The story of stainless steel begins in 1912, when Krupp filed the first patents for rust-resistant chromium steel. More than a century later, the alloy designation is largely unchanged. We use 1.4301 as per DIN 17 440: approximately 18% chromium and 8% nickel, the composition that has proven itself in architecture and precision industry under extreme conditions.

Of more than 100 rust- and acid-resistant alloys classified as stainless steel, 1.4301 is the most widely specified for architectural applications. Its surface resists corrosion, stands up to heavy use without showing dents or scratches and requires minimal maintenance. A self-regenerating passive layer forms continuously at the surface. The material recovers by itself.

On the H64, 1.4301 is uncoated and either tumbled matte or polished to mirror grade No. 8. The surface you receive is the metal itself. No lacquer, no treatment. A decade from now it will look as it does today.

Bronze is among the oldest alloys in continuous human use. Our bronze is CuSn8: 92% copper and 8% tin, the composition that delivers exceptional strength and hardness alongside one of the most characterful patinas of any architectural metal. A material with over three thousand years of proven track record.

On the H64, bronze arrives with a controlled pre-patina. Unlike brass, which can be returned to bright gold at any time, bronze moves in one direction. Touched areas develop a warm natural lustre; untouched areas deepen and darken. Each piece becomes a record of how it has lived. Authentic ageing in an era of replacement and impermanence.

Bronze also carries a natural bactericidal property: copper alloy surfaces eliminate 99.9% of bacteria within two hours, including resistant pathogens. This is a property of the composition itself, not a coating, not a treatment. Nothing added to achieve it.