Rockwell Hardness
Rockwell Hardness
(OP)
Can anyone explain the following:
copper 1/4 Hard
copper 1/2 Hard
copper 4/4 Hard
The above are used in a strain formula I am using. Basically, in the formula you would use a permissible strain of 1200daN/cm^2 for 1/4, 2300 for 1/2, and 3000 for 4/4.
Problem is, the manufacturer has given the hardness of the copper I am using as a hardness of 84 from a rockwell Hardness test?
How do I get the 2 to meet?





RE: Rockwell Hardness
There is some good tech info there, although it is sometimes difficult to find.
RE: Rockwell Hardness
The following two publications have references to temper designations .
BS EN 1173.
CDA Publication No 120,
RE: Rockwell Hardness
ASTM B-88 Seamless copper water tube
ASTM B601 Temper Codes for Copper Metal and Copper Alloys
1/8 Hard H00
1/4 Hard H01
1/2 Hard H02
3/4 Hard H03
4/4 Hard H04
RE: Rockwell Hardness
You need to know the Rockwell scale that the "84" value is taken from. For copper, it is likely F or G scale. Once you know the scale you can convert to tensile strength.
Try this website:
http://www.gordonengland.co.uk/hardness/hardness_conversion_3c.htm
Good Luck.
Terry