United States · ASTM
F568 Class 8.8.3 D
ASTM F568M:2007 — ASTM F568M
Chemical composition
wt% · log scale- min – max range
- typical value
Mechanical properties
value range by conditionChemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.14 | 0.26 | Heat analysis 0.15 < C <= 0.25 | |
| Cr | 0.45 | 1.05 | Heat analysis 0.5 < Cr <= 1 | |
| Cu | 0.27 | 0.53 | Heat analysis 0.3 < Cu <= 0.5 | |
| Mn | 0.36 | 1.24 | Heat analysis 0.4 < Mn <= 1.2 | |
| Mo | 0.11 | Heat analysis Mo <= 0.1 | ||
| Ni | 0.47 | 0.83 | Heat analysis 0.5 < Ni <= 0.8 | |
| P | 0.045 | Heat analysis P <= 0.04 | ||
| S | 0.055 | Heat analysis S <= 0.05 | ||
| Si | 0.2 | 0.55 | Heat analysis 0.25 < Si <= 0.5 | |
| Ti | Heat analysis: Ti <= 0.05 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bolts, bolts, quenched and tempered, M20-M36 mm, screws | 660 | 830 | 12 | 35 | ||
| bolts, bolts, quenched and tempered, M20-M36 mm, HR | Screw 23 34.00 | |||||
| bolts, bolts, quenched and tempered, M20-M36 mm, HV | Screw 255 336.00 |