Ca c'est de la provoc' 

Le Tourer, c'est mâle.

(je le mettrais bien en signature, tiens  )

Voui, parce que, sans être prétentieux, on a des baguettes chromées nous Monsieur !

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The second one involves steel, in this case what has been tagged as the world’s first ultra high tensile strength steel to be rated at 1.2 gigapascals (GPa), which Nissan has developed in collaboration with Nippon Steel Corporation and Kobe Steel.

What’s unique about this one isn’t just its stiffness, but also its formability. Until now, high tensile strength steel involved a critical trade-off – increased strength came with increased rigidity, and with that, a consequent reduction in press formability, not to mention the challenges in spot-welding the stuff. Traditionally, only high tensile steel – rated up to 980 megapascals (MPa) – has been used in cold pressing structural body parts, requiring complex press work.

The new material changes the scene. Highly formable, it will be produced from 2013 as steel plates for use in cold pressing structural body parts, and used for centre pillar reinforcements, front and side roof rails and other key structural components.

Development of the new material was realised by a breakthrough in the ability to control its structural formation at the sub-micron level, combining hard and soft layers to achieve both strength and formability. An optimal spot-welding methodology – a proprietary process which involves careful optimisation of welding pressure, current volume and power distribution – was also developed for use with it.

The steel offers the benefit of exceeding the structural body performance of previous materials, with less thickness needed. As such, it will offer weight savings, with Nissan claiming its use will reduce vehicle body weight by up to 15 kg.[/i]

ça ça veut dire que leur nouvelle formule d' acier high tensile ( faut savoir que de l'acier " high-tensile" c'est trés vague comme terme,  ça veut tout et rien dire, ça peut être de l'acier ultra-ultra-ultra bas de gamme, on peut imaginer que c'est ce type d'acier qu'on utilise pour quasiment tout les chassis de voitures de série je suppose   leur permet d'améliorer l'emboutissage à froid,  ( la meilleur technique pour mettre en forme des tôle en preservant leur qualité mecanique et leur solidité, ça oriente les fibre du metal d'une manière trés efficace , mais c'est plus energivore que d'emboutir/forger à chaud) et donc d'utiliser moins de quantité de matière pour une même solidité du chassis.