I am trying to find out some techincal information on corten steel. I need to have some studs made to match the material specs of ASTM A325 Type 3 fasteners. I can't find the tensile/yield strengths on corten steel. Does either Type A (ASTM A242) or Type B (ASTM A588 gr A) conform to those specs? Is there another kind of weathering steel which would work?