From the manufacturer:
Blade:12C27 Sandvik Stainless Steel
We use Sandvik 12C27 modified stainless steel. It is anti-corrosive thanks to the addition of chrome and requires no special maintenance. Its carbon content of at least 0.40% provides an excellent cutting edge.
Beech is the most commonly used wood for the manufacture of Opinel handles. From France, our beech is hard, durable and easy to work. With a homogeneous appearance, its light color varies from yellow to pink. It is characterized by the presence of numerous small, -dark dashes.
Yatagan Style:The classic Opinel blade has adopted a Yatagan shape. The Yatagan shape is inspired by a traditional Turkish saber, the toe up. The blade is ground to an exclusive convex profile that ensures the strength of the blade and allows efficient regrinding.