... 60fs8365 4 735250–300 65 40 300–375 45 30375 42 5 30 15Alloy steels: 40 12, 40 23, 40 24, 40 28, 41 18, 43 20, 44 19, 44 22, 44 27, 46 15, 46 20, 46 21, 46 26, 47 18, 47 20, 48 15, 48 17, 48 20, 5015, ... AMS 642 1 (98B37 Mod.), 642 2 (98BV40), 642 4, 642 7, 642 8, 643 0, 643 2, 643 3, 643 4, 643 6, and 644 2; 300M, D6ac220–300 60fs8165 4 3558300 4 480300–350 45 350 40 0 20fs815 4 458150 4 3203913020235397520175 43 –52 ... 42 9, 43 0, 43 4, 43 6, 44 2, 44 6, 502135–185 90fs730 4 807305 4 7807 42 0 4 1 240 39210203853912020 345 3915520 47 5(Austenitic): 201, 202, 301, 302, 3 04, 304L, 305, 308, 321, 347 ,...