. Examples of components that experience high dynamic loading are those used in hydraulic systems or those that experience high compressive loading. Cyclic loading can cause a component to fracture even if the stress amplitude is significantly below the materials ultimate tensile strength Rm. In many cases, components can fail even if at stress amplitudes below the 0.2% offset yield strength (Rp0.2). If a component is going to be exposed to a combination of load types, particular care is required when designing the component and when choosing the material to be used.