AISI 4150H Steel, normalized at 870°C (1600°F), air cooled, 100 mm (4 in.) round

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AISI 4150H Steel, normalized at 870°C (1600°F), air cooled, 100 mm (4 in.) round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Medium Carbon Steel
Material Notes:	Normalized (heated to 870°C, 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:	Chromium-molybdenum steels, UNS H41500, ASTM A304, SAE J1268, DIN 1.7228, JIS SCM 5, JIS SCM 5 H
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Physical Properties	Original Value	Comments

Density	7.85 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	293
Hardness, Knoop	319	Converted from Brinell
Hardness, Rockwell B	99	Converted from Brinell
Hardness, Rockwell C	31	Converted from Brinell
Hardness, Vickers	309	Converted from Brinell
Tensile Strength, Ultimate	1005 MPa
Tensile Strength, Yield	635 MPa
Elongation at Break	19.5 %	in 50 mm
Reduction of Area	56.5 %
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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M4150O / 7615

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