Corten steel adult cremation urn 'Triangle'

Three planes, one form

Sometimes a shape says what words cannot. The triangle of this corten steel cremation urn draws three connected planes around the ashes of someone you loved, creating a quiet, enclosed space built from the strength of simplicity and honest material.

Corten steel: a material that develops over time

Corten steel is a metal alloy combining iron with copper, phosphorus, silicon, nickel and chromium. That combination produces something distinctive: the material forms its own dense oxide layer, which seals and protects the steel beneath. What looks like rust is not deterioration. It is the material finding its own surface. The colour begins as a vivid orange-brown and deepens gradually into a rich, earthy tone over the years. Each piece moves at its own pace, shaped by the environment around it. During production, this urn is treated to accelerate that process, so the first layer begins to establish itself early.

Precision forming from flat sheet

Corten steel is only available as flat sheet material. The triangular form is achieved by bending and welding that sheet, or by cutting precise shapes using laser or waterjet techniques. Getting this right requires careful design: the construction must avoid any hollows where moisture could collect, because standing water would drive corrosion beyond the controlled patination the material is known for. That knowledge is built into this urn from the start.

A form that holds something

The three planes close around one another to create a protected interior space. That is where you place the ashes, with or without an ash bag. The triangle has carried associations of connection and balance for centuries. That the bond you shared now rests inside a form built around exactly those ideas is not accidental. It is a considered choice.

Designed for indoor use

This urn for ashes is intended for use indoors. Corten steel responds to moisture and oxygen, and that process needs a stable environment to remain predictable. Kept inside, the layer that has formed stays settled and the colour shift is gradual.

Practical and straightforward

The urn is suitable for use with or without an ash bag. Here is what you need to know about the material and its care, so you can choose with confidence.

Colour development and care

In the early stages of the oxidation process, a thin surface layer may loosen. This is the mill scale formed during production, not damage to the urn itself, and it disappears on its own. Minor marks and small colour variations can occur and will also even out over time. Cleaning is straightforward: water and a mild soapy solution is all that is needed. If the surface is ever scratched or marked, a new rust layer will form over that area, beginning its own colour cycle, which may temporarily differ from the surrounding surface before settling.

Placement: a practical note

When choosing where to position this urn, bear in mind that rust water can run from the surface and leave traces on whatever sits beneath it. Porous stone and stainless steel surfaces placed directly under corten steel are best avoided, as staining can occur. A small felt pad or a wooden surface works well as a base.

If you would like to personalise this urn, options are available to make it specific to the person you are remembering. Get in touch and we will talk through what is possible at your own pace.