When selecting a hacksaw blade to cut light angle iron, what is the recommended teeth per inch (tpi)?

The recommended teeth per inch (tpi) for cutting light angle iron with a hacksaw blade is 18. This tpi provides an optimal balance between cutting speed and finish quality. When cutting materials such as light angle iron, which is typically not overly thick, a blade with 18 tpi ensures that you have enough teeth engaging the material to allow for a smooth and efficient cut.

A lower tpi, such as 14, might be suitable for thicker materials but could result in a rougher cut on light angle iron. On the opposite end, a higher tpi like 24 or 32 would lead to slower cutting speeds and might clog more easily due to greater tooth density, especially when dealing with softer metals. Hence, using an 18 tpi blade is effective for achieving a good combination of performance and finish when working with light angle iron.