AISI 4150H Steel, annealed at 830°C (1525°F), furnace cooled 11°C (20°F)/hour, air cooled, 25 mm (1 in.) round

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AISI 4150H Steel, annealed at 830°C (1525°F), furnace cooled 11°C (20°F)/hour, air cooled, 25 mm (1 in.) round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Material Notes:	annealed (heated to 830°C, furnace cooled 11°C/hr, air cooled) AISI 4150 is notable for increased hardenability with a small tradeoff in machinability. Best strength and hardness appears in preheat-treated condition. Tailoring carbon content to bar size allows uniform physical attributes to be maintained across a variety of sizes.
Key Words:	UNS H41500, Chromium-molybdenum steels
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Physical Properties	Original Value	Comments

Density	7.85 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	197
Hardness, Knoop	219	Converted from Brinell
Hardness, Rockwell B	92	Converted from Brinell
Hardness, Rockwell C	13	Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers	207	Converted from Brinell
Tensile Strength, Ultimate	731 MPa
Tensile Strength, Yield	380 MPa
Elongation at Break	20.2 %	in 50 mm
Reduction of Area	40.2 %
Modulus of Elasticity	205 GPa	Typical for steel
Bulk Modulus	160 GPa	Typical for steels
Poissons Ratio	0.29	Calculated
Machinability	55 %	annealed and cold drawn; based on AISI 1212 as 100% machinability
Shear Modulus	80.0 GPa	Typical for steels

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000245 ohm-cm	Typical 4000 series steel

Thermal Properties	Original Value	Comments
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	0.47 - 0.54 %
Chromium, Cr	0.75 - 1.2 %
Iron, Fe	96.535 - 97.83 %	As remainder
Manganese, Mn	0.65 - 1.1 %
Molybdenum, Mo	0.15 - 0.25 %
Phosphorus, P	<= 0.035 %
Silicon, Si	0.15 - 0.30 %
Sulfur, S	<= 0.040 %

References for this datasheet.

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M4150K / 7611

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