Grade
|
Chemical composition % (maximum unless stated)
|
|||||||
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
|
A4 |
0.08 |
1.0 |
2.0 |
0.05 |
0.03 |
16.0 to 18.5 |
2.0 to 3.0 |
10.0 to 14.0 |
Property Class
|
Diameter Range
|
Bolts, screws & studs |
Nut |
||
Tensile strength N/mm²(min) |
0.2% Proof stress N/mm²(min) |
Extension (min) |
Proof Load stress N/mm²(min) |
||
A4-50 |
up to M39 |
500 |
210 |
0.6d |
500 |
A4-70 |
up to M20 |
700 |
450 |
0.4d |
700 |
A4-80
|
up to M20
|
800
|
600 |
0.3d |
800 |