Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel

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Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel (discontinued **)
Categories:	Metal; Ferrous Metal; Alloy Steel; Chrome-moly Steel; Tool Steel; Cold Work Steel
Material Notes:	Chromium-molybdenum-vanadium alloyed steel The ROLTEC SF steel grade is a high alloyed spray formed cold work tool steel offering a combination of high wear resistance, good resistance to cracking, and high compressive strength. The properties and manufacturing process make ROLTEC SF suitable for the production of forming rolls and slitter/shearing knives. ROLTEC SF is characterized by: High wear resistance High compressive strength High toughness Good dimensional stability at heat treatment and in service Very good through hardening properties Very good resistance to tempering back Good WEDM properties Good surface treatment properties
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Physical Properties	Metric	English	Comments

Density	7.64 g/cc	0.276 lb/in³	hardened to 62 HRC

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	240	240	Soft annealed (Delivery condition)
Hardness, Rockwell C	45 - 66	45 - 66	temper temp 210-1290°F (2 x 2h)
Modulus of Elasticity	215 GPa	31200 ksi	(hardened to 62 HRC)
	185 GPa @Temperature 399 °C	26800 ksi @Temperature 750 °F	hardened to 62 HRC
	196 GPa @Temperature 199 °C	28400 ksi @Temperature 390 °F	hardened to 62 HRC
Compressive Yield Strength	1550 MPa	225000 psi	0.2%, hardened to 50 HRC
	2550 MPa	370000 psi	0.2%, hardened to 60 HRC
	2950 MPa	428000 psi	0.2%, hardened to 64 HRC

Thermal Properties	Metric	English	Comments
CTE, linear	11.3 µm/m-°C @Temperature 199 °C	6.30 µin/in-°F @Temperature 390 °F	hardened to 62 HRC
	12.1 µm/m-°C @Temperature 399 °C	6.70 µin/in-°F @Temperature 750 °F	hardened to 62 HRC
Specific Heat Capacity	0.460 J/g-°C	0.110 BTU/lb-°F	hardened to 62 HRC
Thermal Conductivity	25.0 W/m-K @Temperature 199 °C	174 BTU-in/hr-ft²-°F @Temperature 390 °F	hardened to 62 HRC
	27.0 W/m-K @Temperature 399 °C	187 BTU-in/hr-ft²-°F @Temperature 750 °F	hardened to 62 HRC

Component Elements Properties	Metric	English	Comments
Carbon, C	1.4 %	1.4 %
Chromium, Cr	4.6 %	4.6 %
Iron, Fe	85.5 %	85.5 %	As Balance
Manganese, Mn	0.60 %	0.60 %
Molybdenum, Mo	3.2 %	3.2 %
Silicon, Si	1.0 %	1.0 %
Vanadium, V	3.7 %	3.7 %

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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NBUCOR37 / 15506

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