Ovako 18CrMo8-5* 225A Steel, Hardening

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Ovako 18CrMo8-5* 225A Steel, Hardening
Categories:	Metal; Ferrous Metal; Alloy Steel
Material Notes:	General Information: Ovako 225 is a steel specially designed for nitriding but is also suitable for carburizing or applications requiring quenched and tempered steels. High nitriding rate Suitable for nitriding, case carburizing or quench and tempering Also suitable for applications require quenched and tempered steel in bars with diameter 25-160 mm. Weldable under certain conditions Variant 225A - Standard quality Variant 225C - With a reduced sulphur content for a reduced number of sulphide inclusions Information provided by Ovako
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Physical Properties	Original Value	Comments

Density	7.80 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	255 - 320 @Thickness <=120 mm
	265 - 320 @Thickness 80.0 - 120 mm
	265 - 320 @Thickness 80.0 - 120 mm
	275 - 330 @Thickness 80.0 mm
	275 - 330 @Thickness >=80.0 mm
Tensile Strength	>= 840 MPa @Thickness <=120 mm
	>= 860 MPa @Thickness 80.0 - 120 mm
	>= 860 MPa @Thickness 80.0 - 120 mm
	>= 880 MPa @Thickness 80.0 mm
	>= 880 MPa @Thickness >=80.0 mm
Tensile Strength, Yield	>= 740 MPa @Thickness <=120 mm	R_eh
	>= 760 MPa @Thickness 80.0 - 120 mm	R_eh
	>= 760 MPa @Thickness 80.0 - 120 mm	R_eh
	>= 800 MPa @Thickness 80.0 mm	R_eh
	>= 800 MPa @Thickness >=80.0 mm	R_eh
Elongation at Break	12 % @Thickness 80.0 mm
	12 % @Thickness >=80.0 mm
	12 % @Thickness 80.0 - 120 mm
	12 % @Thickness 80.0 - 120 mm
	12 % @Thickness <=120 mm
Reduction of Area	55 % @Thickness 80.0 mm
	55 % @Thickness >=80.0 mm
	55 % @Thickness 80.0 - 120 mm
	55 % @Thickness 80.0 - 120 mm
	55 % @Thickness <=120 mm
Modulus of Elasticity	210 GPa
Poissons Ratio	0.30
Shear Modulus	80.0 GPa
Impact Test	27.0 J @Thickness 80.0 - 120 mm, Temperature -20.0 °C
	40.0 J @Thickness <=120 mm, Temperature 20.0 °C
	40.0 J @Thickness >=80.0 mm, Temperature -20.0 °C
	60.0 J @Thickness 80.0 - 120 mm, Temperature 20.0 °C
	80.0 J @Thickness 80.0 mm, Temperature 20.0 °C

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000200 - 0.00000250 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	12.0 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.460 - 0.480 J/g-°C @Temperature 50.0 - 100 °C
Thermal Conductivity	40.0 - 45.0 W/m-K	Ambient temperature
Transformation Temperature	416 °C	MS
	751 °C	AC1
	853 °C	AC3

Component Elements Properties	Original Value	Comments
Carbon, C	0.16 - 0.19 %
Chromium, Cr	1.75 - 2.0 %
Iron, Fe	95.36 - 96.62 %	As Balance
Manganese, Mn	0.75 - 1.0 %
Molybdenum, Mo	0.50 - 0.60 %
Nickel, Ni	<= 0.30 %
Phosphorus, P	<= 0.020 %
Silicon, Si	0.20 - 0.40 %
Sulfur, S	0.020 - 0.030 %
Vanadium, V	<= 0.10 %

Descriptive Properties
Weldability	CEV 0.94_max
	Pcm 0.42_max

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NOVAKO096 / 234395

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