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Published: July 2007      

A new steel grade for container cranes?

A recently developed, weathering steel grade could be ideal for structures such as container cranes, which are exposed to fatigueloading and corrosive and/or cold environments. The steel was developed by Northwestern University (NWU), in Evanston, Illinois, in co-operation with Inland Steel Company (now part of Mittal Steel USA), and with support from the Federal Highway Administration and the Illinois DoT.

NUCu 70W (Northwestern University Cu-Precipitation-Strengthened) steel, now standardised ASTM A710 Grade B steel, is a copper-precipitation-hardened, high-performance Grade 70 weathering steel. Its properties were described earlier this year in the Chicago-based, specialist publication, Modern Steel Construction, the AISC journal....


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