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Test | Specifications Limits of Grade | ||
PMB 120 | PMB 70 | PMB 40 | |
Penetration at 25 C, 0.1mm, 100g, 5sec. | 90 to 150 | 50 to 90 | 30 to 50 |
Softening Point,(R&B), C, Minimum | 50 | 55 | 60 |
Ductility at 27 C, cm | 50 | 40 | 30 |
Fraass Breaking Point C , Maximum | -20 | -16 | -12 |
Flash Point, By COC C, Minimum | 220 | 220 | 220 |
Elastic Recovery of Half Thread in Ductilometer at 15 C, Minimum | 50 | 50 | 50 |
Separation, Difference in Softening Point, R&B, C, Maximum | 3 | 3 | 3 |
Viscosity at 150 C, Poise | 1-3 | 2-6 | 3-9 |
Loss in weight, % Maximum | 1 | 1 | 1 |
Increase in Softening Point C, Maximum | 7 | 6 | 5 |
Reduction in Penetration of Residue, at 25 C, % Maximum | 35 | 35 | 35 |
Elastic Recovery of Half Thread in Ductilometer at 25 C, % Minimum | 35 | 35 | 35 |