Jamali, Abdul Rauf, Waseem Khan, Ali Dad Chandio, Zubai Anwer, & Muhammad Hayat Jokhio. " Effect of Cryogenic Treatment on Mechanical Properties of AISI 4340 and AISI 4140 Steel." Mehran University Research Journal of Engineering and Technology [Online], 38.3 (2019): 755-766. Web. 23 Nov. 2024