Ovako 55Cr3 SB9257 Steel, +AR

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Ovako 55Cr3 SB9257 Steel, +AR
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 5000 Series Steel
Material Notes:	General Information: 55Cr3 according to Ovako standard is a chromium spring steel with a dash of niobium to be used in quenched and tempered condition; suitable application is for example stabilizer bars. Information provided by Ovako
Key Words:	SB 9257 - 54Cr3, WNr 1.7176, DIN 55Cr3, 527A60, GOST 50ChGA, AISI/SAE/ASTM 5155, 5160
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Physical Properties	Metric	English	Comments

Density	7.80 g/cc	0.282 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	<= 330 @Thickness <=30.0 mm	<= 330 @Thickness <=1.18 in	Round bar
Tensile Strength	640 MPa @Thickness <=30.0 mm	92800 psi @Thickness <=1.18 in	Round bar
Tensile Strength, Yield	>= 640 MPa @Thickness <=30.0 mm	>= 92800 psi @Thickness <=1.18 in	R_eh, Round bar
Elongation at Break	17 % @Thickness <=30.0 mm	17 % @Thickness <=1.18 in	Round bar
Modulus of Elasticity	210 GPa	30500 ksi
Poissons Ratio	0.30	0.30
Shear Modulus	80.0 GPa	11600 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000200 - 0.00000250 ohm-cm	0.00000200 - 0.00000250 ohm-cm

Thermal Properties	Metric	English	Comments
CTE, linear	12.0 µm/m-°C @Temperature 20.0 - 300 °C	6.67 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.460 - 0.480 J/g-°C @Temperature 50.0 - 100 °C	0.110 - 0.115 BTU/lb-°F @Temperature 122 - 212 °F
Thermal Conductivity	40.0 - 45.0 W/m-K	278 - 312 BTU-in/hr-ft²-°F	Ambient temperature
Transformation Temperature	263 °C	505 °F	MS
	734 °C	1350 °F	AC1
	763 °C	1410 °F	AC3

Component Elements Properties	Metric	English	Comments
Aluminum, Al	0.015 - 0.035 %	0.015 - 0.035 %
Carbon, C	0.53 - 0.56 %	0.53 - 0.56 %
Chromium, Cr	0.70 - 0.80 %	0.70 - 0.80 %
Iron, Fe	98.36 - 98.42 %	98.36 - 98.42 %	As Balance
Manganese, Mn	>= 0.30 %	>= 0.30 %
Niobium, Nb (Columbium, Cb)	0.025 - 0.035 %	0.025 - 0.035 %
Phosphorus, P	<= 0.015 %	<= 0.015 %
Silicon, Si	<= 0.15 %	<= 0.15 %
Sulfur, S	<= 0.015 %	<= 0.015 %
Titanium, Ti	0.010 - 0.030 %	0.010 - 0.030 %

Descriptive Properties
Weldability	CEV 0.92_max
	Pcm 0.67_max

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