Toughness Parameter Analysis of Low Alloy Steel Based on Tension Test

Seven hundred sets of data from tension and impact test of low alloy steel were analyzed.Resultsindicate that tension strength- plasticity parameter and impact toughness are correlative. Strength ratio SR is proposed as a new toughness parameter based on the above analysis. The relation of strength ratio and impact toughness of low alloy steel can be expressed as KV₂=-83.413 67+61.471 08·R_m/R_p0.2·(1-Z) or KV₂=-221.538 54+286.857 87·ln/R_m/R_p0.2·(1-Z).