Metals–Iron–Steel Requests

Hello, I am looking for potential steel suppliers for our Machinery company in Brazil. We are interested in thick plates and tubes (squared and cylindrical). Appreciate any contact. My e-mail is r.***a@********.com.br and my cell phone is +55 ************

I need wear-resistant steel made in Turkey, analogue of Siddur 400,450,500. Which factories in Turkey produce such steel?