New hot work tool steel from Uddeholm

Dievar is a premium chromium, molybdenum, vanadium alloyed steel which delivers excellent toughness and ductility in all directions, good temper resistance and good high temperature strength

Uddeholm Tooling, the tool and die steel specialist, has launched Dievar, a new hot work tool steel that again raises the industry standard in die materials.

Dievar is a premium high performance chromium, molybdenum, vanadium alloyed steel.

Manufactured using leading edge production and refining technology to achieve a unique property profile, Dievar delivers excellent toughness and ductility in all directions, good temper resistance and good high temperature strength.

Moreover, it exhibits excellent hardenability and good stability throughout heat treatment and coating operations.

Of key importance is that Dievar has been specifically developed to improve potential heat checking resistance beyond that of other commercially available die steels, thereby overcoming one of the most common failure mechanisms in die casting and forging operations.

Additionally, the outstanding toughness of Dievar can be exploited to achieve further gains in heat checking resistance by allowing a higher working hardness to be used without risk of gross cracking failure.

The higher working hardness coupled with good temper resistance offers improved resistance to hot wear and plastic deformation in tools using this steel.

Furthermore, Dievar is capable of maintaining its unique property profile even in the largest sections.

Its minimum unnotched impact value is 300 joules, while its minimum average Charpy V notch impact value is 19 joules according to testing procedures defined by NADCA #207-97.

With the launch of Dievar, Uddeholm maintains its established leadership in steel product development.

Dievar builds on Uddeholm's previous advances embodied in Orvar Supreme, premium grade H13 hotwork steel, which exhibits very high purity and fine structure, resulting in improved isotropic properties valuable for tooling subjected to high mechanical and thermal fatigue stresses.

And, QRO 90 Supreme, a hot work steel specially developed to provide excellent performance in high temperature tooling, and particularly suitable for the extrusion of non-ferrous metals and forging and extrusion of steel.

Uddeholm Tooling, based in Sweden, is one of the largest tool steel manufacturers in the world whose reputation for quality and skill in producing special steels stretches back over 300 years.

Uddeholm has been present in the U.K.

for more than 75 years, supplying both tool steels and precision strip steel.

In that time the company has developed a reputation for the quality of its service, not least because of its unique range of steels for most tooling applications.

Uddeholm has the resources to provide help in the selection and treatment of steels which can lead to improved economy in cost of production.

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