Light as a feather for high-flying performance

46MnVS5 – a new weight-optimised material

The materials developed at GMH Gruppe are selected carefully for their potential to help its clients in the automotive industry. Take the higher-strength steel 46MnVS5, for example: this innovative material can reduce the weight of a car’s conrod by around ten percent.

It is also easy to work, has a long service life and presents no problems in terms of shipping. Thanks to these qualities, 46MnVS5 is the perfect material for higher-performance crack conrods.

Intensive development

Let’s go back a few years to the mid-nineties. At this time, C70S6 steel had just been launched, leading to the development of the world’s first crackable steel conrod. Due to its high carbon content, the microstructure of this steel was mainly pearlitic. This is in stark contrast to GMH’s 46MnVS5 steel, whose low carbon content makes for a significantly pearlitic microstructure with a higher ferrite content than C70S6. 46MnVS5 is strengthened by a high manganese content and the use of carefully selected alloying elements, which is achieved via precipitation hardening. 

Subheading: Weight reductions of up to 10 percent

46MnVS5 enables weight optimisation in higher-strength AFP steels. In a car’s conrod, for example, the shaft cross-section can be reduced from 119 mm2 (when using the older C70S6 material) to a mere 92 mm2. This reduces the weight of this component by around 28 grams, or approx. 10 percent – a huge figure in the world of automotive construction.

Subheading: Making use of synergy effects

It took only five years to make the new steel ready for series production. This was thanks to both GMH Group’s intelligent resource networking and the outstanding support offered by our partners, who included a Tier-1 supplier and an OEM. This top-drawer expertise has provided 46MnVS5 with the perfect platform from which to spark new life into the field of automotive development, launching it into a new era of high-flying performance.

Company

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Georgsmarienhütte GmbH

BU Steel Production

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