Steel AISI 4140

C  0,45
Si 0,4 
Mn 0,9 
P 0,025
S  0,035
Cr 1,2
Mo  0,3

Steel with high strength and toughness in tempered condition, can be induction hardened Applicability Machine construction, machine parts, axes, connecting rods, crankshafts, gear shafts, pinions, base plates Supply Length 500 and 1000 mm with machining allowance, in plate form with square cross section dimensions annealed max. 241 HB (max. 820 N/mm2)

Heat Treatment Data annealing 840 - 880 °C Soft annealing 680 - 720 °C Hardening 820 - 880 °C Quenching Oil or water Tempering 540 - 680 °C