Astralloy 4800® Wear Resistant Steel

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Astralloy 4800® Wear Resistant Steel
Categories:	Metal; Ferrous Metal; Tool Steel
Material Notes:	Astralloy 4800® is a wear resistant steel offering up to 50% additional in service life compared with a 400 HB water quenched steel. The steel combines several metallurgical concepts which, depending on thickness, use different combinations of an enriched chemical analysis (Cr, Mo, Ti) and controlled quenching rate. Astralloy 4800 is designed to provide the optimum combination of wear resistance, controlled hardness and ease of processing. Rather than just using a high hardness level, it achieves this state by using proven and controlled metallurgical mechanisms, which are more complex but more efficient than the simple effect of hardness alone: Work-hardening and Cr Mo micro-carbides TRIP (Transformation Induced by Plasticity) effect originally developed with Astralloy 8000 Reinforcement of the structure with titanium carbides The limited hardness of Astralloy 4800 makes processing operations like cutting, machining and forming no more difficult than processing 400HB water quenched steel. Astralloy 4800 is ideal for applications in mines and quarries, cement and the steelmaking industries, publics works and agricultural machinery. It is suitable for all types of abrasion, sliding or impact, dry or wet media, including high temperature abrasion up to 350°C (660°F). Information provided by Astralloy, a Nucor Company.
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Mechanical Properties	Original Value	Comments

Hardness, Brinell	370
Tensile Strength	174 ksi
	650 MPa @Temperature 600 °C
	900 MPa @Temperature 500 °C
	1100 MPa @Temperature 400 °C
	1200 MPa @Temperature 100 °C
	1250 MPa @Temperature 200 °C
	1300 MPa @Temperature 300 °C
Tensile Strength, Yield	130 ksi
	600 MPa @Temperature 600 °C
	900 MPa @Temperature 500 °C
	950 MPa @Temperature 400 °C
	1000 MPa @Temperature 100 °C
	1000 MPa @Temperature 300 °C
	1050 MPa @Temperature 200 °C
Elongation at Break	11 % @Temperature 100 °C	in 5d
	12 % @Temperature 200 °C	in 5d
	13 % @Temperature 500 °C	in 5d
	14 % @Temperature 300 °C	in 5d
	14 % @Temperature 400 °C	in 5d
	18 % @Temperature 600 °C	in 5d
	12 % @Thickness 50.8 mm, Temperature 20.0 °C	in 2"
Charpy Impact	27.0 ft-lb
Bend Radius, Minimum	3.0 t	Perpendicular to Rolling Direction
	4.0 t	Parallel to Grain Rolling Direction

Thermal Properties	Original Value	Comments
CTE, linear	12.4 µm/m-°C @Temperature 20.0 - 100 °C
	13.1 µm/m-°C @Temperature 20.0 - 200 °C
	13.9 µm/m-°C @Temperature 20.0 - 300 °C
	14.4 µm/m-°C @Temperature 20.0 - 400 °C
	14.7 µm/m-°C @Temperature 20.0 - 500 °C
	15.0 µm/m-°C @Temperature 20.0 - 600 °C
Maximum Service Temperature, Air	350 °C	Retains Abrasion Resistance

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.20 %
Chromium, Cr	<= 1.9 %
Iron, Fe	95.5 - 99.8 %	As Balance
Manganese, Mn	<= 1.6 %
Molybdenum, Mo	<= 0.40 %
Nickel, Ni	<= 0.20 %
Other	<= 0.20 %
Phosphorus, P	<= 0.018 %
Sulfur, S	<= 0.0050 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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NNUCOR902 / 233176

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