SAE 4340 Purpose: heavy machinery such as high load of axial, turbine shaft larger than 250 mm in diameter, a helicopter rotor shaft, turbojet engine turbine shaft, blade, high load transmission piece of moving parts, fasteners, crankshaft gear, etc. Also can be used for operating temperature more than 400℃ rotor shaft and blade, etc.;  SAE 4340 steel can also into after nitriding processing, used to make special performance requirements of the important parts, after low temperature tempering or can be used for ultra-high strength steel after isothermal quenching.

SAE 4340 Chemical Compositions(%)

SAE 4340 Mechanical Properties

The corresponding steel grades to SAE 4340：40CrNiMoA，DIN 36CrNiMo4，DIN 1.6511，NF 40NCD3，JIS SNCM439，BS 816M40，AISI/4340，UNS G43400.

SAE 4340 Delivery status: by heat treatment (normalizing, annealing and high temperature tempering) or heat treatment state delivery, delivery status should be indicated in the contract.

SAE 4340 alloy steel Heat treatment: quenching 850 degrees; Coolant: oil; Tempering temperature 600 degrees; Coolant: water, oil; Or high temperature tempering steel annealing supply state brinell hardness GBW less than or equal to 269.

SAE 4340 Alloy Structure Steel Plate Specifications：
Steel Standard: SAE 4340
Thickness: 4.5 mm to 250 mm
Width: from 1.6 m to3.8m
Length: Up to 18 m

Katalor Enterprises has established a full set of strict quality control system, advanced manufacturing technique and equipments. As a SAE 4340 alloy structure steel plate  stockist and supplier, if you have any demand of SAE 4340 alloy structure steel plate price, please do not hesitate to contact us .