Answer:
Co
Step-by-step explanation:
Mechanical properties of Ni:
Tensile modulus = 199.5 GPa
Bulk modulus = 177.3 GPa
tensile strength = 400 - 600 MPa
Yield strength = 150 - 480 MPa
Mechanical properties of Co:
Tensile modulus = 211 GPa
Bulk modulus = 181.5 GPa
tensile strength = 760 - 1135 MPa
Yield strength = 345 - 485 MPa
So from above we can say that Co have more strength as compare to NI.