Hardness conversion - Austenitic vs all other steels
Hardness conversion - Austenitic vs all other steels
(OP)
I was just reading ASTM E140 Standard Hardness Conversion Tables for Metals. Table 2 gives conversions for non-austenitic steels (Rockwell B hardness range) and Table 5 gives conversions for austenitic stainless steel also in the Rockwell B range. The differences are not huge but significant:
HRB 100 = 240 Brinell non austenitic
HRB 100 = 253 Brinell austenitic
Not being a metallurgist, I was wondering what the reason is for the difference? Is the austenitic stainless steel work hardening more in the Brinell test thus giving a higher reading?
HRB 100 = 240 Brinell non austenitic
HRB 100 = 253 Brinell austenitic
Not being a metallurgist, I was wondering what the reason is for the difference? Is the austenitic stainless steel work hardening more in the Brinell test thus giving a higher reading?
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RE: Hardness conversion - Austenitic vs all other steels
RE: Hardness conversion - Austenitic vs all other steels
Remember, at best, the E140 conversions are an "estimate" of what the hardness would be if tested on another scale. The different groupings (carbon/low-alloy, austenitic, non-ferrous) are attempts at improving the estimate, but that is all it is, an attempt to obtain a better estimate. If you have a Rockwell "B" reading, but need to know the hardness in Brinell, your best bet is to perform the Brinell test.
rp
RE: Hardness conversion - Austenitic vs all other steels
"Whom the gods would destroy, they first make mad "
RE: Hardness conversion - Austenitic vs all other steels
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Hardness conversion - Austenitic vs all other steels
Now when we have to do a hardness in a scale other than the one that is called out in the spec (usually due to the matterial being too thin) we report both the actual reading and our conversion.
Of course we have built our own conversions as well.
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Plymouth Tube
RE: Hardness conversion - Austenitic vs all other steels
RE: Hardness conversion - Austenitic vs all other steels