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ASTM F568 Specification : ASTM F568 Grade Class 9.8 Bolts
ASTM F568 Specification covers Grade 9.8 Bolts/Screws/Studs manufactured from medium carbon Boron Steel in Quenched & tempered condition within size range of M1.6 upto M16 & minimum Tensile Strength of 900 Mpa.
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| Grade 9.8 | Medium Carbon Boron Steel ; Quenched & Tempered |
|---|
| Markings & Mechanical Prperties | ||||||
|---|---|---|---|---|---|---|
| Grades | Markings | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
| Class 9.8 |  | 1.6–16 | 650 | 720 | 900 | C27–36 |
Grades Material Description
| Grade 4.6 | Low or medium carbon steel |
|---|---|
| Grade 4.8 | Low or medium carbon steel; fully or partially annealed |
| Grade 5.8 | Low or medium carbon steel; Cold worked |
| Grade 8.8 | Medium Carbon Boron Steel ; Quenched & Tempered |
| Low carbon Grade 8.8 | Low Carbon Boron Steel ; Quenched & Tempered |
| Grade 8.8.3 | Atmospheric corrosion resistant steel ; Quench and Tempered |
| Grade 9.8 | Medium Carbon Boron Steel ; Quenched & Tempered |
| Low carbon Grade 9.8 | Low Carbon Boron Steel ; Quenched & Tempered |
| Grade 10.9 | Quenched & Tempered ; Alloy Steel |
| Low Carbon Grade 10.9 | Low Carbon Boron Steel ; Quenched & Tempered |
| Grade 10.9.3 | Atmospheric corrosion resistant steel ; Quench and Tempered |
| Grade 12.9 | Quenched & Tempered ; Alloy Steel |
Markings & Mechanical Prperties
| Markings & Mechanical Prperties | ||||||
|---|---|---|---|---|---|---|
| Grades | Markings | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
| Class 4.6 |  | 5–100 | 225 | 240 | 400 | B67–95 |
| Class 4.8 |  | 1.6–16 | 310 | 340 | 420 | B71–95 |
| Class 5.8 |  | 5–24 | 380 | 420 | 520 | B82–95 |
| Class 8.8 |  | 0.050% | 600 | 660 | 830 | C23–34 |
| Low carbon Class 8.8 |  | 17–72 | 600 | 660 | 830 | C23–34 |
| Class 8.8.3 |  | 17–72 | 600 | 660 | 830 | C23–34 |
| Class 9.8 | | 1.6–16 | 650 | 720 | 900 | C27–36 |
| Low carbon Class 9.8 |  | 1.6–16 | 650 | 720 | 900 | C27–36 |
| Class 10.9 |  | 5–100 | 830 | 940 | 1040 | C33–39 |
| Low Carbon Class 10.9 |  | 5–100 | 830 | 940 | 1040 | C33–39 |
| Class 10.9.3 |  | 5–100 | 830 | 940 | 1040 | C33–39 |
| Class 12.9 |  | 1.6–100 | 970 | 1100 | 1220 | C38–44 |
Grade Class 9.8 Bolts Application Industries
Sunflex Metal Industries are engaged in manufacturing of robust quality of Grade Class 9.8 Bolts. These Grade Class 9.8 Bolts are widely used in the following industries:
Mining Industries Transport Industries- Rail and Road Construction Industries / Building Systems Manufacturing Industries Agriculture Industries Energy Industries Water Industries Automotive Industries Ship Building Industries Nuclear Power Plant Paper & Pulp Industries Sugar Industries Engineering Cement Industries Petro-Chemical Industries Food Industries Oil & Gas Industries Chemical & Pharmaceutical Industries
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