THE TERM AIRLESS STEEL REFERS TO VACUUM-MELTED, AGE HARDENED STEEL. EXAMINATION OF THE STEEL REVEALS EXCELLENT MACHINABILITY. VERY GOOD SURFACE FINISHES ARE ATTAINABLE AND FULL DEPTH ROUGH/FINISH PASSES ARE POSSIBLE NEXT TO CONTOUR. IN ADDITION, EDM BURN RATES ARE IMPROVED WITHOUT MARTENISTIC LAYER OCCURRENCES. UNIFORMITY OF HARDNESS (RC-40) THROUGHOUT, EVEN IN LARGE SECTIONS; GREATLY REDUCED RESIDUAL STRESSES, AND IMPROVED MOLD LONGEVITY ARE ATTRIBUTABLE TO VACUUM-MELTED, AGE HARDENED (VMAH) STEEL. APPLICATIONS FOR VMAH STEEL INCLUDE COMPRESSION, RTM, AND INJECTION MOLD TOOLING. APPLICATIONS AND EXAMPLES ARE PROVIDED.