AISI 4718H Steel, pseudocarburized, reheated to 765°C (1700°F) and oil quenched, 150°C (300°F) temper, 25 mm round

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AISI 4718H Steel, pseudocarburized, reheated to 765°C (1700°F) and oil quenched, 150°C (300°F) temper, 25 mm round
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Full heat treatment: normalized at 925°C (1700°F), machined to 13.7 mm (1 in.), pseudocarburized at 925°C (1700°F) for 8 hours, box cooled to RT, reheated to 765°C (1405°F), 150°C (300°F) temper, machined and tested in 12.8 mm (0.505 in.) rounds
Key Words:	alloy steels, UNS H47180, ASTM A304, SAE J1268, DIN 1.6755
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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	331	331
Hardness, Knoop	359	359	Converted from Brinell
Hardness, Rockwell B	99	99	Converted from Brinell
Hardness, Rockwell C	36	36	Converted from Brinell
Hardness, Vickers	350	350	Converted from Brinell
Tensile Strength, Ultimate	1096 MPa	159000 psi
Tensile Strength, Yield	601 MPa	87200 psi
Elongation at Break	14.5 %	14.5 %
Reduction of Area	36.8 %	36.8 %
Modulus of Elasticity	205 GPa	29700 ksi	Typical for steel
Bulk Modulus	160 GPa	23200 ksi	Typical for steel.
Poissons Ratio	0.29	0.29	Calculated
Shear Modulus	80.0 GPa	11600 ksi	Typical for steel

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000245 ohm-cm	0.0000245 ohm-cm	Typical 4000 series steel

Thermal Properties	Metric	English	Comments
Specific Heat Capacity	0.475 J/g-°C	0.114 BTU/lb-°F	Typical 4000 series steel
Thermal Conductivity	44.5 W/m-K	309 BTU-in/hr-ft²-°F	Typical steel

Component Elements Properties	Metric	English	Comments
Carbon, C	0.15 - 0.21 %	0.15 - 0.21 %
Chromium, Cr	0.30 - 0.60 %	0.30 - 0.60 %
Iron, Fe	96.21 - 97.65 %	96.21 - 97.65 %	As remainder
Manganese, Mn	0.60 - 0.95 %	0.60 - 0.95 %
Molybdenum, Mo	0.30 - 0.40 %	0.30 - 0.40 %
Nickel, Ni	0.85 - 1.25 %	0.85 - 1.25 %
Phosphorus, P	<= 0.040 %	<= 0.040 %
Silicon, Si	0.15 - 0.30 %	0.15 - 0.30 %
Sulfur, S	<= 0.040 %	<= 0.040 %

References for this datasheet.

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M4718I / 7942

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