This standard outlines the method for tensile testing of metallic materials at room temperature to determine essential mechanical properties such as yield strength, tensile strength, and percentage elongation.
Specifies the method for tensile testing of metallic materials at room temperature.
Quick Reference Values
standard testing temperature10 °C to 35 °C
strictly controlled temperature23 ± 5 °C
proportional gauge length factor5.65
alternative gauge length factor11.3
Key Formulas
L0 = 5.65 * √S0 — Standard proportional gauge length
Rm = Fm / S0 — Tensile strength (where Fm is maximum force)
A = ((Lu - L0) / L0) * 100 — Percentage elongation after fracture
Practical Notes
Ensure the extensometer is accurately calibrated and firmly attached to prevent slippage during testing, which could result in an inaccurate yield point.
Loading rate must be strictly controlled according to the standard, especially within the elastic range, to ensure reliable yield strength results.
When preparing machined test pieces, ensure smooth transitions at the shoulders to avoid stress concentrations and premature failure outside the gauge length.