5/16" Grade 100 500 Ft/Dr Black by PEERLESS CHAIN COMPANY. $2.99. Peerless-ACCO alloy chain is rugged, versatile, high-strength, low-weight chain manufactured from special analysis alloy steel. It is quenched and tempered before proof testing and the ultimate tensile strength is over twice that of ordinary steel chain. Tensile strength following heat treatment meets or exceeds all existing OSHA, Government, NACM and ASTM specification requirements.
The pascal is the SI derived unit of pressure, internal pressure, stress, Young's modulus and ultimate tensile strength, and is defined as one newton per square metre. It is named after the French polymath Blaise Pascal.
Steel has a great Plastic Range - Ultimate Tensile Strength = max stress matter withstands while being stretched or pulled before failing/breaking. Yield Point= stress when matter begins to deform plastically. Before yield point, it will deform elastically & will return to its original shape when the stress is removed. When yield point is passed, a fraction of the deformation will be non-reversible. Deflection= degree to which a structural element is displaced under a load.