"Weathering" Steel Specifications:
ASTM A588
ASTM A709-50W
ASTM A242
ASTM A606 TYPE-4
ASTM A847
ASTM M270-50w
345
ASTM A572-50 (non-weathering)
ASTM A709-50 (non-weathering)
M270-50 (non-weathering)
50KSI MIN YIELD