Philippi-Hagenbuch offers SSAB Hardox HiTemp steels for hot slag applications

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Off-highway truck customization company Philippi-Hagenbuch (PHIL) is offerng the SSAB Hardox HiTemp steel in its customized hot slag bodies, part of their lineup of specialty HiVol truck bodies. The new steel is specially designed to withstand extreme temperature environments. As part of PHIL’s hot slag bodies, it reduces necessary plate thickness while maintaining the product’s service life for increased productivity in processing applications.  

PHIL’s hot slag body is comprised of two components — an exoskeleton superstructure, which does not come in contact with molten material, and load containing pieces that do. These pieces form an overlapping structure that is loosely strapped around the body of the exoskeleton to contain the hot slag during operation. This design allows for differential expansion and contraction, where a traditional body would buckle under such extreme heat. When transporting molten material, the pieces expand and contract without breaking welds, binding up or warping. When a piece is damaged or worn out, it can be replaced without any structural welding requirements.

The new HiTemp material improves the wear-resistant properties of a 450 Brinell steel, currently used in the hot slag body, while providing the same impact, welding and machining properties as the Hardox 450 material preferred by PHIL for heavy-duty applications. It is capable of transporting materials in excess of 1,200 degrees Fahrenheit (648.9 degrees Celsius). This allows PHIL to use a thinner plate without jeopardizing the product’s service life, providing more payload when fully loaded. Additionally, the thinner plate lowers the overall weight of the truck when traveling empty to save on fuel and reduces CO2 emissions.

PHIL has used Hardox material exclusively in its range of custom products, including truck bodies, water tanks and trailers, since 1983. As technology has advanced in SSAB’s steel-making process, PHIL employed harder versions of the Hardox material, starting with Hardox 400 and moving to Hardox 450 in 2000, standardizing on one specific grade along the way. 

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