Fellow TechNetters:

   I am very surprised that I have not had very many feedbacks on my initial hardness inquiry.   I would suspect that there would be many users of hardness testing out there.   Perhaps this time it will be a charm.   In a previous life I just used the instrument.   This time I want to understand the test and instrument.

Victor,

_____________________________________________
From: Hernandez, Victor G
Sent: Wednesday, May 02, 2012 7:47 AM
To: TechNet E-Mail Forum
Cc: Hernandez, Victor G
Subject: Hardness testing guidelines


Fellow TechNetters,

   What are some guidelines with regards to hardness testing,
Aluminum 384, ADC 12
Rockwell B, ball bearing, 1/16 inch dia. (0.0625 dia.)
Load:           100
Target:         53
Min coupon thickness:   ???????
Coupon Size:   ????????
Spacing between sites:   ???????
Coupon flatness:   ???????

My sample is:
Coupon thickness:       0.05425 inch
Coupon Size:            1.3 x 0.58 inch
Can the round indentation, diameter and depression, be used to confirm the instrument reading/value?

Victor,


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