Ovako 20MnB4 SB21M10B Steel

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Ovako 20MnB4 SB21M10B Steel
Categories:	Metal; Ferrous Metal; Alloy Steel
Material Notes:	General Information: Grade SB21M10B is a boron steel for general purposes without any specified mechanical properties. Its closest equivalent is found in the EN 10263-4:2001 grade 20MnB4 but with a difference in boron and manganese content. SB21M10B is suitable for use in pegs, chains, simple wear parts and machinery parts as cogwheels and axles in dimensions up to Ø30 mm or equivalent thickness. Information provided by Ovako
Key Words:	SB21M10B - 20MnB4-3, 20MnB5
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Physical Properties	Original Value	Comments

Density	7.80 g/cc

Mechanical Properties	Original Value	Comments
Modulus of Elasticity	210 GPa
Poissons Ratio	0.30
Shear Modulus	80.0 GPa

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	417 °C	MS
	723 °C	AC1
	805 °C	AC3

Component Elements Properties	Original Value	Comments
Boron, B	0.0010 - 0.0060 %
Carbon, C	0.18 - 0.23 %
Chromium, Cr	0.10 - 0.30 %
Iron, Fe	97.94 - 98.67 %	As Balance
Manganese, Mn	0.90 - 1.1 %
Phosphorus, P	<= 0.035 %
Silicon, Si	0.15 - 0.35 %
Sulfur, S	<= 0.035 %

Descriptive Properties
Weldability	CEV 0.43_max
	Pcm 0.3_max

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NOVAKO129 / 234428

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