Harsco Expands Relationship with AK Steel; Adds New Services Contract to Support Mansfield Works

• Seven-year agreement for onsite services marks a significant win for Harsco in U.S. steel market

CAMP HILL, Pa. – (February 15, 2018) – Harsco Corporation (NYSE: HSC) today announced that its Metals & Minerals division has expanded its business relationship with AK Steel, a leading U.S. producer of flat-rolled steel products. The agreement calls for the use of Harsco’s innovative ScrapMaster™ program for scrap management services including inbound scrap handling and inspection, basket preparation and hauling, and delivery route maintenance at AK Steel’s Mansfield, Ohio site. Harsco also currently provides similar services at AK Steel’s site in Butler, Pennsylvania.

Harsco Metals & Minerals Chief Operating Officer Chris Whistler pointed to the AK Steel contract expansion as both a key step in Harsco’s overarching growth strategy, as well as confirmation of its commitment to customer service and satisfaction. “This new contract further increases our presence in the United States, which will prove invaluable as U.S. economic growth positively impacts stainless steel consumption,” he said. “Significantly, this new agreement signals AK Steel’s confidence in our ability to deliver on our promises. We could not be more pleased to have the opportunity to further build on this already longstanding relationship.”

Located in north central Ohio, AK Steel’s Mansfield Works includes production of specialty flat-rolled stainless steels that meet the demands of an array of complex end-use applications, such as automotive fuel and safety systems, appliances, cutlery, HVAC equipment, and processing equipment.

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About Harsco Corporation

Harsco Corporation is a diversified industrial company providing a range of onsite services and engineered products to the global steel, energy and railway sectors. Harsco’s common stock is a component of the S&P SmallCap 600 Index and the Russell 2000 Index. Additional information can be found at www.harsco.com.

Harsco’s Metals & Minerals division is the largest and most comprehensive provider of onsite material processing and environmental services to the worldwide metals industry, with operations at approximately 140 customer sites across more than 30 countries. The division is a technology partner to cleaner, more efficient metal production, providing customers with economically and environmentally viable solutions for the treatment and reuse of production waste streams.