High Tensile Nickel Chrome Steel
Steel AISI 4340

Characteristics
It has high hardenability and is capable of giving good properties in large sections. It is relatively free from temper brittleness and retains useful machinability at relatively high hardness.

Availability
Round bar

Chemical Composition
C : 0.38 - 0.43
Mn : 0.60 - 0.80
P : 0.40 (Max)
S : 0.040 (Max)
Si : 0.20 - 0.35
Ni : 1.65 - 2.00
Cr : 0.70 - 0.90
Mo : 0.20 -0.30

Mechanical Properties
Hardening Temp : 820 - 850 C
Ouenching Medium : Oil
Hardness as Supplied : 220 - 250 BHN,
Sizes Available : 20mm - 300mm

Applications
Automotive crankshafts and rear axle shafts, aircrafts crankshafts, Connecting Rods, Propeller Hubs, Gears, Drive shafts, Landing gear parts and heavy duty parts of rock drill

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