AISI 4142 Steel, Annealed and Cold Drawn

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AISI 4142 Steel, Annealed and Cold Drawn
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Material Notes:	General processing of AISI 4142: Oil quenched. Forging temp.: 1205°C (2200°F) max. Annealing temp.: 790 - 845°C. Hardening temp.: 845 - 870°C. Tempered to desired hardness. Medium hardenability. Applications include break dies, bending dies, support tooling, die holders, gears, flanges, collets, arbors, spindles, axles, clutch parts, forming rolls, wrenches and other hand tools, and various machine tool components.
Key Words:	UNS G41420, ASTM A322, ASTM A331, ASTM A505, ASTM A519, ASTM A547, SAE J404, SAE J412, SAE J770
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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	187 - 229	187 - 229
Hardness, Knoop	230	230	Converted from Brinell
Hardness, Rockwell B	94	94	Converted from Brinell
Hardness, Rockwell C	15	15	Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers	218	218	Converted from Brinell
Modulus of Elasticity	206 GPa	29900 ksi
Bulk Modulus	163 GPa	23600 ksi	Estimated from elastic modulus
Poissons Ratio	0.29	0.29	Typical for steel
Machinability	65 %	65 %	annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus	80.0 GPa	11600 ksi	Estimated from elastic modulus

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000263 ohm-cm	0.0000263 ohm-cm

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	0.473 J/g-°C	0.113 BTU/lb-°F
Thermal Conductivity	42.6 W/m-K	296 BTU-in/hr-ft²-°F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.40 - 0.45 %	0.40 - 0.45 %
Chromium, Cr	0.80 - 1.1 %	0.80 - 1.1 %
Iron, Fe	>= 96.725 %	>= 96.725 %	As remainder
Manganese, Mn	0.75 - 1.1 %	0.75 - 1.1 %
Molybdenum, Mo	0.15 - 0.25 %	0.15 - 0.25 %
Phosphorus, P	<= 0.035 %	<= 0.035 %
Silicon, Si	0.15 - 0.30 %	0.15 - 0.30 %
Sulfur, S	<= 0.040 %	<= 0.040 %

References for this datasheet.

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M4142A / 7554

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