ASTM F568 Grade Class 8.8 Suppliers, Manufacturers
ASTM F568 Specification covers Grade 8.8 Bolts/Screws/Studs manufactured from medium carbon Boron Steel in quenched & tempered condition with size range of M1.6 upto M72 & minimum Tensile Strength of 830 Mpa.
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Grades Material Description
| Grade 8.8 | Medium Carbon Boron Steel ; Quenched & Tempered |
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Markings & Mechanical Prperties
| Markings & Mechanical Prperties | ||||||
|---|---|---|---|---|---|---|
| Grades | Markings | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
| Class 8.8 |  |
Under M16 | 580 | 640 | 800 | |
| 17-72 | 600 | 660 | 830 | C23–34 | ||