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Hardness Requirements of A194 / A194M
1,2,2HM,and 2H,4,3,6,6F,6F,7,7M,8,8A,8C,8CA,8M,8MA,
8T,8TA,8F,8FA,,8P,8PA,8N,8NA,8LN,8LNA,8MN,8MNA,8MLN,
8MLNA,8R,8RA,8S,8SA,8MLCuN,8MLCuNA,9C,9CA,16
Grade and Type |
Completed Nuts |
Sample Nut after Treatment as in 8.1.5 |
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Brinell Hardness |
Rockwell Hardness |
Brinell Hardness,min |
Rockwell Hardness B Scale,min |
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C Scale |
B Scale |
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1 |
121 min |
… |
70 min |
121 |
70 |
|
2 |
159 to 352 |
… |
84 min |
159 |
84 |
|
2H to 1 1/2 in. or M36,incl |
248 to 327 |
24 to 35 |
… |
179 |
89 |
|
2H over 1 1/2 in. or M36 |
212 to 327 |
35 max |
95 min |
147 |
79 |
|
2HM and 7M |
159 to 235 |
… |
84 to 99 |
159 |
84 |
|
3.4.7. and 16 |
248 to 327 |
24 to 35 |
… |
201 |
94 |
|
6 and 6F |
228 to 271 |
20 to 28 |
… |
… |
… |
|
8,8C,8M,8T,8F,8P,8N, 8MN,8LN,8MLN,8MLCuN,and 9C |
126 to 300 |
32 max |
60 min |
… |
… |
|
8A,8CA,8MA,8TA,8FA,8PA,8NA, 8MNA,8LNA,8MLNA,8MLCuNA,and 9CA |
126 to 192 |
… |
60 to 90 |
… |
… |
|
8R,8RA,8S,and 8SA |
183 to 271 |
25 max |
88 min |
… |
… |
|