AISI Type M52 Intermediate High Speed Tool Steel Wire (UNS T11352)

AISI Type M52 Intermediate High Speed Tool Steel Wire (UNS T11352) Product Information -:- For detailed product information, please contact sales. -: AISI Type M52 Intermediate High Speed Tool Steel Wire (UNS T11352) Synonyms -:- For detailed product information, please contact sales. -:

AISI Type M52 Intermediate High Speed Tool Steel (UNS T11352) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type M52 Intermediate High-Speed Tool Steel (UNS T11352)** ## **Overview** **AISI M52 (UNS T11352)** is a **cobalt-free, molybdenum-vanadium high-speed steel** specifically designed as a **cost-effective performance bridge** between standard HSS grades (like M2) and premium cobalt-bearing grades (like M42). Classified as an **"Intermediate" or "Semi-High-Speed Steel"**, it delivers **significantly better hot hardness and wear resistance than M2** at a moderate price premium, making it an optimal choice for applications that demand more than standard HSS can offer, but where the full expense of cobalt grades is not justified. M52 achieves its enhanced performance through a **balanced increase in carbon, tungsten, molybdenum, and vanadium** compared to M2, without the strategic alloying element cobalt. This formulation provides a robust combination of good toughness, high attainable hardness, and improved red-hardness. ## **1. Chemical Composition (Nominal %)** | Element | Content (%) | Primary Function | |---------|------------|------------------| | **Carbon (C)** | 0.85 - 0.95 | Higher than M2 for increased matrix hardness and carbide volume. | | **Tungsten (W)** | 0.75 - 1.25 | Contributes to hot hardness and secondary hardening. | | **Molybdenum (Mo)** | 4.00 - 4.50 | Primary hardening element; enhances hardenability and hot strength. | | **Chromium (Cr)** | 3.50 - 4.30 | Improves hardenability, wear, and oxidation resistance. | | **Vanadium (V)** | 1.65 - 2.00 | **Higher than M2.** Forms hard vanadium carbides for improved abrasion resistance. | | **Cobalt (Co)** | **Not Present** | Absence keeps cost down while relying on other elements for performance. | | **Silicon (Si)** | 0.15 - 0.40 | Deoxidizer. | | **Manganese (Mn)** | 0.15 - 0.40 | Improves hardenability. | | **Sulfur (S)** | ≤ 0.03 | Typically low. | | **Phosphorus (P)** | ≤ 0.03 | Impurity kept low. | | **Iron (Fe)** | Balance | Base metal. | **Key Chemistry Note:** M52's formula is a strategic enhancement of the classic M2 (6-5-2) type. The **increased carbon and vanadium** directly boost wear resistance and achievable hardness. The **molybdenum content is high** relative to tungsten, providing strong hardenability and secondary hardening response typical of the "M" series, resulting in good performance at a lower overall alloy cost than equivalent tungsten-based grades. ## **2. Physical & Mechanical Properties** | Property | Typical Value / Condition | |----------|--------------------------| | **Density** | ~8.0 g/cm³ (0.289 lb/in³) | | **Melting Point** | ~1425°C (2600°F) | | **Thermal Conductivity** | ~28.0 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 11.2 × 10⁻⁶/K (20-540°C) | | **Modulus of Elasticity** | ~210 GPa (30.5 × 10⁶ psi) | | **Annealed Hardness** | 223-255 HB | | **Hardened & Tempered Hardness** | **63-66 HRC** (Commonly optimized at 64-65 HRC). | | **Red Hardness** | **Very Good.** Superior to M2; maintains hardness effectively up to **~560°C (1040°F)**. | | **Abrasion Resistance** | **Very Good,** significantly better than M2 due to higher vanadium carbide content. | | **Toughness** | **Good.** Better than high-cobalt/high-carbon grades (M42, M48) and comparable to or slightly lower than M2. | | **Tempering Temperature** | 540-600°C (1000-1110°F), typically double-tempered. | | **Grindability** | **Fair.** More difficult than M2 (~60% relative) due to higher vanadium content, but better than high-vanadium grades like M4. | ## **3. International Standards & Cross-References** M52 is a standardized grade recognized in major systems. | Standard | Designation | |----------|------------| | **UNS** | T11352 | | **AISI/ASTM (USA)** | M52 (ASTM A600) | | **ISO (International)** | **HS 2-9-2** (ISO 4957: Tool steels) – This is a **direct equivalent**. | | **DIN (Germany)** | **1.3249** | | **JIS (Japan)** | **SKH55** (Note: SKH55 can be similar but may have minor variations; it is the closest standard equivalent). | | **GB (China)** | **W2Mo9Cr4V2** (Approximate equivalent) | | **AFNOR (France)** | **HS 2-9-2** | ## **4. Product Applications** M52 is an excellent **general-purpose upgrade** for tools that require longer life, higher cutting speeds, or the ability to handle more abrasive materials than possible with M2. **Primary Applications Include:** * **Cutting Tools:** * **High-performance drills, taps, and end mills** for machining alloy steels, stainless steels, and tougher cast irons. * **Milling cutters and gear hobs** for general manufacturing where increased productivity is sought. * **Form tools, broaches, and reamers** requiring better wear resistance than M2 can provide. * **Saw blades and woodworking tools** for industrial cutting. * **Forming and Wear Parts:** * **Cold work punches, dies, and forming rolls** for moderate to severe service. * **Shear blades and slitter knives.** * **Wear plates and guides** in machinery. **Key Advantage:** **Optimal price-to-performance ratio.** M52 fills a critical market niche by offering a **20-40% performance improvement over M2** in terms of tool life and cutting speed capability, at a **significantly lower cost than cobalt grades like M35 or M42**. It is the ideal choice when moving beyond M2 but before justifying the investment in premium super HSS. ## **5. Processing & Heat Treatment Guidelines** * **Forging:** Heat uniformly to **1050-1100°C (1920-2010°F)**. Do not forge below **925°C (1700°F)**. Cool slowly. * **Annealing:** Heat to **840-870°C (1545-1600°F)**, hold, then furnace cool slowly to **540°C (1000°F)**. Annealed hardness: 223-255 HB. * **Hardening (Austenitizing):** 1. **Preheat Thoroughly:** 800-850°C (1470-1560°F). 2. **Austenitize:** **1200-1220°C (2190-2225°F)**. Accurate temperature control is important. 3. **Quench:** In salt bath, oil, or vacuum/pressurized gas. * **Tempering:** **Temper immediately** after quenching. Temper at **540-590°C (1000-1095°F)** for at least 2 hours per cycle. **Double tempering is standard.** The secondary hardening peak is typically reached after the first temper, with slight softening and increased toughness after the second. * **Stress Relieving:** Recommended after rough machining at 600-650°C (1110-1200°F). ## **6. Comparative Summary** | Grade | Typical Hardness (HRC) | Red-Hardness | Abrasion Resistance | Toughness | Relative Cost | |-------|------------------------|--------------|---------------------|-----------|---------------| | **M2** | 62-64 | Good | Good | Very Good | Baseline | | **M52** | **64-66** | **Very Good** | **Very Good** | Good | Moderate Premium | | **M35 (Co5%)** | 64-66 | Excellent | Very Good | Good | Higher | | **M42 (Co8%)** | 66-68 | Outstanding | Excellent | Fair | High | **Conclusion:** AISI M52 is a strategically formulated, cost-effective high-speed steel that provides a **substantial and practical performance upgrade** for a wide range of cutting and wear applications. Its balanced properties and established international standards make it a reliable and valuable engineering material for enhancing productivity and tool life. --- **Disclaimer:** This information is for reference purposes. Specific processing parameters and application suitability must be verified with the material supplier's technical data sheets and qualified engineering judgment. -:- For detailed product information, please contact sales. -: AISI Type M52 Intermediate High Speed Tool Steel (UNS T11352) Specification Dimensions Size： Diameter 20-1000 mm Length <6736 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 M52 Intermediate High Speed Tool Steel (UNS T11352) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type M52 Intermediate High Speed Tool Steel Wire (UNS T11352) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type M52 Intermediate High Speed Tool Steel Wire (UNS T11352) -:- For detailed product information, please contact sales. -:

Packing of AISI Type M52 Intermediate High Speed Tool Steel Wire (UNS T11352) -:- 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 Wire 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 3207 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