Standar for Bolt |
Grade |
Bolt Size |
Tension Stength |
Yield Strength |
Enlogation |
Hardness |
Head Marking |
|
in. |
ksi |
ksi |
% |
Brinell |
Rockwell C |
|||
A449 |
type1 |
1/4 to 1 |
120min |
92min |
14 |
255-321 |
25-34 |
|
over 1 to 1-1/2 |
105min |
81min |
14 |
223-285 |
19-30 |
|||
over 1-1/2 to 3 |
90min |
58min |
14 |
183-235 |
/ |
|||
type2 |
1/4 to 1 |
120min |
92min |
14 |
255-321 |
25-34 |
|
|
over 1 to 1-1/2 |
105min |
81min |
14 |
223-285 |
19-30 |
|||
over 1-1/2 to 3 |
90min |
58min |
14 |
183-235 |
/ |