We have some good metal shear charts for your reference
These charts are based on shearing mild steel, 60,000 psi tensile.
These charts must only be used as a guide, as there may be variations of material grade and quality when shearing metal.
Shearing is the mechanical process of cutting plate or sheet metal material by two metal blades, inclined at an angle, that are forced through the material by hydraulic or mechanical actuators. In reality, only a small part of the material is actually sheared, the rest of the material is fractured.
Metal Shearing Charts:
1: HYDRAULIC SHEAR CAPACITY CHART
2: TWIST BOW AND CAMBER EFFECTS
3: TONS OF PRESSURE REQUIRED TO SHEAR 1 INCH
4: HOW TO SQUARE A BLANK PROCEDURE
5: MINIMUM DROP WIDTH ON SHEAR STRIPS
6: SHEAR STRENGTH AND PENETRATION FACTOR IN SHEAR STRIPS
The load required to shear metal will vary according to the square of the thickness, the shear stress of the material and inversely as to the rake of the shear upper blade. The term, shear "rake" is used to designate the angle of the upper balde and is usually in the terms of inches per foot. A 1/4" rake angle means that the upper shear blade slopes at a rate of 1/4" per foot of length.
Shearing a full width sheet, the shear force remains constant as the blade moves through the downward portion of the shear cycle. In a shearing cycle, a portion of the material is actually sheared and the rest is fractured through due the shearing action.
The depth which the blade penetrates into the material is determined by the hardness and shear strength of the material and is reflected in the factor "elongation" shown in steel charts. Elongation or the depth of penetration is an important factor in determining the shear load.