MECHANICAL COMPOSITION ( IN PERCENTAGE ) GradeTensileStrength Mpa, (Min)YieldStrengthMpa, (Min)%AgeElongationin 50mmgauge length minHardness (Max)BHNRb30151520540217953045152054020192304L4851704020192310S51520540217953165152054021795316L48517040217953175152053521795317L5152054021795321515205402179534751520540201924093801702017988409M4302752018790410S41520522183894104502052021789420700( max )–15217954304502052218389JSL AUS5152054021795JS- 2035152054021795301M5152054021795