AISI 8617 Steel, heat treated, machined, pseudocarburized, reheated to 855°C (1570°F), 150°C (300°F) temper

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AISI 8617 Steel, heat treated, machined, pseudocarburized, reheated to 855°C (1570°F), 150°C (300°F) temper
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 8000 Series Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel
Material Notes:	Normalized 925°C (1700°F) in 32 mm rounds, machined to 25 or 13.7 mm rounds, pseudocarburized at 925°C (1700°F) for 8 hours, box cooled to room temperature, reheated to 855°C (1570°F), oil quenched, 150°C (300°F) temper, tested in 12.8 mm rounds. Post oil quenched hardness 25 mm: 302 HB at 7/8 radius, 265 HB at half-radius, 258 HB at center; 50 mm: 235 HB at 7/8 radius, 215 HB at half-radius, 207 HB at center
Key Words:	DIN 1.6523, AFNOR 20 NCD 2 (Fr), AFNOR 22 NCD 2 (Fr), UNI NiCrMo 2, JIS SNCM 21 H, JIS SNCM 21, B.S. 805 H 20, B.S. 805 M 20, UNS G86170, ASTM A322, ASTM A331, ASTM A505, AMS 6272, SAE J404, 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	248	248
Hardness, Knoop	272	272	Converted from Brinell
Hardness, Rockwell B	98	98	Converted from Brinell
Hardness, Rockwell C	23	23	Converted from Brinell
Hardness, Vickers	261	261	Converted from Brinell
Tensile Strength, Ultimate	834 MPa	121000 psi
Tensile Strength, Yield	625 MPa	90600 psi
Elongation at Break	19 %	19 %	in 50 mm
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	70 %	70 %	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	0.15 - 0.20 %	0.15 - 0.20 %
Chromium, Cr	0.40 - 0.60 %	0.40 - 0.60 %
Iron, Fe	96.975 - 98.05 %	96.975 - 98.05 %	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 - 0.30 %	0.15 - 0.30 %
Sulfur, S	<= 0.040 %	<= 0.040 %

References for this datasheet.

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M861BB / 8274

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