Metric Bolts | |||||
Head Marking |
Class and |
Nominal Size Range |
Mechanical Properties | ||
Proof Load |
Min. Yield Strength |
Min. Tensile Strength | |||
|
Class 8.8
Medium Carbon Steel, Quenched and Tempered |
All Sizes below 16mm |
580 |
640 |
800 |
16mm - 72mm |
600 |
660 |
830 | ||
|
Class 10.9
Alloy Steel, Quenched and Tempered |
5mm - 100mm |
830 |
940 |
1040 |
|
Class 12.9
Alloy Steel, Quenched and Tempered |
1.6mm - 100mm |
970 |
1100 |
1220 |
Stainless markings vary. Most stainless is non-magnetic. |
A-2 Stainless
Steel alloy with 17- 19% Chromium and 8-13% Nickel |
All Sizes thru 20mm |
|
210 Min. |
500 Min. |
Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield Strength: The maximum load at which a material exhibits a specific permanent deformation Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set. 1MPa = 1N/mm2 = 145 pounds/inch2 |