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ASTM F568 Specification
ASTM F568 is standard Specification for metric size bolts, screws and studs that are used in general engineering applications. It is officially titled: Standard Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners. It defines mechanical properties for fasteners that range from M1.6 to 100 in diameter
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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 |
ASTM Specifications for Bolt Fasteners
| A193 | - Alloy steel and stainless steel bolting materials for high temperature or high pressure service. |
| A307 |
|
| A320 |
|
| A325 |
|
| A354 |
|
| A449 |
|
| A453 |
|
| A490 |
|
| F568 | - Standard for metric bolts, screws and studs that are used in general engineering applications |
| F593 |
|
| F1554 |
|
ASTM Specifications for Nuts
ASTM Specifications for Washers
| F436 | - Specification for Hardened Steel Washers , carbon steel, steel, washers, weathering steel, Hardened steel washers |
| F844 |
|
| F959 |
|
Astm F568 Metric Bolts Application Industries
Sunflex Metal Industries are engaged in manufacturing of robust quality of Astm F568 Metric Bolts. These Astm F568 Metric 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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