AISI 8620 Steel, normalized, machined to 13.7 mm, pseudocarburized, reheated to 775°C, 150°C temper

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AISI 8620 Steel, normalized, machined to 13.7 mm, pseudocarburized, reheated to 775°C, 150°C temper
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 8000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	AISI 8620 is a common, carburizing alloy steel used for a variety of medium-strength applications including gears, camshafts, fasteners, and chains/chain pins. Flexibility in hardening treatments allow optimization of case/core properties. Specific conditions for property data below: Normalized in 32 mm rounds, machined to 13.7 mm, pseudocarburized at 925°C (1700°F) for 8 hrs., box cooled to room temperature, reheated to 775°C (1430°F), oil quenched, 150°C (300°F) temper. Tested in 12.8 mm rounds. Core properties.
Key Words:	AFNOR 22 NCD 2, UNI 20 NiCrMo 2, JIS SNCM 21 H, JIS SNCM 21, B.S. 805 H 20 (UK), B.S. 805 M 20 (UK), MIL SPEC MIL-S-16794, SAE J404, SAE J770, DIN 1.6523, AFNOR 20 NCD 2 (France), UNS G86200, AMS 6274, AMS 6276, AMS 6277, ASTM A322, ASTM A331, ASTM A505, ASTM A513
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Physical Properties	Metric	English	Comments

Density	7.85 g/cc	0.284 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	285	285
Hardness, Knoop	311	311	Converted from Brinell
Hardness, Rockwell B	99	99	Converted from Brinell
Hardness, Rockwell C	30	30	Converted from Brinell
Hardness, Vickers	301	301	Converted from Brinell
Tensile Strength, Ultimate	938 MPa	136000 psi
Tensile Strength, Yield	772 MPa	112000 psi
Elongation at Break	15 %	15 %	in 50 mm.
Reduction of Area	49 %	49 %
Modulus of Elasticity	205 GPa	29700 ksi	Typical for steel
Bulk Modulus	160 GPa	23200 ksi	Typical for steels
Poissons Ratio	0.29	0.29	Calculated
Machinability	65 %	65 %	hot rolled and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus	80.0 GPa	11600 ksi	Typical for steel

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000234 ohm-cm	0.0000234 ohm-cm	Typical steel

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	0.475 J/g-°C	0.114 BTU/lb-°F	Typical steel
Thermal Conductivity	46.6 W/m-K	323 BTU-in/hr-ft²-°F	Typical steel

Component Elements Properties	Metric	English	Comments
Carbon, C	0.18 - 0.23 %	0.18 - 0.23 %
Chromium, Cr	0.40 - 0.60 %	0.40 - 0.60 %
Iron, Fe	96.895 - 98.02 %	96.895 - 98.02 %	As remainder
Manganese, Mn	0.70 - 0.90 %	0.70 - 0.90 %
Molybdenum, Mo	0.15 - 0.25 %	0.15 - 0.25 %
Nickel, Ni	0.40 - 0.70 %	0.40 - 0.70 %
Phosphorus, P	<= 0.035 %	<= 0.035 %
Silicon, Si	0.15 - 0.35 %	0.15 - 0.35 %
Sulfur, S	<= 0.040 %	<= 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 view all the property values for this datasheet as they were originally entered into MatWeb.

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M862AX / 8304

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