That bandsaw tension gauge chart posted on modelenginemaker dot com does not specify the width or thickness of the blade used to calculate those values. The person posting that chart specified a modulus of elasticity as 29,000,000 for steel but he didn't say what alloy or grade of steel. These metal cutting band saws use blades that come in different widths and thicknesses and even different alloys. Some are single layer, some are multiple layer such as bi-metal blades.
Personally I would not rely on that chart as there are too many variables not stated and are therefore unknown.
?- Raymond