SAE 4340 steel coil is one of main products of katalor.katalor keep many Quality assurance SAE 4340 steel coil stock in our warehouse, So hereby, we sincerely hope you join us, let's join hands to make you be the No.1 in your local steel market.we promise we can offer you the qualified Quality assurance SAE 4340 steel at the competitive price and rapid delivery time. We can produce as our customer's requirement.
Chemical composition of SAE4340 steel is determined by the percentages of its elements. SAE 4340 is a tough steel capable of high strength development when heat – treated while retaining good fatigue strength.
The following table shows the chemical composition of SAE 4340 alloy steel.

Element	Content (%)
Iron, Fe	95.195 - 96.33
Nickel, Ni	1.65 - 2.00
Chromium, Cr	0.700 - 0.900
Manganese, Mn	0.600 - 0.800
Carbon, C	0.370 - 0.430
Molybdenum, Mo	0.200 - 0.300
Silicon, Si	0.150 - 0.300
Sulfur, S	0.0400
Phosphorous, P	0.0350

The physical properties of SAE 4340 alloy steel are given in the following table.

Properties	Metric	Imperial
Density	7.85 g/cm3	0.284 lb/in³
Melting point	1427°C	2600°F

SAE 4340 alloy steel is heat treated at 830°C (1525°F) followed by quenching in oil. SAE 4340 alloy steel should be in the heat treated or normalized and heat treated condition before tempering. Tempering temperatures depend upon the desired strength level. Please send us enquiry if you are interested in supplying SAE 4340 alloy steel.