17-4 / AMS 5355 |
36 Rc |
34-44 Rc |
Corrosion resistant / Machinable |
410 / CA15 |
100 Rb |
94 Rb-45 Rc |
Good hardness and corrosion resistance |
416 / AMS 5349 IC 416 |
100 Rb |
94 Rb-45 Rc |
Better machinability than 410 |
420 / ASTM A743 IC |
420 25 Rc |
30-52 Rc |
Higher hardness |
440C / AMS 5352 IC |
440C 35 Rc |
40-60 Rc |
Good toughness / Higher hardness |