AISI 4340 Steel, oil quenched 845°C, 650°C (1200°F) temper

Login to see your most recently viewed materials here. Or if you don't have an account with us yet, then click here to register.

(Viewing data as-entered. Click here to return)

AISI 4340 Steel, oil quenched 845°C, 650°C (1200°F) temper
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Material Notes:	AISI 4340 has a favorable response to heat treatment (usually oil quenching followed by tempering) and exhibits a good combination of ductility and strength when treated thusly. Uses include piston pins, bearings, ordnance, gears, dies, and pressure vessels.
Key Words:	alloy steels, UNS G43400, AMS 5331, AMS 6359, AMS 6414, AMS 6415, ASTM A322, ASTM A331, ASTM A505, ASTM A519, ASTM A547, ASTM A646, MIL SPEC MIL-S-16974, B.S. 817 M 40 (UK), SAE J404, SAE J412, SAE J770, DIN 1.6565, JIS SNCM 8, IS 1570 40Ni2Cr1Mo28, IS 1570 40NiCr1Mo15
Vendors:	No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
Printer friendly version Download as PDF Download to Excel (requires Excel and Windows) Export data to your CAD/FEA program Add to Folder:

Physical Properties	Original Value	Comments

Density	7.85 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	1005 MPa
	1435 MPa @Temperature -195 °C
Tensile Strength, Yield	938 MPa
	1380 MPa @Temperature -195 °C
Elongation at Break	20 %
	20 % @Temperature -195 °C
Reduction of Area	60 %
	44 % @Temperature -195 °C
Modulus of Elasticity	213 GPa
	219 GPa @Temperature -195 °C
Bulk Modulus	160 GPa	Typical for steel.
Poissons Ratio	0.29	Calculated
Machinability	50 %	annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus	82.0 GPa	Estimated from elastic modulus

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000248 ohm-cm @Temperature 20.0 °C
	0.0000298 ohm-cm @Temperature 100 °C
	0.0000552 ohm-cm @Temperature 400 °C
	0.0000797 ohm-cm @Temperature 600 °C

Thermal Properties	Original Value	Comments
CTE, linear	10.4 µm/m-°C @Temperature 20.0 °C	specimen oil hardened, 630°C (1110°F) temper
	11.2 µm/m-°C @Temperature 20.0 °C	specimen oil hardened, 630°C (1110°F) temper
	12.4 µm/m-°C @Temperature 20.0 °C	specimen oil hardened, 630°C (1110°F) temper
	12.6 µm/m-°C @Temperature 21.0 - 260 °C	1.88% Ni, normalized and tempered
	13.6 µm/m-°C @Temperature 250 °C	specimen oil hardened, 630°C (1110°F) temper
	13.7 µm/m-°C @Temperature 21.0 - 540 °C	1.88% Ni, normalized and tempered
	13.9 µm/m-°C @Temperature 21.0 - 540 °C	1.90% Ni, quenched, tempered
	14.3 µm/m-°C @Temperature 500 °C	specimen oil hardened, 630°C (1110°F) temper
Specific Heat Capacity	0.475 J/g-°C	Typical 4000 series steel
Thermal Conductivity	44.5 W/m-K	Typical steel

Component Elements Properties	Original Value	Comments
Carbon, C	0.37 - 0.43 %
Chromium, Cr	0.70 - 0.90 %
Iron, Fe	95.195 - 96.33 %	As remainder
Manganese, Mn	0.60 - 0.80 %
Molybdenum, Mo	0.20 - 0.30 %
Nickel, Ni	1.65 - 2.0 %
Phosphorus, P	<= 0.035 %
Silicon, Si	0.15 - 0.30 %
Sulfur, S	<= 0.040 %

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

Users viewing this material also viewed the following:
AISI 4340 Steel, oil quenched 845°C, 425°C (800°F) temper
AISI 4340 Steel, oil quenched 855°C (1570°F), 230°C (450°F) temper for 4 hrs.
AISI 4340 Steel, oil quenched 800°C (1470°F), 650°C (1200°F) temper, 100 mm
AISI 4340 Steel, oil quenched 800°C (1470°F), 540°C (1000°F) temper, 13 mm (0.5 in.) round
AISI 4340 Steel, oil quenched 830°C (1525°F), 540°C (1000°F) temper, not nitrided

M434AR / 7768

	Advertise with MatWeb!
	Data sheets for over 180,000 metals, plastics, ceramics, and composites.
	HOME • SEARCH • TOOLS • SUPPLIERS • FOLDERS • ABOUT US • FAQ • LOG IN

System Message