Overview of materials for Air-Hardening Steel

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Overview of materials for Air-Hardening Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Air-Hardening Steel
Material Notes:	This property data is a summary of similar materials in the MatWeb database for the category "Air-Hardening Steel". Each property range of values reported is minimum and maximum values of appropriate MatWeb entries. The comments report the average value, and number of data points used to calculate the average. The values are not necessarily typical of any specific grade, especially less common values and those that can be most affected by additives or processing methods.
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Physical Properties	Metric	English	Comments

Density	7.39 - 8.03 g/cc	0.267 - 0.290 lb/in³	Average value: 7.76 g/cc Grade Count:52

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	192 - 594	192 - 594	Average value: 354 Grade Count:16
Hardness, Knoop	431 - 724	431 - 724	Average value: 604 Grade Count:8
Hardness, Rockwell C	10.0 - 66.5	10.0 - 66.5	Average value: 56.8 Grade Count:44
Hardness, Vickers	200 - 703	200 - 703	Average value: 513 Grade Count:10
Tensile Strength, Ultimate	610 - 2380 MPa	88500 - 345000 psi	Average value: 1780 MPa Grade Count:15
Tensile Strength, Yield	470 - 2100 MPa	68200 - 305000 psi	Average value: 1460 MPa Grade Count:15
Elongation at Break	1.00 - 15.0 %	1.00 - 15.0 %	Average value: 8.91 % Grade Count:15
Reduction of Area	2.00 - 65.0 %	2.00 - 65.0 %	Average value: 32.4 % Grade Count:10
Modulus of Elasticity	138 - 221 GPa	20000 - 32100 ksi	Average value: 202 GPa Grade Count:29
Bulk Modulus	160 GPa	23200 ksi	Average value: 160 GPa Grade Count:10
Poissons Ratio	0.300	0.300	Average value: 0.300 Grade Count:3
Machinability	30.0 - 80.0 %	30.0 - 80.0 %	Average value: 60.9 % Grade Count:25
Shear Modulus	77.0 - 80.0 GPa	11200 - 11600 ksi	Average value: 79.3 GPa Grade Count:10
Izod Impact Unnotched	10.8 - 229 J	8.00 - 169 ft-lb	Average value: 66.8 J Grade Count:6
Charpy Impact	6.10 - 205 J	4.50 - 151 ft-lb	Average value: 45.6 J Grade Count:15

Thermal Properties	Metric	English	Comments
CTE, linear	7.45 - 14.7 µm/m-°C	4.14 - 8.17 µin/in-°F	Average value: 12.3 µm/m-°C Grade Count:29
Thermal Conductivity	20.4 - 32.9 W/m-K	142 - 228 BTU-in/hr-ft²-°F	Average value: 26.2 W/m-K Grade Count:7
Transformation Temperature	785 - 857 °C	1450 - 1570 °F	Average value: 843 °C Grade Count:5

Processing Properties	Metric	English	Comments
Processing Temperature	150 - 1550 °C	302 - 2830 °F	Average value: 735 °C Grade Count:18
Annealing Temperature	730 - 900 °C	1350 - 1650 °F	Average value: 831 °C Grade Count:10

Component Elements Properties	Metric	English	Comments
Aluminum, Al	2.00 - 7.00 %	2.00 - 7.00 %	Average value: 4.00 % Grade Count:3
Carbon, C	0.230 - 2.85 %	0.230 - 2.85 %	Average value: 1.00 % Grade Count:54
Chromium, Cr	0.400 - 27.0 %	0.400 - 27.0 %	Average value: 6.83 % Grade Count:56
Cobalt, Co	2.80 - 30.0 %	2.80 - 30.0 %	Average value: 15.9 % Grade Count:6
Copper, Cu	0.250 %	0.250 %	Average value: 0.250 % Grade Count:4
Iron, Fe	19.0 - 98.6 %	19.0 - 98.6 %	Average value: 85.3 % Grade Count:59
Manganese, Mn	0.250 - 3.00 %	0.250 - 3.00 %	Average value: 0.796 % Grade Count:46
Molybdenum, Mo	0.330 - 5.50 %	0.330 - 5.50 %	Average value: 1.45 % Grade Count:55
Nickel, Ni	0.250 - 22.0 %	0.250 - 22.0 %	Average value: 5.13 % Grade Count:13
Phosphorus, P	0.00150 - 0.300 %	0.00150 - 0.300 %	Average value: 0.0442 % Grade Count:17
Silicon, Si	0.100 - 1.25 %	0.100 - 1.25 %	Average value: 0.707 % Grade Count:45
Sulfur, S	0.00300 - 0.0900 %	0.00300 - 0.0900 %	Average value: 0.0249 % Grade Count:21
Titanium, Ti	0.500 - 4.00 %	0.500 - 4.00 %	Average value: 2.13 % Grade Count:3
Tungsten, W	0.500 - 8.50 %	0.500 - 8.50 %	Average value: 2.20 % Grade Count:12
Vanadium, V	0.130 - 10.3 %	0.130 - 10.3 %	Average value: 2.09 % Grade Count:35

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 view all the property values for this datasheet as they were originally entered into MatWeb.

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