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                              Shearing

                              HS 100 and HS 400 plate can be cut by shearing. We do not recommend shearing HS 450 and HS 500. For best results, the following three points must be observed:

                              1. Clearance between the stationary and the moveable blade increases as the tensile strength increases. Too much or too little clearance results in a poor surface, which can give rise to cracks when welding and forming.
                              2. Rake angle is a question of balance. The bigger the angle, the less shearing force is required. However, a larger rake angle increases the risk of slipping sideways and twisting the plate being sheared.
                              3. Shearing force increases with the increasing tensile strength of the plate. Sharp blades with light edge rounding are recommended.
                              Shearing Force
                              Shearing force can be calculated using the following formula:
                              An Example
                              Shearing of a Typical 3/8" thick plate in HS 100 with rake angle of 3o
                              Rake angle 3o - shear force 73 tons
                              Rake angle 4o - shear force 55 tons
                              Rake angle 5o - shear force 44 tons
                              An Example
                              Shearing of a Typical 3/8" thick plate in HS 400. Rake angle 3o - shear force 107 tons

                              Recommended Adjustment for Clearance and Rake Angle
                              GRADE CLEARANCE
                              % of t
                              RAKE ANGLE TYPICAL VALUES
                              RM P.S.I. A%
                                 
                              A572-65 9-12 2-5
                              90,000 20
                              HS 100 12-15 3-5
                              125,000 17
                              HS 400 16-18 3-5
                              181,000 11
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