| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. PENETRATION TEST (IS 1203) | |||
| A1 | Penetration test conducted per IS 1203; 100g standard needle, 25°C, 5 sec loading Acceptance: Test at 25°C ±0.5°C; 5 sec loading; needle 100g ±0.5g; result in 0.1mm units | Cl. 501 — Test procedure | |
| A2 | Penetration value measured (0.1mm units); result documented Acceptance: 60/70 grade: 60-70; 80/100: 80-100; 100/120: 100-120; 150/200: 150-200 (dmm) | Cl. 501 — Measurement recording | |
| A3 | Three test specimens prepared and measured; average and standard deviation calculated Acceptance: Three measurements; standard deviation <2 dmm; result = average of three | Cl. 501 — Statistical analysis | |
| B. SOFTENING POINT TEST (IS 1205) | |||
| B1 | Softening point test conducted per IS 1205 (Ring and Ball method); test at atmospheric pressure Acceptance: Ring and ball apparatus; heating rate 5°C/min; end point when ball passes through ring | Cl. 501 — Test procedure | |
| B2 | Softening point temperature recorded (°C); two test samples prepared Acceptance: 60/70 grade: 46-56°C; 80/100: 47-57°C; measured at ±0.5°C precision | Cl. 501 — Temperature measurement | |
| B3 | Average softening point calculated from two samples; result documented Acceptance: Average of two tests; difference <2°C between samples; if >2°C, repeat test | Cl. 501 — Result calculation | |
| C. DUCTILITY TEST (IS 1208) | |||
| C1 | Ductility test conducted per IS 1208; briquette mold, constant extension rate 5 cm/min, 25°C Acceptance: Test at 25°C; extension rate 5 cm/min; temperature maintained ±0.5°C | Cl. 501 — Test procedure | |
| C2 | Ductility measured as elongation (cm) before thread breaks; result recorded Acceptance: 60/70 & 80/100 grade: ≥75 cm at 25°C minimum; measured to 0.1cm precision | Cl. 501 — Measurement recording | |
| C3 | Two specimens tested; elongation values recorded separately; result = lower value reported Acceptance: Two samples minimum; report lower value; if <75 cm, batch rejected for poor ductility | Cl. 501 — Sample testing | |