CBS-600 Carburizing Bearing and Gear Steel

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CBS-600 Carburizing Bearing and Gear Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Carbon Steel; High Carbon Steel
Material Notes:	CBS-600 VIM-VAR is a carburizing bearing and gear steel designed for service temperatures up to 600°F. Information provided by Latrobe and the reference(s).
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Physical Properties	Original Value	Comments

Density	0.282 lb/in³

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	41	core layer, 0.20% C; oil-quenched from 1095°C (2000°F)
	62	case layer, 0.7 to 1.0% C; oil-quenched from 1095°C (2000°F)
Tensile Strength, Ultimate	220 ksi	24°C Test Temp
Tensile Strength, Yield	1250 MPa @Strain 0.2 %	24°C Test Temp; 927°C Hardening Temp
	1265 MPa @Strain 0.2 %	24°C Test Temp; 843°C Hardening Temp
	965 MPa @Strain 0.2 %, Temperature 371 °C	843°C Hardening Temp
	1020 MPa @Strain 0.2 %, Temperature 371 °C	927°C Hardening Temp
Elongation at Break	11.4 %	24°C Test Temp; 843°C Hardening Temp
	12.5 %	24°C Test Temp; 927°C Hardening Temp
	17.5 % @Temperature 371 °C	843°C Hardening Temp
	18.2 % @Temperature 371 °C	927°C Hardening Temp
Reduction of Area	43.5 %	after 843°C Hardening Temp
	54.9 %	after 927°C Hardening Temp
	53.6 % @Temperature 371 °C
Modulus of Elasticity	30500 ksi
	24900 ksi @Temperature 550.0 °C
Poissons Ratio	0.292 @Temperature 20.0 °C
	0.309 @Temperature 550.0 °C
Fracture Toughness	42.0 - 52.0 ksi-in½	cracks originating in case; case depth 0.30 to 0.35 in.
	74.0 - 91.0 ksi-in½	cracks originating in core
Shear Modulus	9300 ksi @Temperature 538 °C
	11850 ksi @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	12.7 µm/m-°C @Temperature 21.0 - 204 °C	0.20%C
	12.8 µm/m-°C @Temperature 21.0 - 427 °C	0.20%C
Specific Heat Capacity	0.118 BTU/lb-°F @Temperature 20.0 °C
	0.166 BTU/lb-°F @Temperature 550.0 °C
Thermal Conductivity	33.9 W/m-K @Temperature 550.0 °C
	48.6 W/m-K @Temperature 20.0 °C
Maximum Service Temperature, Air	600 °F

Processing Properties	Original Value	Comments
Processing Temperature	729 °C	Critical Temperature Case Ac1
	729 °C	Critical Temperature Core Ac1
	802 °C	Critical Temperature Case Ac3
	885 °C	Critical Temperature Core Ac3

Component Elements Properties	Original Value	Comments
Aluminum, Al	0.060 %
Carbon, C	0.19 %
Chromium, Cr	1.45 %
Iron, Fe	95.6 %
Manganese, Mn	0.60 %
Molybdenum, Mo	1.0 %
Silicon, Si	1.1 %

References for this datasheet.

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