Symbols and trademarks
Marking of tensile strength and designation
|
Property class |
3.6 |
4.6 |
4.8 |
5.6 |
5.8 |
6.8 |
8.8 |
9.8 |
10.9 |
12.9 |
|
Designation* |
3.6 |
4.6 |
4.8 |
5.6 |
5.8 |
6.8 |
8.8 |
9.8 |
10.9** |
12.9 |
* The decimal point in the designation may be omitted
** When martensitic steel with a low carbon content is used for property class 10.9, the designation 10.9 must be underlined: 10.9
Trademark
The manufacturer’s trademark (identification mark) is mandatory for all products that are marked with property class.
