Which type of metal is considered non-sparking?

Aluminum is considered non-sparking due to its physical properties. This means that when aluminum comes into contact with another material or is struck, it does not create sparks, which can be crucial in environments where flammable substances are present.

The non-sparking nature of aluminum makes it a preferred choice in various applications that require safety around flammable materials, such as in the construction of tools and equipment used in hazardous areas.

In contrast, hot-rolled steel, stainless steel, and tin have properties that can produce sparks during impacts or friction, making them less safe in certain environments. Thus, aluminum stands out as the safest option where spark generation could pose a risk.