Different grades of steel are used for construction of cranes. For example, you can use bridge steel. For specific brands and standards, you need to look at the local steel grade guide. It is better to choose the brand of steel that is on sale. I wish you success!

Thanks for your help.

Dear Behrouz,

Strenx 1100MC high-strength steel (minimum yield strength 1100 MPa, tensile strength 1200---1350 MPa, impact 27 j, cold forming, with composition carbon 0.15%, Si 0.5 %, Mn 1.8 %) can be used for mobile crane. You can use site to check data sheet as reference about the steel

http://www.aemach.com/strenx/pdf/Data_sheet_2019_Strenx_1100_MC_2016-03-31_65_371857150_en.pdf

Hope it is helpful for you.

Ashish

Thanks for your help.