JIS SK5M Water Hardening 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. -: JIS SK5M Water Hardening Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS SK5M Water Hardening Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS SK5M Water Hardening Tool Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Datasheet: JIS SK5M Water-Hardening Tool Steel (Mo-Modified)** --- #### **1. Product Overview** **JIS SK5M** is a high-carbon, molybdenum-modified tool steel classified under Japanese Industrial Standard (JIS) G 4404. As a molybdenum-enhanced variant of the standard SK5, it represents an optimized member of the water-hardening family. The deliberate addition of molybdenum (Mo) significantly improves **hardenability** and **toughness** compared to conventional SK5, while retaining the core characteristic of achieving very high surface hardness through water quenching. SK5M offers a superior balance of properties, making it suitable for more demanding applications where the plain carbon SK5 grade may exhibit excessive brittleness or insufficient through-hardening. It remains a cost-effective solution that bridges the gap between plain carbon steels and more expensive alloy grades. --- #### **2. International Standard Cross-Reference** SK5M is defined under JIS G 4404, with functional equivalents in other systems based on composition and performance. | Standard System | Equivalent / Similar Grade | Note | | :--- | :--- | :--- | | **JIS G 4404 (Japan)** | **SK5M** | Defining standard (Molybdenum-type) | | **ASTM (USA)** | W2-0.9C (Mo variant) | Similar high-carbon water-hardening with Mo | | **DIN (Germany)** | 1.2003 / C90W2 | Similar composition and quenching method | | **BS (UK)** | **BW1C** | Water-hardening grade with Mo addition | | **ISO** | ~TC90 (Modified) | Similar application scope | | **GB (China)** | **T9Mo** | Modified high-carbon tool steel with Mo | --- #### **3. Chemical Composition (Typical, weight % per JIS G 4404)** The defining feature is the controlled addition of Molybdenum within the standard high-carbon framework. | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | **Molybdenum (Mo)** | Phosphorus (P) | Sulfur (S) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content (%)** | 0.80 - 0.90 | 0.10 - 0.30 | 0.30 - 0.60 | **0.10 - 0.25** | ≤ 0.030 | ≤ 0.030 | **Role of Key Alloying Elements:** * **Carbon (0.80-0.90%):** Provides high hardness and wear resistance after heat treatment. * **Molybdenum (0.10-0.25%):** The critical modifier. It increases hardenability (deepens the hardened zone), refines grain structure for improved toughness, and allows for slightly less severe quenching practices, reducing cracking tendency. --- #### **4. Physical & Mechanical Properties** * **Density:** ~7.85 g/cm³ * **Thermal Conductivity:** Moderate. * **Machinability (Annealed State):** Fair to Good. Comparable to SK5 when in a properly spheroidized annealed condition. * **Hardenability:** **Low to Moderate (Improved over SK5).** The Mo addition provides a measurably deeper and more uniform hardened zone than plain SK5, especially in sections up to ~20mm. * **Primary Quenching Medium:** **Water or Brine.** The presence of Mo provides a wider processing window, sometimes allowing the use of agitated warm water or brine for less severe quenching. * **Typical Achievable Hardness:** * **Annealed State:** ~ 187 - 212 HB * **Hardened & Tempered State:** **61 - 64 HRC** (Can reach the upper range with optimal processing). --- #### **5. Heat Treatment Guidelines** * **Forging:** Heat uniformly to 1050-850°C. Cool slowly in furnace or insulating medium. * **Annealing:** Heat to 750-780°C, slow furnace cool to ~500°C, then air cool. Aim for a spheroidized structure. * **Hardening:** 1. **Preheat:** Mandatory at 650-700°C. 2. **Austenitizing:** **790-820°C.** The Mo addition permits a slightly higher austenitizing temperature than plain SK5 for better alloy solutioning. 3. **Quench:** Agitate in **water, brine, or a fast polymer quenchant.** The improved hardenability may allow for slightly slower agitation in some cases. * **Tempering:** **Perform immediately** after quenching. Temper at **150-200°C for 1-2 hours.** For applications requiring better toughness at the expense of some hardness, tempering at 250-300°C can be considered (resulting hardness ~55-59 HRC). --- #### **6. Product Applications** SK5M is used for applications similar to SK5 but where enhanced performance, reliability, or suitability for slightly thicker sections is required. * **Cutting Tools:** **Heavier-duty hand saw blades (for metal cutting), band saw blades for wood, industrial knives** for cutting textiles, rubber, and plastics. * **Forming & Stamping Tools:** **Punches, dies, and forming tools** for mild steel and non-ferrous metals where higher toughness than SK5 is needed. * **Hand Tools:** **High-quality cold chisels, masonry nails, screwdriver tips, and pincer jaws.** * **Agricultural & Forestry Tools:** **Chipper blades, heavier-duty pruning saws, and cultivator teeth.** * **Wear Parts:** **Guide plates, wear strips, and machine parts** subject to abrasion but requiring some resistance to chipping. * **Blades:** **Circular cutter blades for packaging and food processing.** --- #### **7. Advantages & Limitations** | Advantages | Limitations | | :--- | :--- | | • **Improved hardenability and depth of hardness** over SK5.
• **Better toughness and shock resistance** due to finer grain structure from Mo.
• **Reduced risk of quenching cracks** compared to plain SK5 for equivalent sections.
• **Cost-effective** performance upgrade from SK5 without moving to full alloy steels.
• **Maintains very high achievable hardness.** | • **Still requires water quenching** with associated distortion risks for complex shapes.
• **Not suitable for deep hardening** like oil-hardening or air-hardening steels.
• **Low hot hardness;** unsuitable for high-speed or hot work.
• **Limited dimensional stability** during heat treatment compared to oil-hardening grades. | --- #### **8. Selection Guide: SK5 vs. SK5M vs. Oil-Hardening** * **SK5 vs. SK5M:** Choose **SK5M** when you need **more consistent through-hardening, better toughness, or are heat treating slightly thicker/more complex parts.** SK5 is sufficient for very simple, thin-section tools where cost is the absolute primary driver. * **SK5M vs. Oil-Hardening (e.g., SKS93):** Choose **SK5M** if **ultimate surface hardness (>62 HRC) is critical** and part geometry is simple. Choose an **oil-hardening steel** when **minimal distortion, better dimensional control, or deeper hardening in complex shapes** is required, even if peak hardness is slightly lower (60-62 HRC). **Conclusion:** JIS SK5M is a **technologically enhanced evolution of traditional water-hardening steel.** The strategic addition of molybdenum successfully addresses key weaknesses of plain carbon grades—improving toughness, hardenability, and processing safety—while preserving their signature high hardness and low cost. It is the **recommended choice over SK5 for most professional and industrial tool applications** where water hardening is specified, providing a more reliable and higher-performance outcome with only a marginal cost increase. -:- For detailed product information, please contact sales. -: JIS SK5M Water Hardening Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6793 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. -: JIS SK5M Water Hardening Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SK5M Water Hardening Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SK5M Water Hardening Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS SK5M Water Hardening 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 3264 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