Assab Steel Capillarys,ASSAB XW-41 Cold Work Steel Capillary

Assab Steel Capillarys ASSAB XW-41 Cold Work Steel Capillary Product Information -:- For detailed product information, please contact sales. -: Assab Steel Capillarys ASSAB XW-41 Cold Work Steel Capillary Synonyms -:- For detailed product information, please contact sales. -:

Assab Steels ASSAB XW-41 Cold Work Steel Product Information -:- For detailed product information, please contact sales. -: # Technical Datasheet: ASSAB XW-41 (AISI D2 Type) Cold Work Steel --- ## **1. Product Overview** **ASSAB XW-41** is a premium **high-carbon, high-chromium, air-hardening cold work tool steel** developed by the ASSAB Group (Uddeholm). It represents the ASSAB proprietary equivalent of the globally recognized **AISI D2 grade**, but is distinguished by superior manufacturing quality and consistency. This steel is engineered for applications demanding **exceptional wear resistance and high compressive strength**, offering the best balance of wear properties among conventional cold work steels. Characterized by a **high volume of hard, primary chromium carbides (M₇C₃ type)**, XW-41 provides outstanding resistance to abrasive wear, making it ideal for long-run production tooling. While it air-hardens with minimal distortion, its high carbide content and carbon level result in lower toughness compared to more balanced grades like A2. It is the material of choice when wear is the primary failure mechanism and operating conditions are predictable. --- ## **2. Key International Standards & Designations** | Country/System | Standard Designation | Equivalent Grade Name | | :--- | :--- | :--- | | **Sweden / ASSAB** | **ASSAB XW-41** | Proprietary Brand Name | | **USA (AISI/SAE)** | **AISI D2** | UNS T30402 | | **ISO** | **ISO 4957:2018** | **1.2379** / X153CrMoV12 | | **Europe (EN)** | **EN ISO 4957:2018** | **1.2379** / X153CrMoV12-1 | | **Germany (DIN/W-Nr.)** | **1.2379** | X155CrVMo12-1 | | **Japan (JIS)** | **JIS G4404** | **SKD11** | | **United Kingdom (BS)** | **BD2** | - | | **China (GB)** | **GB/T 1299-2014** | **Cr12Mo1V1** | --- ## **3. Chemical Composition (Typical %)** The composition is optimized to form a high volume of hard carbides while maintaining adequate hardenability for air quenching. | Element | Weight % (Typical) | Metallurgical Function | | :--- | :--- | :--- | | **Carbon (C)** | 1.55 | Primary hardening element; ensures high matrix hardness and combines with Cr to form a large volume of wear-resistant carbides. | | **Chromium (Cr)** | 12.00 | Forms the primary **M₇C₃ carbides** responsible for extreme wear resistance. Provides deep hardenability and moderate corrosion resistance. | | **Molybdenum (Mo)** | 0.80 | Enhances hardenability, refines grain structure, improves toughness, and contributes to secondary hardening during tempering. | | **Vanadium (V)** | 1.00 | Forms very hard, fine **MC-type vanadium carbides** for additional wear resistance and grain refinement. Key for controlling grain growth. | | **Silicon (Si)** | 0.30 | Deoxidizer and solid solution strengthener. | | **Manganese (Mn)** | 0.40 | Aids hardenability. | | **Other (P, S)** | < 0.025 | Impurities kept at very low levels. | **Key Microstructural Feature:** Contains approximately **12-16% by volume of primary alloy carbides**, predominantly chromium-rich M₇C₃. This high carbide volume grants XW-41 its superior abrasion resistance but also contributes to its relatively low toughness and challenging machinability. --- ## **4. Physical & Mechanical Properties** ### **4.1 Standard Heat Treatment** * **Annealing:** Heat to 850-880°C (1565-1615°F), slow furnace cool (~10°C/hr) to 600°C (1110°F), then air cool. Annealed hardness: **~210-240 HB**. * **Stress Relieving (after rough machining):** 600-650°C (1110-1200°F). * **Austenitizing (Hardening):** **1020-1040°C (1870-1905°F)**. Precise temperature control is critical. Use protective atmosphere. Soak time: 20-40 min/inch. * **Quenching:** **Still or forced air** to below 50°C (120°F). Excellent dimensional stability. * **Tempering:** **Must temper immediately.** **Double or triple tempering is mandatory** to transform retained austenite and ensure stability. * **For Max Wear Resistance:** Temper at 180-250°C (355-480°F), achieving **60-62 HRC**. * **For General Purpose:** Temper at 450-520°C (840-970°F), achieving **56-59 HRC** (better toughness). ### **4.2 Typical Mechanical Properties (Hardened & Double Tempered @ 500°C)** | Property | Value / Rating | Notes | | :--- | :--- | :--- | | **Hardness** | **57 - 60 HRC** (common working range) | Can be tempered from 54 to 62+ HRC. | | **Compressive Strength** | ~ 2600 - 3000 MPa | Extremely high, excellent for forming. | | **Ultimate Tensile Strength** | ~ 1800 - 2100 MPa | | | **Yield Strength (0.2% Offset)** | ~ 1600 - 1900 MPa | | | **Impact Toughness (Charpy)** | **Relatively Low (10-25 J)** | The trade-off for high wear resistance. Not suitable for severe impact. | | **Abrasive Wear Resistance** | **Outstanding** | Among the best of conventional cold work steels. | | **Dimensional Stability** | **Excellent** | Air quenching minimizes distortion and stress. | | **Deep Hardenability** | **Excellent** | Fully air hardens in large sections (up to 300-400mm). | ### **4.3 Physical Properties (Approximate)** * Density: 7.70 g/cm³ * Thermal Conductivity: ~20 W/m·K (relatively low) * Coefficient of Thermal Expansion: 10.4 x 10⁻⁶/K (20-100°C) * Modulus of Elasticity: 210 GPa (30.5 x 10⁶ psi) --- ## **5. Typical Product Applications** ASSAB XW-41 is specified for demanding, high-wear applications where tool longevity under abrasive conditions is the primary goal. * **Long-Run Blanking and Punching Dies:** Especially for abrasive materials (e.g., **pre-coated steels, fiberglass, composites, paper, plastics**). * **Cold Forming Rolls, Knurling Tools, and Thread Rolling Dies.** * **Shear Blades, Slitter Knives, and Rotary Cutters** for metals and other materials. * **Powder Compaction Dies** and precision gauges. * **Precision Plastic Injection Molds** for abrasive filled plastics (glass-filled, mineral-filled). * **Wear Parts** in machinery, such as guides, liners, and rollers subjected to severe abrasion. --- ## **6. Processing & Manufacturing Guidelines** * **Machinability (Annealed ~225 HB):** **Poor.** Rated approximately **30-35%** of 1% carbon steel due to the hard carbides. Requires rigid setups, sharp carbide tooling, and moderate speeds/feeds. * **Grindability:** **Fair to Poor.** The hard carbides are abrasive. Use softer-grade aluminum oxide or silicon carbide wheels with light passes and ample coolant to avoid burns. Diamond dressing is recommended. * **EDM Machining:** Commonly used. A **low-temperature stress relief (150-200°C) after EDM is critical** to remove the brittle, cracked "white layer" from critical surfaces. * **Polishability:** **Very Good to Excellent** (for a high-carbide steel). ASSAB's superior micro-cleanliness (often via ESR process) results in fewer pulled-out carbides and a better polish. * **Surface Treatments:** Responds exceptionally well to nitriding, TiN, TiCN, and AlCrN coatings, which can dramatically enhance surface hardness and anti-galling properties. --- ## **7. Comparative Performance & Selection Notes** * **vs. ASSAB XW-5 (A2):** XW-41 offers far superior wear resistance but has **significantly lower toughness**. Choose XW-5 for applications involving shock, complex shapes, or uneven loading. Choose XW-41 when wear is the dominant failure mode. * **vs. ASSAB XW-10 (O1):** XW-41 is in a different league regarding wear resistance and dimensional stability. XW-10 is for simpler, low-distortion tools where ease of machining is key. * **vs. ASSAB CALMAX (S7 type):** CALMAX offers vastly superior toughness and shock resistance but much lower wear resistance. They serve completely different purposes. * **vs. Powder Metallurgy (PM) Steels (e.g., ASSAB VANADIS 4 Extra):** PM steels offer a finer, more uniform carbide distribution, providing even better wear resistance combined with improved toughness. XW-41 is the best conventional alternative before stepping up to premium PM grades. * **ASSAB Quality Advantage:** Like all ASSAB grades, XW-41 benefits from stringent quality control, superior **homogeneity, and micro-cleanliness**, leading to more predictable heat treatment, better polishability, and consistent performance. --- ## **8. Important Design & Handling Notes** 1. **Toughness Limitation:** **Design for wear, not impact.** Avoid sharp internal corners, thin projections, and severe section changes. Use **generous fillet radii (minimum R3mm)**. 2. **Heat Treatment Precision:** Austenitizing temperature is critical. Too low results in low hardness and retained carbides; too high causes excessive retained austenite and grain growth. **Double/Triple tempering is non-negotiable.** 3. **Corrosion Resistance:** The 12% Cr provides **good resistance to oxidation and mild corrosion** (semi-stainless), but it is not a true stainless steel. For corrosive environments, consider ASSAB STAVAX (420) or POLMAX (420 mod). 4. **Temperature Limit:** Useful hardness is maintained up to **~400-450°C (750-840°F)**. Not for hot work applications. --- ## **9. Conclusion** **ASSAB XW-41 (AISI D2) is the industry benchmark for high-wear cold work tooling.** It delivers **unsurpassed abrasion resistance among conventional alloy tool steels**, making it the definitive choice for long-production-run dies, forming tools, and cutting blades where wear is the life-limiting factor. The **superior manufacturing quality of the ASSAB brand** ensures that XW-41 performs at the upper limit of the D2 specification, with benefits in polishability, consistency, and ultimate tool life. While its **lower toughness necessitates careful, robust tool design**, this is an acceptable trade-off for the exceptional wear performance it provides. For tool engineers facing severe abrasive conditions, requiring maximum time between regrinds, and working with predictable, non-shock loads, **ASSAB XW-41 remains the premier, proven, and most widely trusted high-wear cold work steel solution.** --- -:- For detailed product information, please contact sales. -: Assab Steels ASSAB XW-41 Cold Work Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5222 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. -: Assab Steels ASSAB XW-41 Cold Work Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Assab Steel Capillarys ASSAB XW-41 Cold Work Steel Capillary -:- For detailed product information, please contact sales. -: Chemical Identifiers Assab Steel Capillarys ASSAB XW-41 Cold Work Steel Capillary -:- For detailed product information, please contact sales. -:

Packing of Assab Steel Capillarys ASSAB XW-41 Cold Work Steel Capillary -:- 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 Capillary 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 1693 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