MECHANICAL PROPERTIES FOR BOLTS, SCREWS AND STUDS — AUSTENITIC STEEL GRADES ISO 3506-1:2009 (EXTERNALLY THREADED FASTENERS)
| Group | Grade | Property Class | Size range | Min. Tensile Strength MPA | Stress at 0,2 % permanent strain min MPA | Elongation after fracture min | Grade Identification Marking |
| Austenitic | A2 | 70 | M6-M42 | 700 | 450 | 0.4d |  |
| Austenitic | A2 | 80 | M6-M42 | 800 | 600 | 0.3d |  |
| Austenitic | A4 | 70 | M6-M42 | 700 | 450 | 0.4d |  |
| Austenitic | A4 | 80 | M6-M42 | 800 | 600 | 0.3d |  |
MECHANICAL PROPERTIES PER ISO 898-1 (EXTERNALLY THREADED FASTENERS)
| Group | Material | Size Range | Min. Proof Strength MPA | Min. Tensile Strength MPA | Core Hardness Rockwell
|
Min. Yield Strength MPA | Grade Identification Marking | ||
| 4.6 | Low or medium carbon steel | M5 - M39 | 225 | 400 (58,000 PSI) |
|
240 |  |
||
| 8.8 | Medium carbon steel: quenched & tempered | M5 - M16 M18 - M39 |
580 600 |
800 (116,000PSI) 830 (120,000 , PSI) |
|
640 660 |
 |
||
| 10.9 | Alloy steel: quenched & tempered | M5 - M39 | 830 | 1040 (150,800 PSI) |
|
940 |  |
||
| 12.9 | Alloy steel: quenched & tempered | M1.6 - M39 | 970 | 1220 (177,000 PSI) |
|
1100 |  |
MECHANICAL PROPERTIES FOR NUTS — AUSTENITIC STEEL GRADES ISO 3506-2:2009 (INTERNALLY THREADED FASTENERS)
| Metric Property Class | Grade | Property Class | Stress under proof load (Sp) min. Steel group MPA | Grade Identification Marking |
| Nuts with thk ≥ 0,8D | Nuts with thk ≥ 0,8D | |||
| Austenitic | A2 | 70 | 700 |  |
| Austenitic | A2 | 80 | 800 |  |
| Austenitic | A4 | 70 | 700 |  |
| Austenitic | A4 | 80 | 800 |  |
MECHANICAL PROPERTIES PER DIN 267 PART 4 (INTERNALLY THREADED FASTENERS)
| Property Class | Typical Material | Proof Stress MPa | Core Hardness Rockwell Min. | Grade Identification Marking |
| Class 8 | Low to medium carbon steel | 800 | C30 |  |
| Class 10 | Medium carbon steel; quenched & tempered | 1000 | C36 |  |
| Class 12 | Medium carbon steel; quenched& tempered | 1200 | C36 |  |