Ovako 20NiCrMoS2-2 4542 Steel, +A

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Ovako 20NiCrMoS2-2 4542 Steel, +A
Categories:	Metal; Ferrous Metal; Alloy Steel; AISI 8000 Series Steel
Material Notes:	General Information: Alloyed case hardening steel for very high strained parts and good toughness at core tensile strength of 700 - 900 MPa. Driving bevel gears, crown wheels, gears, shafts, bolts for automotive and gear components. Suitable for direct hardening. Information provided by Ovako
Key Words:	20NiCrMo2-2, MoCN206 M, SAE 8620, BS 805H22, 20NCD2, SS2506
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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	<= 212 @Thickness <=160 mm	<= 212 @Thickness <=6.30 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	400 °C	752 °F	MS
	723 °C	1330 °F	AC1
	827 °C	1520 °F	AC3

Component Elements Properties	Metric	English	Comments
Carbon, C	0.17 - 0.23 %	0.17 - 0.23 %
Chromium, Cr	0.35 - 0.70 %	0.35 - 0.70 %
Iron, Fe	96.7 - 98.23 %	96.7 - 98.23 %	As Balance
Manganese, Mn	0.60 - 0.95 %	0.60 - 0.95 %
Molybdenum, Mo	0.15 - 0.25 %	0.15 - 0.25 %
Nickel, Ni	0.35 - 0.75 %	0.35 - 0.75 %
Phosphorus, P	0.00 - 0.035 %	0.00 - 0.035 %
Silicon, Si	0.15 - 0.35 %	0.15 - 0.35 %
Sulfur, S	0.00 - 0.035 %	0.00 - 0.035 %

Descriptive Properties
Weldability	CEV 0.581_max
	Pcm 0.36_max

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NOVAKO161 / 234460

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