TORQUE LEDGER v1.0
> SYSTEM READY. CALCULATING PRELOAD FOR STRUCTURAL INTEGRITY.
> WARNING: FAILURE TO APPLY CORRECT TORQUE MAY RESULT IN CATASTROPHIC JOINT SEPARATION.
Default: 0.15 (Oiled Zinc)
> AWAITING INPUT...
REFERENCE CONSTANTS (ASTM A325/A490 BASED)
| GRADE | PROOF LOAD (ksi) | ULTIMATE TENSILE (ksi) | YIELD STRENGTH (ksi) | APPLICATION |
|---|---|---|---|---|
| 5 | 85 | 120 | 92 | General Automotive / Structural |
| 8 | 130 | 150 | 133 | High-Stress Aerospace / Heavy Machinery |
| L7 | 150+ | 180+ | 150 | Critical Seismic Bracing |
SOURCE: SAE J429 | ASTM A325 | WIKIDATA:Q1139344 (GRADE)