What are the clips on a QO plug on breaker made of?

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Issue:
What is the material on the QO plug on jaw?

Product Line:
Circuit breaker

Resolution:
The QO jaw is tin plated CDA Cabra Alloy No. 210 per ASTM B36 copper alloy.
The QOB terminal is Revere Alloy No. 210 per ASTM B36 copper alloy.