AISI Type A6 Tool Steel Wire

AISI Type A6 Tool Steel Wire Product Information -:- For detailed product information, please contact sales. -: AISI Type A6 Tool Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

AISI Type A6 Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type A6 Tool Steel** ## **Overview** AISI Type A6 is a **medium-carbon, high-manganese, air-hardening cold work tool steel** renowned for its **exceptional dimensional stability and superior toughness**. Characterized by lower carbon content than most A-series grades and significant manganese alloying, A6 provides an optimal balance of properties for applications where **minimal distortion during heat treatment and resistance to shock loading** are critical requirements. Its composition prioritizes dimensional predictability and impact resistance over maximum wear resistance, making it a preferred choice for precision tooling, master gauges, and complex fixtures. --- ## **Chemical Composition (Typical Weight %)** The composition features moderate carbon with high manganese for stability and hardenability. | Element | Content (%) | | :--- | :--- | | Carbon (C) | 0.65 - 0.75 | | Manganese (Mn) | 1.80 - 2.50 | | Chromium (Cr) | 0.90 - 1.20 | | Molybdenum (Mo) | 0.90 - 1.40 | | Silicon (Si) | 0.15 - 0.50 | | Nickel (Ni) | 0.90 - 1.40 | | Vanadium (V) | ≤ 0.25 | | Sulfur (S) | ≤ 0.03 | | Phosphorus (P) | ≤ 0.03 | | **Iron (Fe)** | **Balance** | **Key Role of Elements:** * **Moderate Carbon (0.65-0.75%):** Lower than most tool steels, optimizing toughness while providing adequate hardness. Reduces distortion and cracking tendency during heat treatment. * **High Manganese (1.80-2.50%):** Primary alloying element providing deep hardenability, austenite stabilization, and significant contribution to toughness and strength. * **Nickel (0.90-1.40%):** Enhances toughness, hardenability, and ductility, particularly in heavier cross-sections. * **Chromium & Molybdenum:** Support hardenability, provide moderate wear resistance through carbide formation, and contribute to air-hardening capability. * **Low Vanadium:** Minimizes hard carbide formation to preserve toughness; primarily refines grain structure. --- ## **Physical & Mechanical Properties** *Properties shown are for properly heat treated material (typically austenitized at 830-870°C/1525-1600°F).* | Property | Typical Value / Description | | :--- | :--- | | **Density** | 7.86 g/cm³ (0.284 lb/in³) | | **Hardness (Annealed)** | 200 - 235 HB (Brinell) | | **Hardness (Hardened & Tempered)** | **54 - 60 HRC** (Commonly used at 56-58 HRC for optimal toughness) | | **Wear Resistance** | **Fair to Moderate.** Lower than higher-carbon tool steels (A2, D2) but adequate for many applications where wear is not the primary concern. | | **Toughness** | **Excellent.** One of the toughest air-hardening tool steels, superior to A2 and comparable to some shock-resistant grades at equivalent hardness. | | **Dimensional Stability** | **Exceptional.** Minimal dimensional change (<0.0002 in/in) and distortion during air hardening. Excellent for precision components. | | **Machinability (Annealed)** | **Very Good** (Approx. 75-80% of 1% carbon steel). Among the most machinable air-hardening tool steels due to lower carbon and favorable microstructure. | | **Grindability** | **Good.** Less demanding than high-alloy tool steels; standard aluminum oxide wheels with proper cooling are effective. | | **Thermal Conductivity** | ~ 33.5 W/m·K at 20°C (Higher than many tool steels) | | **Coefficient of Thermal Expansion** | ~ 11.6 × 10⁻⁶/°C (20-100°C) | | **Deep Hardenability** | **Excellent.** Can through-harden sections up to 150-175mm (6-7") with proper air quenching due to high manganese content. | --- ## **Heat Treatment Guidelines** | Process | Parameters | | :--- | :--- | | **Annealing** | Heat to 790-815°C (1450-1500°F), slow furnace cool at ≤22°C/hour (40°F/hour) to 480°C (900°F), then air cool. Result: 200-235 HB. | | **Stress Relieving** | 650-675°C (1200-1250°F) for 1-2 hours, air cool. | | **Preheating** | **Essential:** Preheat at 650-760°C (1200-1400°F) to minimize thermal stress. | | **Austenitizing** | **830-870°C (1525-1600°F).** Soak time: 20-40 minutes per inch of thickness. Higher temperatures increase hardness but reduce toughness. | | **Quenching** | **Air quench** in still or forced air. For sections >100mm, forced air or positive pressure quenching is recommended. | | **Tempering** | **Must begin within 1-2 hours after quenching.** Double temper at 175-540°C (350-1000°F) for minimum 2 hours per cycle. For maximum toughness: temper at 425-540°C (800-1000°F) to achieve 54-56 HRC. | --- ## **Product Applications** AISI A6 excels in **precision applications requiring dimensional stability and toughness**, particularly in large or complex tooling. ### **Primary Applications:** 1. **Precision Gauges & Measuring Tools:** Master gauges, plug gauges, ring gauges, and dimensional standards requiring exceptional stability. 2. **Jigs, Fixtures & Tooling Plates:** Complex fixtures that must maintain accuracy after heat treatment. 3. **Forming Dies & Punches:** For medium-duty forming where dimensional accuracy is more critical than extreme wear resistance. 4. **Shear Blades & Cutting Tools:** For materials where shock resistance is more important than maximum wear (e.g., fibrous materials, certain plastics). 5. **Machine Tool Components:** Wear plates, guide rails, cam plates, and other precision components in machinery. 6. **Thread Rolling Dies & Forming Rolls:** For softer materials where dimensional precision is paramount. 7. **Master Tooling & Patterns:** For reproducing tooling where minimal distortion is essential. ### **Industry Usage:** - **Precision Manufacturing & Metrology** - **Aerospace Tooling & Fixturing** - **Automotive Tool & Die Making** - **Heavy Equipment Manufacturing** - **General Tooling & Machining** --- ## **International Standards & Cross-Reference** AISI A6 has limited direct international equivalents due to its specific composition. | Standard | Designation | Equivalent / Similar Grade | | :--- | :--- | :--- | | **AISI/SAE (USA)** | **Type A6** | - | | **UNS (USA)** | **T30106** | - | | **ASTM (USA)** | A681 | Grade A6 | | **Europe (EN)** | - | No direct common equivalent | | **Germany (DIN)** | **~1.2365** (*closest functional match*) | 55NiCrMoV7 (Different Mn content) | | **Japan (JIS)** | - | No direct common equivalent | | **Sweden (SS)** | **~2710** | - | **Important Note:** The high manganese content (1.80-2.50%) distinguishes A6 from most international grades. DIN 1.2365 (55NiCrMoV7) is often used as a functional substitute but contains only ~0.60% Mn. True chemical equivalents are rare outside North American specifications. --- ## **Technical Comparison Summary** - **vs. A2:** A6 has **significantly higher toughness** and **better dimensional stability** but **lower wear resistance** and **maximum hardness**. - **vs. O1 (Oil-Hardening):** A6 offers **far superior dimensional stability** (air vs. oil quench), **better toughness**, and **deeper hardenability**. - **vs. S7 (Shock Steel):** S7 has **higher impact resistance** at high hardness, but A6 offers **better dimensional stability, machinability, and is less expensive** for many applications. --- ## **Advantages & Considerations** ### **Advantages:** 1. **Exceptional Dimensional Stability:** Minimal distortion during heat treatment, ideal for precision components. 2. **Superior Toughness:** Excellent resistance to chipping and fracture under impact. 3. **Deep & Uniform Hardenability:** Reliable through-hardening in very thick sections with simple air quenching. 4. **Excellent Machinability:** Reduces fabrication time and cost compared to most tool steels. 5. **Predictable Performance:** Consistent response to heat treatment with minimal risk of cracking. ### **Considerations:** 1. **Limited Wear Resistance:** Not suitable for highly abrasive applications or long production runs on abrasive materials. 2. **Lower Maximum Hardness:** Cannot achieve the high hardness levels (>60 HRC) of A2 or D2. 3. **Specialized Application Focus:** Over-engineered for simple tooling; best reserved for applications leveraging its unique stability. 4. **Limited Global Availability:** Primarily a North American grade with limited international equivalents. --- ## **Availability & Processing** ### **Available Forms:** - Round Bars (¼" to 12" diameter) - Flat Bars and Plates - Forged Blocks - Precision Ground Stock - Custom Shapes (on request) ### **Processing Recommendations:** 1. **Machining:** Use carbide tools for optimal results; moderate speeds and feeds with adequate coolant. 2. **Grinding:** Use standard aluminum oxide wheels (46-60 grit, H-I hardness) with proper coolant flow. 3. **EDM:** Can be successfully EDM machined; stress relieve after EDM processing. 4. **Welding:** Not generally recommended for tool applications. If necessary, preheat to 300-400°C (575-750°F) and use low-hydrogen electrodes with post-weld tempering. --- ## **Conclusion** AISI Type A6 tool steel represents a **specialized engineering solution focused on dimensional stability and toughness**. Its unique composition—featuring moderate carbon with high manganese and nickel—makes it the **premier choice for precision tooling applications where minimal distortion during heat treatment is non-negotiable**. While it sacrifices some wear resistance compared to other A-series grades, A6 provides unparalleled dimensional predictability, making it ideal for master gauges, complex fixtures, and tooling components that must maintain exact dimensions throughout their service life. For applications where **dimensional accuracy, impact resistance, and reliable performance in thick sections** are paramount, A6 offers a proven, dependable material solution that bridges the gap between general-purpose tool steels and specialized high-stability alloys. -:- For detailed product information, please contact sales. -: AISI Type A6 Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6665 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 A6 Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type A6 Tool Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type A6 Tool Steel Wire -:- For detailed product information, please contact sales. -:

Packing of AISI Type A6 Tool Steel Wire -:- 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 3136 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