Application of Standard ASTM A 255–07 to Calculate Hardenability of Steels Produced according to GOST 4543–2016

Abstract

The possibility of using standard ASTM A 255–07 is shown to assess the hardenability of structural steels manufactured in accordance with GOST 4543–2016. Inaccuracies of the standard are identified with respect to the correctness of correlation dependences. Significant additions and changes to the existing methodology have been made to the calculation of hardenability of structural steels with chemical composition in accordance with the GOST 4543–2016. Additional multiplying factors for calculating the hardenability of sparingly alloyed steels are established. It is shown that in the corrected form the method of hardenability calculation according to standard ASTM 255–07 is characterized by a good agreement of calculated and experimental data for a number of structural steels with chemical composition according to GOST 4543–2016. It is established that the comparative assessment of hardenability by the developed method should be carried out with the average chemical composition, as the data of hardenability given in GOST 4543–2016, do not correspond to the maximum and minimum composition of alloying elements, by which the hardenability is determined with the help of calculation method.

Keywords

• structural steels
• hardenability
• method of calculation