Yield strength is the stress level at which a material begins to deform permanently.

The point at which material (under applied pressure) will change its form and not return to its original condition, typically measured in pounds per square inch (PSI).

The minimum stress at which a material will start to physically deform without increase in load.

The stress at which a material exhibits a specified limiting deviation from the proportionality of stress to strain during tensile testing.

The stress at which a material exhibits a specified limiting permanent strain.

The stress a material can withstand without permanent deformation.

 - The force required to stretch a material.

 The engineering stress at which, by convention, it is considered that plastic elongation of the material has commenced.

The stress (load/area) at which the metal changes from elastic to plastic in behavior, i.e., takes a permanent set.

The amount of strain that a material can undergo before moving from elastic deformation into plastic deformation. The stress felt by a material given a certain strain is defined by linear relationship, with a slope defined by the m Young's modulus

The stress at which a material exhibits a specified deviation is usually 0.2% for most metals. A general term or property, preferred to yield point.

is the engineering stress at which the permanent elongation of the sample has begun.

The maximum load that can be safely applied to a frame material without risk of permanent damage.

The stress (load) at which a Material elongates or stretches enough that after removal or release of this stress the material will not return to its original length or size, usually expressed in ksi.

The point at which stress on a material means that some of the deformation of the material is permanent and non-reversible.

The minimum stress at which a material will start to physically deform without further increase in load.

Indication of maximum stress that can be developed in a material without causing plastic deformation. It is the stress at which a material exhibits a specified permanent deformation and is a practical approximation of elastic limit. Offset yield strength is determined from a stress-strain diagram. It is the stress corresponding to the intersection [..]

Stress at which a material exhibits a specified limiting deviation from the proportionality of stress to strain, as defined by ASTM.