Six families, each solving a different engineering problem. Hastelloy for corrosion, Inconel for temperature, titanium for weight and chlorides.
Half the weight of steel, effectively immune to seawater. The standard light metal of aerospace and defence.
Nickel-chromium superalloys. Materials that keep their strength above 1000 °C.
Nickel-molybdenum corrosion alloys. One material for processes where the chemistry keeps changing.
The bridge between stainless steel and nickel alloys. More economical, and enough for most work.
The materials for fast-flowing seawater, hydrofluoric acid and caustic service.
When 316L is not enough but a nickel alloy is overkill, the answer is usually here.