Table 5: Properties of screw-thread steels.

Label of specimenYield strength (MPa)Ultimate strength (MPa)Yield strain ()Elastic modulus (MPa)

6–146065722892.01 × 105
6–246365123032.01 × 105
6–345363822542.01 × 105
Average value of 6 mm459 ± 3.7649 ± 72282 ± 18.72.01 × 105
8–145765422742.01 × 105
8–243863321792.01 × 105
8–344865122292.01 × 105
Average value of 8 mm448 ± 6.3646 ± 8.72227 ± 32.32.01 × 105