AISI Type A2 Tool Steel Tube,Pipe

AISI Type A2 Tool Steel Tube Product Information -:- For detailed product information, please contact sales. -: AISI Type A2 Tool Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

AISI Type A2 Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type A2 Tool Steel** ## **Overview** AISI Type A2 is a versatile **medium-alloy, air-hardening cold work tool steel** renowned for its excellent balance of properties. It offers a superior combination of **good wear resistance, high toughness, and minimal dimensional distortion during heat treatment**, making it one of the most widely used and popular tool steels in the industry. As an air-hardening grade, it provides greater dimensional stability compared to oil-hardening steels, reducing the risk of cracking and warping. A2 is considered the workhorse of the tool steel family, suitable for a broad range of applications where reliability and consistent performance are paramount. --- ## **Chemical Composition (Typical Weight %)** The carefully balanced composition provides optimal hardenability, wear resistance, and toughness. | Element | Content (%) | | :--- | :--- | | Carbon (C) | 0.95 - 1.05 | | Chromium (Cr) | 4.75 - 5.50 | | Molybdenum (Mo) | 0.90 - 1.40 | | Manganese (Mn) | 0.40 - 1.00 | | Silicon (Si) | 0.15 - 0.50 | | Vanadium (V) | 0.15 - 0.50 | | Sulfur (S) | ≤ 0.03 | | Phosphorus (P) | ≤ 0.03 | | **Iron (Fe)** | **Balance** | **Key Role of Elements:** * **Carbon & Chromium:** Form hard chromium carbides (Cr₇C₃) for good wear resistance. Chromium provides excellent hardenability and contributes to air-hardening capability. * **Molybdenum:** Enhances hardenability, promotes fine grain structure, improves toughness, and provides secondary hardening during tempering. * **Vanadium:** Refines grain size, increases wear resistance by forming hard vanadium carbides, and improves toughness. * **Manganese & Silicon:** Act as deoxidizers and enhance hardenability. --- ## **Physical & Mechanical Properties** *Note: Properties depend on heat treatment condition (typically hardened and tempered).* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.86 g/cm³ (0.284 lb/in³) | | **Hardness (Annealed)** | 200 - 248 HB (Brinell) | | **Hardness (Hardened & Tempered)** | 57 - 62 HRC (Commonly used at 58-60 HRC) | | **Wear Resistance** | **Good to Very Good.** Superior to oil-hardening grades (O1) but less than high-carbon, high-chromium grades (D2, A11). | | **Toughness** | **Very Good.** One of its standout features, offering better impact resistance than D2 while maintaining good wear characteristics. | | **Dimensional Stability** | **Excellent.** Air hardening results in minimal distortion, warping, and size change (~0.0002 in/in) compared to oil-hardening steels. | | **Machinability (Annealed)** | **Fair to Good** (Approx. 65% of 1% carbon steel). Softer than fully hardened state but contains hard carbides that can be abrasive on tools. | | **Grindability** | **Fair.** More difficult than O1 due to higher alloy content and hardness, but better than D2. Requires proper wheel selection and technique. | | **Thermal Conductivity** | Relatively low (~24.9 W/m·K at 20°C). | | **Coefficient of Thermal Expansion** | ~10.4 × 10⁻⁶/°C (20-100°C) | --- ## **Heat Treatment Guidelines** | Process | Parameters | | :--- | :--- | | **Annealing** | Heat to 845-870°C (1550-1600°F), slow furnace cool at ≤22°C/hour (40°F/hour) to 480°C (900°F), then air cool. Result: 200-248 HB. | | **Stress Relieving** | 650-675°C (1200-1250°F) for 1-2 hours, air cool. | | **Preheating** | **Critical:** Preheat at 650-760°C (1200-1400°F) to minimize thermal shock. | | **Austenitizing** | 925-980°C (1700-1800°F). Higher temperatures increase hardness but reduce toughness. 955-970°C (1750-1775°F) is typical. | | **Quenching** | **Quench in still or forced air.** Sections over 100mm may require forced air or positive pressure quenching. | | **Tempering** | **Mandatory immediately after quenching.** Temper at 175-540°C (350-1000°F) for minimum 2 hours per cycle (double temper recommended). Peak hardness (60-62 HRC) achieved at 175-205°C (350-400°F). | --- ## **Product Applications** AISI A2's balanced properties make it suitable for a vast range of industrial applications: ### **Primary Applications:** 1. **Blankng and Forming Dies:** For sheet metal, especially in medium to long production runs. 2. **Shear Blades and Slitter Knives:** For cutting paper, cardboard, plastics, and light-gauge metals. 3. **Punches, Trim Dies, and Piercing Tools:** Where good toughness is needed to prevent chipping. 4. **Thread Rolling Dies and Gear Cutters:** For producing precision threads and gears. 5. **Molds and Die Casting Dies:** For plastic injection molds and low-temperature aluminum die casting. 6. **Gauges, Jigs, and Fixtures:** Where dimensional stability is critical. 7. **Machine Tool Components:** Wear plates, guide rails, and cam plates. ### **Industry Usage:** - **Metal Stamping & Forming** - **Plastic Injection Molding** - **Cutting Tool Manufacturing** - **Precision Machining & Tooling** - **Automotive Component Production** --- ## **International Standards & Cross-Reference** AISI A2 has direct equivalents in major international standards. | Standard | Designation | Equivalent / Similar Grade | | :--- | :--- | :--- | | **AISI/SAE (USA)** | **Type A2** | - | | **UNS (USA)** | **T30102** | - | | **ASTM (USA)** | A681 | Grade A2 | | **Europe (EN)** | **1.2363** | X100CrMoV5-1 | | **Germany (DIN)** | **1.2363** | X100CrMoV5-1 | | **Japan (JIS)** | **SKD12** | - | | **Sweden (SS)** | **2260** | - | | **ISO** | **~100MnCrW4** | - | --- ## **Advantages & Considerations** ### **Advantages:** 1. **Excellent Toughness-Wear Balance:** Superior to D2 in toughness while maintaining good wear resistance. 2. **Minimal Distortion:** Air hardening provides excellent dimensional stability. 3. **Good Hardenability:** Through-hardens reliably in sections up to 4-6 inches (100-150mm). 4. **Versatility:** Suitable for a wide range of cold work applications. 5. **Predictable Performance:** Well-understood heat treatment response and properties. ### **Considerations:** 1. **Lower Wear Resistance than D2:** Not optimal for highly abrasive applications. 2. **Limited High-Temperature Performance:** Not suitable for hot work applications (above 400°C/750°F). 3. **Requires Proper Heat Treatment:** Must follow specific preheating and tempering procedures. 4. **Grinding Challenges:** Requires careful grinding techniques to avoid cracking. --- ## **Technical Comparison** - **vs. O1 (Oil-Hardening):** A2 offers better dimensional stability, deeper hardenability, and slightly better wear resistance. - **vs. D2 (High-Carbon, High-Chromium):** A2 has better toughness and less grinding difficulty, but lower wear resistance. - **vs. A10 (Graphitic):** A2 has better wear resistance but lacks the anti-galling properties of A10. --- ## **Availability Forms** - Round Bars (¼" to 12"+ diameter) - Flat Bars - Plates - Forged Blocks - Custom Shapes and Precision Ground Stock ## **Surface Finishes** - Hot Rolled (HR) - Rough Turned (RT) - Precision Ground (PG) - Polished --- **Conclusion:** AISI Type A2 tool steel represents the optimal balance in the cold work tool steel family. Its exceptional combination of wear resistance, toughness, and dimensional stability has established it as an industry standard for countless tooling applications. When neither extreme wear resistance (D2) nor maximum toughness (S7) is required, A2 provides the most reliable and cost-effective solution for demanding tooling applications requiring consistent performance and long service life. Its predictable behavior during heat treatment and machining makes it a preferred choice for toolmakers worldwide. -:- For detailed product information, please contact sales. -: AISI Type A2 Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6659 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 A2 Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type A2 Tool Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type A2 Tool Steel Tube -:- For detailed product information, please contact sales. -:

Packing of AISI Type A2 Tool Steel Tube -:- 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 Tube 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 3130 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