AISI Type S3 Shock Resisting 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. -: AISI Type S3 Shock Resisting Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: AISI Type S3 Shock Resisting Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AISI Type S3 Shock Resisting Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type S3 Shock-Resisting Tool Steel (UNS T41903)** ## **Overview** **AISI S3 (UNS T41903)** is a specialized **chromium-tungsten water-hardening shock-resisting tool steel**. Positioned within the S-series for impact applications, S3 is distinguished by its relatively **high tungsten content** compared to other shock steels, which provides it with **superior wear resistance and hot hardness** while still maintaining good toughness. It is designed for applications that combine **moderate impact loading with significant abrasive or high-temperature wear**, such as hot work chisels and shear blades. As a water-hardening grade, it requires careful heat treatment to balance hardness and minimize the risk of quench cracking. ## **1. Chemical Composition (Nominal %)** S3's composition is balanced for shock resistance with enhanced wear capability. | Element | Content (%) | Primary Function | |---------|------------|------------------| | **Carbon (C)** | 0.45 - 0.55 | Provides base hardness and hardenability. The mid-range carbon balances wear resistance and toughness. | | **Tungsten (W)** | 0.50 - 1.00 | **Key element.** Improves wear resistance through carbide formation and significantly increases hot hardness (red-hardness). | | **Chromium (Cr)** | 0.30 - 0.50 | Enhances hardenability, wear resistance, and provides mild oxidation resistance. | | **Silicon (Si)** | 0.15 - 0.30 | Provides some solid solution strengthening and deoxidation. | | **Manganese (Mn)** | 0.20 - 0.40 | Aids in hardenability. | | **Vanadium (V)** | ≤ 0.15 | May be present for grain refinement. | | **Iron (Fe)** | Balance | Base metal. | **Key Chemistry Note:** S3 is characterized by its **tungsten addition**, setting it apart from simpler water-hardening shock steels. The **tungsten content (0.5-1.0%)** is sufficient to form hard, stable carbides that resist abrasion and provide strength at elevated temperatures, but not so high as to severely compromise toughness or make it a high-speed steel. Its composition is simpler than S1 (which has higher Si and W) and is more focused on wear than the silicon-dominated S2 or S5. ## **2. Physical & Mechanical Properties** *Typical properties in the hardened and tempered condition (~55-58 HRC).* | Property | Typical Value / Condition | |----------|--------------------------| | **Density** | ~7.83 g/cm³ (0.283 lb/in³) | | **Melting Point** | ~1510°C (2750°F) | | **Thermal Conductivity** | ~45 W/m·K (Moderately good) | | **Coefficient of Thermal Expansion** | ~12.1 × 10⁻⁶/K (20-100°C) | | **Modulus of Elasticity** | 205 GPa (29.7 × 10⁶ psi) | | **Annealed Hardness** | 183-212 HB | | **Hardened & Tempered Hardness** | **54-58 HRC** (Common working range for optimal balance). Can be hardened to ~61-62 HRC as-quenched. | | **Tensile Strength** | ~1800-2000 MPa (261-290 ksi) at 56 HRC | | **Impact Toughness** | **Good.** Lower than silicon-rich grades like S2 or S5 at the same hardness, but still very serviceable for shock applications. | | **Wear Resistance** | **Good to Very Good.** Better than S2, S5, or S7 due to tungsten carbides. | | **Hot Hardness / Red Hardness** | **Good.** Maintains hardness and edge integrity at moderately elevated temperatures better than most other shock steels (except S1). | | **Machinability (Annealed)** | Fair to Good. | | **Hardenability** | **Shallow (Water-Hardening).** Requires vigorous quenching (water or brine) and is best suited for sections under ~25mm (1 inch) diameter for full through-hardening. | ## **3. International Standards & Cross-References** S3 is a less common but standardized grade. | Standard | Designation | Notes | |----------|------------|-------| | **UNS** | T41903 | | | **AISI/ASTM (USA)** | S3 (ASTM A681) | | | **ISO (International)** | **~55WCrV8** (ISO 4957: Tool steels) - Very close match. | | | **DIN (Germany)** | **1.2542** (Note: This is also used for S1; compositions overlap. S3 is a lower-alloy variant). | | | **BS (UK)** | No direct common equivalent. | | | **JIS (Japan)** | No direct common equivalent. | | | **GB (China)** | **5CrW2Si** (This is often listed for S1; S3 would be a lower-alloy version). | | | **Common Description** | **Tungsten-Chromium Water-Hardening Shock Steel** | | ## **4. Product Applications** S3 is used for tools that require a combination of shock resistance and better-than-average wear or hot hardness. **Primary Applications:** * **Hot Work Tools:** * **Hot chisels** and **hot cuts** for blacksmithing and forging. * **Hot shear blades** for cutting bar stock or billets at elevated temperatures. * **Cold Work Cutting & Shearing:** * **Shear blades** for metal bars, rods, and wire. * **Bolt croppers** and **rebar cutters**. * **Cold chisels** for general metalworking. * **Punching and Forming:** * **Heavy-duty punches** for sheet metal. * **Forming tools** subject to intermittent impact. * **Mining & Construction:** * **Rock drill bits** for softer formations (where abrasion is a factor). * **Clay spades** and **digging tool tips**. **Application Rationale:** S3 is selected over a plain carbon water-hardening steel (like W1) when **greater wear life or the ability to work on hot material is needed**. It is chosen over the tougher S2 or S5 when **the work is more abrasive or hotter**. It is chosen over S1 when **cost is a greater concern and the highest level of toughness is not required**. ## **5. Heat Treatment Guidelines** As a water-hardening steel, heat treatment of S3 requires care to avoid cracking. * **Annealing:** Heat to 760-790°C (1400-1450°F), slow furnace cool. Annealed hardness: 183-212 HB. * **Hardening:** 1. **Preheating:** **Critical.** Preheat slowly and thoroughly to 650-700°C (1200-1290°F). 2. **Austenitizing:** Heat to **790-820°C (1455-1510°F)**. Soak for 10-20 min per inch. 3. **Quenching:** Quench in **agitated water or brine**. For complex shapes or to reduce cracking risk, an **interrupted quench** is used: quench in brine until the part is just below 400°C (750°F) (color goes black), then immediately transfer to oil or air to cool slowly. * **Tempering:** * **Temper immediately** after quenching (within 30-60 minutes). * Temper at **205-425°C (400-800°F)** depending on desired final hardness and toughness. * A temper at **315-370°C (600-700°F)** will produce a good balance of toughness and wear resistance at ~54-56 HRC. * **Double tempering** is recommended. ## **6. Comparative Position within S-Series** | Grade | Key Feature | Best For | Relative Wear | Relative Toughness | |-------|-------------|----------|---------------|-------------------| | **S2** | High Silicon | Maximum Toughness at Moderate Hardness | Lower | **Highest** | | **S3** | Tungsten | Shock + **Wear/Hot Hardness** | **Higher** | Moderate | | **S5** | Manganese-Silicon | Heavy Shearing & Impact | Low | Very High | | **S7** | Chromium-Molybdenum | Extreme Impact, Air Hardening | Moderate | Extremely High | --- **Disclaimer:** AISI S3 is a water-hardening steel with a significant risk of distortion and quench cracking, especially in complex or uneven sections. Proper preheating and quenching technique are essential. Its use has declined in favor of more forgiving air-hardening grades like S7 for many impact applications. However, it remains a cost-effective choice for specific applications requiring its particular balance of wear and shock resistance. Always consult detailed heat treatment guidelines and consider the specific geometry of the part. -:- For detailed product information, please contact sales. -: AISI Type S3 Shock Resisting Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6758 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. -: AISI Type S3 Shock Resisting Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type S3 Shock Resisting Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type S3 Shock Resisting Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AISI Type S3 Shock Resisting 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 3229 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