The shear strength of a sheet metal is 300 MPa. The blanking

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The shear strength of a sheet metal is 300 MPa. The blanking force required to produce a blank of 100 mm diameter from a 1.5 mm thick sheet is close to

1. 45 kN
2. 70 kN
3. 141 kN
4. 3500 kN

Correct Option: C

Blanking force = τ × A_s = 300 × πdt = 300 × π × 100 × 1.5 = 141 kN