http://www.mesteel.com/qualities/equivalentscs.htm

You can check this link above, you can find the steel grad you're looking for, and the equivalent standard, then it's gonna be easy to defines its properties

Hicham Farid, Inj PhD

thanks Farid. but mentioned link has not any information about triaxial stress- fracture strain curve.

best regard

Dear Farid

also i followed the link, it does not include this data

Saeed Farahi Shahri ... Please check references below.. hope it will be helpful for you…

Regards…

https://books.google.iq/books?id=kmlQDwAAQBAJ&pg=PA342&lpg=PA342&dq=Triaxial+Stress+-+Fracture+Strain+curve+for+steel+ST37&source=bl&ots=FrT6QIEV0E&sig=uMW_57BngDk3LjNmDPq2jJMutHM&hl=ar&sa=X&ved=2ahUKEwjQoO74o7beAhUpLcAKHTlhB-cQ6AEwC3oECAQQAQ

Dear Saeed

Did you figure triaxial stress out for ductile damage modeling?

Please explain how to find it?

This is what am looking for

Dear Saeed Farahi Shahri

It is suggested to read following papers.

Article Two novel corrugated web reduced beam section connections fo...

Article Analytical study of the seismic performance of all-steel buc...

Article Development of a novel haunched link for eccentrically braced frames

Another fracture strain-stress triaxiality relation is also presented in the following paper based on the previous research works.

Article Simplified shear force-chord rotation relationship for concr...