All NANO gear is made from high grade stainless steel. All commercial brewers take extremely good care of their stainless steel and it shouldn't be different for any craft brewer to ensure you get a life time use.
Like any grade of stainless steel, the most common grade for brewing equipment is the 304 grade. All grades contain iron so this article gives you a guide to ensuring that iron does not take hold over your brewing equipment.
When the iron is bonded in the stainless steel alloy it’s extremely difficult for iron to react/rust. However combine that with a manufacturing process, bending, welding, grinding a