Bohler-Uddeholm,ROLTEC SF Cold Work Tool Steel Flange

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Böhler-Uddeholm ROLTEC SF Cold Work Tool Steel** ## **Product Overview** **Böhler-Uddeholm ROLTEC SF** is a proprietary, high-performance **sintered and forged powder metallurgy (PM) cold work tool steel** engineered to deliver exceptional wear resistance, toughness, and dimensional stability. The "SF" designation stands for "Sintered & Forged," representing a unique manufacturing process where the material is first produced via powder metallurgy to achieve a homogeneous, fine carbide structure, then subsequently hot-forged to enhance density and mechanical properties. This advanced processing results in a material with **near-isotropic behavior, outstanding grindability, and superior performance in demanding applications** compared to conventional high-alloy tool steels like D2. --- ## **1. Key Characteristics & Advantages** - **Exceptional Wear Resistance:** Superior to conventional D2 and high-vanadium steels due to an ultra-fine, uniform dispersion of hard vanadium carbides. - **High Toughness:** Offers significantly better impact and shock resistance than conventional steels at equivalent hardness levels, reducing the risk of chipping and fracture. - **Excellent Dimensional Stability:** Minimal and predictable size change during heat treatment, critical for precision tooling and complex geometries. - **Superior Grindability:** The fine carbide structure allows for efficient grinding with reduced risk of cracking or burning, even at high hardness levels. - **Near-Isotropic Properties:** The sintered and forged process ensures consistent mechanical properties in all directions, enabling predictable tool performance. - **Good Polishability:** Capable of achieving high surface finishes, suitable for precision forming and molding applications. - **Deep Hardenability:** Can be uniformly through-hardened in substantial cross-sections. --- ## **2. Typical Chemical Composition (Weight %)** | Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Tungsten (W) | | :--- | :---: | :---: | :---: | :---: | :---: | | **Content** | **2.30** | **6.50** | **2.50** | **6.50** | **-¹** | **Alloying Rationale:** - **Carbon (2.30%) & Vanadium (6.50%):** The core of ROLTEC SF's performance. Form an extremely high volume of ultra-hard vanadium carbides (VC) for maximum abrasion resistance. - **Chromium (6.50%) & Molybdenum (2.50%):** Provide secondary hardening, increase hardenability, and contribute to wear resistance and toughness. - **Advanced PM+S+F Process:** The powder metallurgy base ensures carbide homogeneity, while the subsequent forging step refines the microstructure and eliminates residual porosity, enhancing density and mechanical integrity. *¹: Some product data sheets may list a nominal tungsten content; refer to official specifications for the exact variant.* --- ## **3. Physical & Mechanical Properties** ### **Physical Properties:** - **Density:** ~7.6 - 7.7 g/cm³ - **Thermal Conductivity:** ~22 W/(m·K) at 20°C - **Modulus of Elasticity:** ~210 GPa - **Coefficient of Thermal Expansion:** ~10.2 x 10⁻⁶/K (20-400°C) ### **Heat Treatment & Mechanical Data:** - **Soft Annealed Hardness:** ~280 HBW - **Austenitizing Temperature:** 1100 - 1160°C (2010 - 2120°F) - **Quenching Medium:** Salt bath, oil, or pressurized gas. - **Tempering Range:** 500 - 550°C (930 - 1020°F). **Triple tempering is strongly recommended.** - **Achievable Hardness:** **64 - 68 HRC** - *64-66 HRC (tempered at 525-540°C):* Optimal balance of wear resistance and toughness for most applications. - *66-68 HRC (tempered at 500-520°C):* Maximum wear resistance for extreme abrasion. - **Transverse Rupture Strength:** >3500 MPa (at 65 HRC) - **Impact Toughness (Charpy C):** Typically 2-3 times higher than conventional D2 at equivalent hardness. --- ## **4. Main Applications** ROLTEC SF is designed for the most demanding cold work applications where both extreme wear and high toughness are required. - **High-Volume Precision Blanking & Punching:** Progressive dies for electrical steel laminations, high-strength automotive steels, and abrasive composites. - **Cold Forming & Extrusion:** Punches, dies, and inserts for forming hard metals and alloys. - **Powder Compaction Tools:** Critical components for pressing hard metal and ceramic powders. - **Shear Blades & Industrial Knives:** For cutting advanced composites, fiberglass, and abrasive non-metallics. - **Thread Rolling & Forming Dies:** For high-precision, long-run fastener production. - **Precision Rolls & Wear Parts:** Rolls for cold rolling abrasive strips, and wear plates in severe environments. - **Molding Inserts:** For highly abrasive plastics (e.g., heavily filled polymers, fiber-reinforced plastics). --- ## **5. Relevant International Standards & Comparable Grades** As a proprietary sintered and forged PM grade, ROLTEC SF does not have a direct standardized equivalent. Its performance positions it among the top tier of high-vanadium PM tool steels. | Category | Standard / Supplier | Comparable Grade | Key Performance Comparison | | :--- | :--- | :--- | :--- | | **PM Tool Steel** | **Uddeholm Proprietary** | **VANADIS 10** | ROLTEC SF offers similar or superior wear resistance with potentially enhanced toughness and grindability. | | **PM Tool Steel** | **Böhler Proprietary** | **K890** | Similar ultra-high wear resistance class. ROLTEC SF's S+F process may offer microstructural advantages. | | **PM Tool Steel** | **Crucible (CPM)** | **CPM 10V** | Comparable high-vanadium concept. ROLTEC SF typically offers better toughness and grindability. | | **Conventional Steel** | **AISI** | **D2** | **Not equivalent.** ROLTEC SF provides dramatically superior wear resistance (5-10x) and significantly higher toughness. | **Designation Note:** It is most accurate to specify the material as **"ROLTEC SF"** or describe it as a **"Sintered & Forged PM High-Vanadium Cold Work Tool Steel."** --- ## **6. Supply Form & Processing** - **Available Forms:** Blocks, round bars, and custom pre-machined blanks. - **Machining:** Must be machined in the soft-annealed condition. Use rigid setups and sharp carbide tools. Its abrasiveness accelerates tool wear; proper parameters are essential. - **Grinding:** **Excellent grindability for its hardness class.** Use aluminum oxide or CBN wheels with ample coolant. The fine structure reduces the risk of grinding cracks. - **EDM:** Suitable. A stress-relieving temper is required after EDM to remove the transformed surface layer. - **Heat Treatment:** Requires precise, controlled atmosphere or vacuum heat treatment. **Triple tempering is critical** to achieve full secondary hardening, transform retained austenite, and ensure dimensional stability. Cryogenic treatment is highly beneficial. - **Surface Treatment:** An excellent substrate for advanced PVD coatings (TiAlN, AlCrN) to further enhance performance. --- ## **7. Conclusion** **Böhler-Uddeholm ROLTEC SF** represents a significant technological advancement in tool steel manufacturing, combining the **carbide homogeneity of powder metallurgy with the densification and grain refinement of forging**. This unique Sintered & Forged process yields a material that breaks the traditional wear-toughness compromise, offering exceptional performance where conventional steels fail. It is the ultimate choice for applications plagued by both severe abrasive wear and high mechanical stress, where tool life extension and reliability are paramount. While representing a premium investment, ROLTEC SF delivers substantial economic return through dramatically extended service life, reduced unplanned downtime, and the ability to machine and finish with greater confidence and efficiency. For the most challenging cold work applications, it provides a definitive, high-performance solution. -:- For detailed product information, please contact sales. -: Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6886 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Bohler-Uddeholm ROLTEC SF Cold Work Tool Steel Flange -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3357 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition