Assab Steels DF-3 Cold Work Steel

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Assab Steels DF-3 Cold Work Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Cold Work Steel; Oil-Hardening Steel
Material Notes:	DF-3 general purpose oil-hardening tool steel is a versatile manganese-chromium-tungsten steel suitable for a wide variety of cold-work applications. Its main characteristics include: Good machinability Good dimensional stability in hardening A good combination of high surface hardness and toughness after hardening and tempering. These characteristics combine to give a steel suitable for the manufacture of tooling with good tool-life and high production economy. DF-3 can be supplied in various finishes including hot-rolled, pre-machined, fine-machined and precision ground. It is also available in the form of hollow bar. AISI 01
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Physical Properties	Metric	English	Comments

Density	7.81 g/cc	0.282 lb/in³
	7.70 g/cc @Temperature 400 °C	0.278 lb/in³ @Temperature 752 °F
	7.75 g/cc @Temperature 200 °C	0.280 lb/in³ @Temperature 392 °F

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell C	38.5	38.5	790°C Austenitizing temperature, for tempering at 550°C
	42	42	820°C Austenitizing temperature, for tempering at 550°C
	58	58	790°C Austenitizing temperature, for tempering at 250°C
	60	60	820°C Austenitizing temperature, for tempering at 250°C
	62	62	Hardened and tempered.
	63	63	780°C hardening temp
	64	64	At 860°C hardening temp
	64.6	64.6	820°C hardening temp
Modulus of Elasticity	190 GPa	27600 ksi
	170 GPa @Temperature 400 °C	24700 ksi @Temperature 752 °F
Compressive Strength	1250 MPa	181000 psi	HRC 45 R_c0.2
	1700 MPa	247000 psi	HRC 45 R_cm
	2050 MPa	297000 psi	HRC 55 R_c0.2
	2250 MPa	326000 psi	HRC 62 R_c0.2
	2450 MPa	355000 psi	HRC 55 R_cm
	3050 MPa	442000 psi	HRC 62 R_cm

Thermal Properties	Metric	English	Comments
CTE, linear	11.4 µm/m-°C @Temperature 20.0 - 400 °C	6.33 µin/in-°F @Temperature 68.0 - 752 °F
	11.7 µm/m-°C @Temperature 20.0 - 200 °C	6.50 µin/in-°F @Temperature 68.0 - 392 °F
Specific Heat Capacity	0.460 J/g-°C @Temperature 20.0 °C	0.110 BTU/lb-°F @Temperature 68.0 °F
Thermal Conductivity	32.0 W/m-K @Temperature 20.0 °C	222 BTU-in/hr-ft²-°F @Temperature 68.0 °F
	33.0 W/m-K @Temperature 200 °C	229 BTU-in/hr-ft²-°F @Temperature 392 °F
	34.0 W/m-K @Temperature 400 °C	236 BTU-in/hr-ft²-°F @Temperature 752 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	0.90 %	0.90 %
Chromium, Cr	0.85 %	0.85 %
Iron, Fe	96.5 %	96.5 %
Manganese, Mn	1.2 %	1.2 %
Tungsten, W	0.55 %	0.55 %

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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NASSAB00 / 15018

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