Nissan will expand the use of Advanced High Tensile Strength Steel (AHSS) in to up to 25 percent of the vehicle parts (measured by weight) installed in its new production models. Nissan will make use of advanced high tensile strength steel starting in 2017 as one of its initiatives to help reduce vehicle weight.
Nissan has developed* 1.2 gigapascal (GPa) Ultra High Tensile Strength Steel with High Formability and has employed it in the new Infiniti Q50. (A gigapascal is a derived unit of strength equal to 1,000,000,000,000 (billion) pascals.) Prior to the development of 1.2GPa ultra high strength steel it had been difficult to use high tensile steels for vehicle parts with highly-complex shapes. Nissan continues to be the only auto manufacturer using 1.2 GPa Ultra High Tensile Strength Steel with High Formability.
With the active adoption of 1.2 GPa ultra high strength steel, which is one grade among several types of advanced high tensile strength steels, Nissan will increase the adoption rate of AHSS as far as 25 percent of the gross weight of the parts installed per vehicle. This effort will begin in 2017 and aims to reduce the weight of Nissan’s vehicles by 15 percent with corresponding body structure rationalization.
Through an optimal combination of materials, the jointly-developed** 1.2 GPa Ultra High Tensile Strength Steel with High Formability provides greater elongation, and offers strength and high formability, to make lighter-weight steel sheets. These attributes enable it to be used for parts with complex shapes, which had been difficult to manufacture using established high tensile steels. Combined with high-precision die design and a welding process suitable for materials during the production process, the 1.2GPa Ultra High Tensile Strength Steel with Formability can now be applied to the production of more vehicle parts.
In addition, employing 1.2 GPa high tensile strength steel leads to fewer materials used per vehicle produced, and existing production lines can be used without a big modification.
* Jointly developed by Nissan Motor Co., Ltd., Nippon Steel & Sumitomo Metal Corporation and Kobe Steel, Ltd.
** For use as structural body parts in cold pressing.