To fit within its expanding high-strength steel product line, the company has changed the branding of its namesake product to ChrōmX 9100 (Grade 100) and 9120 (Grade 120) rebar, both sold under the ASTM A1035 specification. ChrōmX 9000 bar provides high strength with ductility, as well as high corrosion resistance—five times more than standard carbon steel—outperforming epoxy-coated and galvanized rebar for corrosion protection, product engineers contend. They attribute the high performance features to the steel’s chemistry and unique microstructure; absent damage-prone coatings, ChrōmX 9100 and 9120 can be handled and fabricated just like conventional rebar.
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AASHTO LRFD specs invite Grade 100 reinforcement
The 2013 Interim Revisions of the American Association of State Highway and Transportation Officials Load and Resistance Factor Design (LRFD) Bridge Design Specifications allow reinforced concrete bridges to be designed using high-strength reinforcing steels up to a 100 ksi yield, such as MMFX2 (AASHTO MP18/ASTM A1035 Grade 100 [690 MPa]).
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