AISI Type W1 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 W1 Tool Steel Flange, water quenched at 775°C (1425°F), tempered 350°C (660°F) Product Information -:- For detailed product information, please contact sales. -: AISI Type W1 Tool Steel Flange, water quenched at 775°C (1425°F), tempered 350°C (660°F) Synonyms -:- For detailed product information, please contact sales. -:

AISI Type W1 Tool Steel, water quenched at 775°C (1425°F), tempered 350°C (660°F) Product Information -:- For detailed product information, please contact sales. -: # Technical Datasheet: AISI W1 Tool Steel ## Heat Treatment Specification: Water Quenched from 775°C (1425°F) & Tempered at 350°C (660°F) --- ### **1. Product Overview** **AISI W1** is a **simple high-carbon, water-hardening tool steel** representing the most fundamental and economical grade in the tool steel family. When heat treated through the specific regimen of **austenitizing at 775°C (1425°F), water quenching, and tempering at 350°C (660°F)**, it achieves a balanced combination of **good hardness, moderate toughness, and excellent surface finish capability**. This treatment profile is considered a standard, reliable practice for general-purpose tooling, leveraging W1's shallow hardenability and ability to develop a hard case with a softer, tougher core. The water quench provides rapid cooling necessary for full hardening in thin sections, while the 350°C temper relieves quenching stresses and provides a practical balance between hardness and fracture resistance. W1 is characterized by its simple composition, ease of heat treatment, and excellent machinability in the annealed state. --- ### **2. Key International Standards & Designations** | Country/System | Standard Designation | Equivalent/Specification | | :--- | :--- | :--- | | **USA (AISI/SAE)** | **AISI Type W1** | Carbon Tool Steel (C1080-C1095 range) | | **USA (ASTM)** | **ASTM A686** | Standard Specification for Carbon Tool Steel | | **ISO** | **ISO 4957:2018** | **1.1545** / C105W (W-Nr. 1.1545) - Water Hardening | | **Europe (EN)** | **EN ISO 4957:2018** | **1.1545** / C80U (France) | | **Germany (DIN/W-Nr.)** | **1.1545** | C80W2 | | **Japan (JIS)** | **JIS G4401** | **SK105 / SK95** | | **United Kingdom (BS)** | **BW1** | - | | **China (GB)** | **GB/T 1298** | **T10A / T12A** (depending on carbon content) | *Note: Exact designation depends on carbon content. The term "W1" typically covers a range from approximately 0.70% to 1.30% C.* --- ### **3. Chemical Composition (Typical Range for This Application)** For the specified heat treatment (775°C austenitize), a **medium-carbon grade within the W1 range** is typically selected to balance hardenability and toughness. A common specification is: | Element | Weight % (Typical for this HT) | Metallurgical Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.85 - 0.95 | Primary hardening element. Determines maximum attainable hardness and wear resistance. | | **Manganese (Mn)** | 0.20 - 0.40 | Mildly increases hardenability and strength. Kept low to maintain a shallow hardenability depth. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer, provides some solid solution strengthening. | | **Phosphorus (P)** | ≤ 0.025 | Impurity (controlled to prevent embrittlement). | | **Sulfur (S)** | ≤ 0.025 | Impurity (may be slightly elevated for improved machinability). | | **Other Alloys** | Trace only | Deliberately minimal to preserve shallow hardenability and low cost. | **Key Metallurgical Characteristic:** W1 is a **plain carbon steel**. Its hardening relies almost entirely on carbon content and rapid cooling (water quench). It has **very shallow hardenability**, meaning only thin sections will harden through, creating a desirable **hard case (martensite) over a tough, pearlitic core**. --- ### **4. Physical & Mechanical Properties (After 775°C Water Quench + 350°C Temper)** #### **4.1 Standard Heat Treatment Cycle** * **Preheating:** Optional but recommended at 550-650°C (1020-1200°F) for complex shapes to reduce thermal shock. * **Austenitizing:** **775°C (1425°F)** – Soak time: 10-20 minutes per inch. This is a **relatively low austenitizing temperature** chosen to produce a fine-grained austenite, which transforms to fine martensite for better toughness. * **Quenching:** **Rapid brine or water quench.** Agitation is **critical** to prevent vapor jacket formation which causes soft spots. Quench until completely cold (~50°C). * **Tempering:** **350°C (660°F)** for 1-2 hours. Single temper is often sufficient for simple shapes. This temperature provides a good balance. * **Expected Surface Hardness (thin section):** **56-58 HRC**. * **Expected Core Hardness:** Significantly lower (~25-40 HRC), depending on section size. #### **4.2 Final Mechanical Properties (Typical - Surface of fully hardened section)** | Property | Value / Rating | Notes | | :--- | :--- | :--- | | **Hardness** | **56 - 58 HRC** | Target hardness for general-purpose tools. Provides good wear resistance. | | **Ultimate Tensile Strength** | ~ 1900 - 2100 MPa | | | **Yield Strength** | ~ 1650 - 1850 MPa | | | **Compressive Strength** | ~ 2200 - 2500 MPa | Good for compressive loads. | | **Modulus of Elasticity** | ~ 200 - 205 GPa | | | **Impact Toughness (Charpy)** | **Fair (15-25 J)** | Moderate for its hardness level. The tough core helps absorb shock in appropriately designed tools. | | **Wear Resistance (Abrasive)** | **Good** | Adequate for many applications but inferior to alloy steels with hard carbides. | | **Wear Resistance (Adhesive)** | **Fair** | Can be prone to galling. | | **Dimensional Stability** | **Poor** | Water quenching induces high internal stresses and significant distortion/warping. Not suitable for precision tools without grinding after heat treatment. | | **Hardenability (Ideal Diameter, Dᵢ)** | **Very Low (~6-8mm in water)** | Only thin sections (<~10mm or 0.4") will through-harden. | #### **4.3 Physical Properties (Approx.)** * Density: 7.85 g/cm³ * Thermal Conductivity: ~50 W/m·K (good) * Thermal Expansion Coefficient: 11.5 x 10⁻⁶/K * **Key Constraint:** Very high risk of **quench cracking** due to severe thermal stresses from water quenching. Design must avoid sharp corners and sudden section changes. --- ### **5. Typical Product Applications** This W1 condition is ideal for **low-cost, general-purpose tools** where extreme wear resistance or dimensional precision is not required, and where the tool can be designed to benefit from a hard surface/tough core. * **Hand Tools:** Chisels, punches, center punches, cold chisels, screwdriver blades. * **Woodworking Tools:** Plane irons, chisels, carving tools, drill bits for wood. * **Metal Cutting Tools (Low-Speed):** Lathe tools, broaches, and form tools for soft metals (aluminum, brass). * **Simple Dies and Molds:** For sheet metal forming, bending, or cutting in low-volume applications. * **Agricultural Tools:** Cultivator shovels, knife blades. * **Measuring Tools (non-precision):** Caliper jaws, simple gauges. --- ### **6. Processing & Machining Guidelines** * **Annealed Condition:** Supplied at ~180-200 HB. **Excellent machinability.** * **Machinability:** **Excellent (80-90% of 1% C steel).** One of its primary advantages. Easily machined with HSS or carbide tools. * **Grindability:** **Excellent.** Grinds easily without burning, producing a fine finish. Ideal for tools that are ground to shape after heat treatment. * **Heat Treatment Simplicity:** Can be heat treated with simple equipment (forge, torch, furnace), but control is needed to avoid cracking. --- ### **7. Comparative Performance & Selection Notes** * **vs. O1 Oil-Hardening Steel:** O1 is easier to heat treat (less distortion/cracking), has better hardenability for slightly thicker sections, and better dimensional stability. W1 is cheaper and can achieve a slightly harder surface. * **vs. A2 Air-Hardening Steel:** A2 offers vastly superior dimensional stability, deeper hardenability, and better wear resistance, but at much higher cost and with poorer machinability. * **vs. High-Speed Steels (M2, etc.):** HSS grades offer far superior hot hardness and wear resistance for cutting applications. W1 is for room-temperature or low-speed use only. * **Why This Specific Heat Treat (775°C + 350°C)?** This is a **classic, conservative heat treatment** for general-purpose W1 tools. The **low austenitizing temperature (775°C)** minimizes grain growth and distortion. The **350°C temper** provides a good safety margin against brittleness while retaining useful hardness. It's a "tried-and-true" formula for reliable, durable tools. --- ### **8. Important Design & Handling Notes** * **Quench Cracking:** The **single greatest risk.** Tools **must** have smooth contours, generous fillet radii (min. 3mm), and avoid holes or sharp notches near edges. Preheating is highly recommended. * **Section Size Limitation:** **Not suitable for thick sections.** Maximum effective hardened depth is typically **3-6mm (0.125-0.25 inches)** from the quenched surface. * **Temperature Limitation:** Loses hardness rapidly above **200°C (390°F)**. **Not for hot work or high-speed cutting.** * **Corrosion Resistance:** **Very poor.** Will rust quickly unless protected with oil, paint, or plating. --- ### **9. Conclusion** **AISI W1 tool steel, water quenched from 775°C and tempered at 350°C, is the quintessential, economical choice for manufacturing a wide range of simple, durable hand tools and low-stress industrial tools.** Its success relies on understanding and designing for its core characteristics: **excellent machinability, shallow hardenability, high risk of quench cracking, and poor dimensional stability during heat treatment.** For applications where **low cost, ease of fabrication, and the ability to resharpen easily are paramount**, and where the operating conditions are mild (low speed, ambient temperature, no corrosion), W1 in this condition remains a viable and time-tested material. However, for any application requiring precision, complex geometry, or higher performance, oil-hardening (O1) or air-hardening (A2) steels are strongly recommended as more reliable and forgiving alternatives. -:- For detailed product information, please contact sales. -: AISI Type W1 Tool Steel, water quenched at 775°C (1425°F), tempered 350°C (660°F) Specification Dimensions Size： Diameter 20-1000 mm Length <5215 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 W1 Tool Steel, water quenched at 775°C (1425°F), tempered 350°C (660°F) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type W1 Tool Steel Flange, water quenched at 775°C (1425°F), tempered 350°C (660°F) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type W1 Tool Steel Flange, water quenched at 775°C (1425°F), tempered 350°C (660°F) -:- For detailed product information, please contact sales. -:

Packing of AISI Type W1 Tool Steel Flange, water quenched at 775°C (1425°F), tempered 350°C (660°F) -:- 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 1686 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