We are leading manufacturer and stockist of Aircraft Steel AISI 4340 in China.Aircraft Steel AISI 4340 Technical Data SheetAircraft Steel AISI 4340 Chemical Composition LimitsWeight%CMnP & SSiCrNiMoE4340 Bar0.38 - 0.430.65 - 0.850.0250.15-0.300.70-0.901.65-2.000.20-0.30E4340 Plate0.38-0.430.60-0.800.0250.15-0.350.70-0.901.65-2.000.20-0.30Alloy E 4340 is a widely used deep-hardening constructional steel. Due to E-4340's high alloy content it obtains a uniformed hardness by heat treatment. The high fatigue strength makes E4340 ideal for highly stress parts as it maintains it's strength and hardn
Aircraft Steel AISI 4340