Dear Prof. Di Chen:
 I think you can check Ni shear modulus in the following website, which is
 80MPa.

http://www.efunda.com/materials/common_matl/Common_Matl.cfm?MatlPhase=Solid&
MatlProp=Mechanical#Mechanical

 Best regards

 Yanjun(David) Tang

 Graduate student
 Institute for Micromanufacturing
 Louisiana Tech University

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