Hot Stamping

Until recently, cold forming was the dominating method for making critical structural components in high strength steel. This has been supplemented by hot stamping, the new game-changing process which places new demands on the tool steel used in the process.

Material selection for Hot Stamping

By using a heated blank that forms and hardens quickly in the die, parts can be made larger, stronger and more complex than before. This, however, places severe demands on the tool steel used in the dies. For instance, to function reliably at the temperatures required, the tool steel needs to have excellent thermal conductivity and hot yield strength as well as high toughness and ductility.

ASSAB’s tooling solutions for such exacting demands are several: QRO 90 Supreme, Unimax, Dievar and ASSAB 8407 Supreme. They all offer predictable tool performance, longer production runs, shorter cycle times and superior end products.

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UNIMAX	Unimax is a high hardness electroslag remelted tool steel which provides great wear resistance even over extended time at elevated temperatures. This product is suitable for coating and nitriding. Unimax performs very well in precision forging, hot stamping and moulding of reinforced plastics.
ASSAB 8407 SUPREME	ASSAB 8407 Supreme is our trusted premium H13 steel for all kinds of hot work tool applications. Proven over and over again ASSAB 8407 Supreme has stood the test of time and remains well known in the tooling industry for its high and reliable performance and ease of maching. In markets served by Uddeholm, ASSAB 8407 Supreme is promoted as Orvar Supreme.
DIEVAR	Dievar is ASSAB’s premium steel developed for the demanding application of High pressure die casting. It is the industry benchmark for as the high performance steel for the longest tool life and lowest crack risks due to its superior toughness and ductility. Apart from die casting it has proven itself as a great tool steel for other applications such as forging, extrusion and hot stamping.
QRO 90 SUPREME	QRO 90 Supreme is an electro slag remelted steel suitable for applications such as hot stamping, brass forging, die casting core inserts and brass extrusion. With its outstanding thermal fatigue resistance, thermal conductivity and temper back resistance QRO 90 Supreme excels as a tool steels where tools tempers down quickly to lower hardness.