Ovako 28MnB5 Steel

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Ovako 28MnB5 Steel
Categories:	Metal; Ferrous Metal; Alloy Steel
Material Notes:	General Information: Grade SB27M12Bm is boron steel used in quenched and tempered condition. The material is suitable for moderately or highly stressed parts such as wear parts on agricultural, forestry and excavators. The grade has tighter chemical analysis than grade SB27M12CB and is recommended for thickness =15 mm. Its closest equivalent is 28MnB5 (1.0871). Information provided by Ovako
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Physical Properties	Metric	English	Comments

Density	7.80 g/cc	0.282 lb/in³

Mechanical Properties	Metric	English	Comments
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	379 °C	714 °F	MS
	720 °C	1330 °F	AC1
	784 °C	1440 °F	AC3

Component Elements Properties	Metric	English	Comments
Aluminum, Al	<= 0.020 %	<= 0.020 %
Boron, B	0.00080 - 0.0050 %	0.00080 - 0.0050 %
Carbon, C	0.25 - 0.32 %	0.25 - 0.32 %
Chromium, Cr	<= 0.30 %	<= 0.30 %
Iron, Fe	97.39 - 98.6 %	97.39 - 98.6 %	As Balance
Manganese, Mn	1.0 - 1.5 %	1.0 - 1.5 %
Phosphorus, P	<= 0.035 %	<= 0.035 %
Silicon, Si	0.15 - 0.40 %	0.15 - 0.40 %
Sulfur, S	<= 0.035 %	<= 0.035 %

Descriptive Properties
Weldability	CEV 0.57_max
	Pcm 0.4_max

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NOVAKO218 / 234517

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