AI - 777
Asbestos Beater Jointings (Grade : AI-777)
| S.No. | Particular | – | AI-777 |
| 1 | Density (gms/cc) | – | 1.15 ± 0.05 |
| 2 | Tensile Strength (kg/cm²) | (Minimum) | 75 |
| 3 | Compressibility at 5000 psi/ 350 kg/cm² (%) | – | 25-40 |
| 4 | Recovery (%) | (Minimum) | 35 |
| 5 | Loss on Ignition at 800 °C(%) | (Maximum) | 40 |
| 6 | After immersion in ASTM Oil No. 3 for 5 Hrs. @ 150 °C | – | – |
| Weight increase (%) | (Maximum) | 50 | |
| Thickness increase (%) | (Maximum) | 5 | |
| 7 | After immersion in ASTM Fuel B for 5 Hrs. | – | – |
| Weight increase (%) | (Maximum) | 40 | |
| Thickness increase (%) | (Maximum) | 5 | |
| 8 | Dimensions | – | – |
| Thickness Availablity | – | 0.40 mm – 1.50 mm | |
| Standard Size | Rolls of 1220 mm width, Length according to thickness. | ||
| 9 | ASTM Specification Compliance | F126160E51M4 |
Overview & Challenge
AI-777 is a medium-density asbestos beater jointing material manufactured from high-quality chrysotile fibres blended with heat-resistant fillers and a special binder system. This grade is designed to offer superior sealing properties under moderate pressure and temperature conditions. It is particularly suitable for applications involving steam, oils, fuels, and general industrial gases, providing a reliable and long-lasting joint performance.
AI-777 maintains excellent recovery and compressibility characteristics, ensuring tight sealing even under fluctuating thermal and mechanical conditions. Its controlled density and mechanical strength make it ideal for use in automotive, marine, and general engineering applications.
Why Choose AI-777?
AI-777 offers a balanced combination of performance, affordability, and reliability.
It is especially suited for OEM and maintenance applications where standard sealing is required without the added cost of high-density or premium-grade jointing materials.