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22. October 2018

Steeltec collaborates with DEW to generate synergy benefits: Steeltec’s special bainite steel HSX® Z12 now available in larger dimensions

Steeltec has extended the size range of its high-strength special steel HSX® Z12 and is now also supplying the material with bar diameters in the 60–80 mm range. By offering this grade of bainitic steel – with its attractive combination of mechanical and technical properties – in new larger bar sizes, the specialist bright steel producer has responded to the needs of manufacturers that fabricate large-scale components used, for example, in trucks and ships. Compared with conventional quenched and tempered steels, HSX® Z12 exhibits high strength, toughness and excellent machinability even in its as-delivered state. The base material is produced by Deutsche Edelstahlwerke (DEW), an affiliate of Steeltec within the SCHMOLZ + BICKENBACH Group. The collaboration has enabled Steeltec to expand into new fields. 

HSX®  Z12 combines the apparently opposing properties of tensile strength, toughness and machinability in a single steel. Steeltec designed the bainite special steel as a replacement for Q&T steels such as 42CrMo4 and 30CrMoV9 and component manufacturers are now appreciating the benefits of using peeled HSX®  Z12. Customers working with HSX®  Z12 achieve excellent machining performance compared with conventional steels of similar hardness. And because additional heat treatment and downstream processing operations are no longer required, customers benefit from more efficient production processes and improved component performance.

Until recently, Steeltec supplied HSX®  Z12 in diameters ranging from 18 mm to 60 mm. The company has now begun supplying HSX®  Z12 bar stock with diameters of up to 80 mm. These large-diameter bars are suitable for larger components, such as shafts or the heavy-duty fasteners used in mechanical drive systems, trucks and ships.

Synergy-driven progress

The larger steel bars with diameters greater than 60 mm are being produced by the Steeltec affiliate Deutsche Edelstahlwerke (DEW) at its specialty production plant in Siegen. As a result, Steeltec is now being supplied with semi-finished stock from two production facilities within the SCHMOLZ + BICKENBACH Group: from Swiss Steel in Emmenbrücke, Switzerland and from DEW in Siegen, Germany. For Steeltec, this has meant a further expansion in its production of higher strength special steels.

The mechanical properties of HSX® Z12:
Tensile strength Rm:               950–1,200 MPa
Yield strength Rp0,2:                at least 800 MPa
Elongation after fracture A5:   at least 12%