Carpenter,Hampden® High Carbon, High Chrome Tool Steel Rod/Bar (Oil-Wear) (AISI D3)

Carpenter Hampden® High Carbon, High Chrome Tool Steel Rod (Oil-Wear) (AISI D3) Product Information -:- For detailed product information, please contact sales. -: Carpenter Hampden® High Carbon, High Chrome Tool Steel Rod (Oil-Wear) (AISI D3) Synonyms -:- For detailed product information, please contact sales. -:

Carpenter Hampden® High Carbon, High Chrome Tool Steel (Oil-Wear) (AISI D3) Product Information -:- For detailed product information, please contact sales. -: # **Carpenter Hampden® High Carbon, High Chrome Tool Steel (Oil-Wear) (AISI D3)** ## **Premium High-Carbon, High-Chromium Oil-Hardening Tool Steel for Superior Wear Resistance** --- ### **Product Overview** Carpenter Hampden® is a premium oil-hardening, high-carbon, high-chromium cold work tool steel corresponding to the AISI D3 classification. Renowned for its **exceptional wear resistance, high compressive strength, and excellent dimensional stability**, this alloy contains approximately 12% chromium, which forms a high volume of hard chromium carbides in the microstructure. Hampden is specifically engineered for applications where extreme abrasion resistance is paramount, offering performance superior to many air-hardening grades while utilizing a simpler oil-quenching process. Its combination of high hardness potential (up to 64 HRC) and remarkable wear characteristics makes it ideal for long-run production tooling in severe abrasive environments. --- ### **Key Advantages** - **Exceptional Wear Resistance**: High volume of chromium carbides provides outstanding abrasion resistance, superior to most oil-hardening steels - **High Compressive Strength**: Excellent load-bearing capacity under compression - **Good Dimensional Stability**: Predictable, minimal dimensional change during heat treatment - **High Hardness Potential**: Capable of achieving 62-64 HRC after proper heat treatment - **Good Machinability in Annealed State**: Better than many high-alloy tool steels - **Excellent Surface Finish**: Can be polished to mirror-like finishes for critical applications - **Cost-Effective Wear Solution**: Provides D2-like wear resistance with simpler oil-hardening process - **Good Resistance to Galling**: Performs well in metal-to-metal contact applications --- ### **Chemical Composition (%)** | Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | |---------|------------|---------------|-----------------|--------------|--------------|----------------| | **Content** | 2.00-2.35 | 11.00-13.00 | 0.70-1.00 | 0.50-1.10 | 0.10-0.60 | 0.20-0.60 | *Additional Elements:* - Tungsten (W): ≤0.50% - Nickel (Ni): ≤0.30% - Copper (Cu): ≤0.25% - Phosphorus (P): ≤0.030% - Sulfur (S): ≤0.030% *Note: The high carbon and chromium content ensures a substantial volume of hard chromium carbides (Cr₇C₃ and Cr₂₃C₆) for maximum wear resistance.* --- ### **Physical & Mechanical Properties** #### **Physical Properties** - **Density**: 7.70 g/cm³ (0.278 lb/in³) - **Melting Point**: 1370-1420°C (2500-2590°F) - **Thermal Conductivity**: 20.0 W/m·K at 20°C - **Coefficient of Thermal Expansion**: 10.3 × 10⁻⁶/°C (20-100°C) - **Modulus of Elasticity**: 210 GPa (30.5 × 10⁶ psi) - **Specific Heat**: 460 J/kg·K at 20°C - **Electrical Resistivity**: 0.55 μΩ·m at 20°C #### **Mechanical Properties** **Annealed Condition (typical):** - Hardness: 200-240 HB - Ultimate Tensile Strength: 690-830 MPa (100-120 ksi) - Yield Strength: 415-550 MPa (60-80 ksi) - Elongation: 8-12% - Reduction of Area: 25-35% - Machinability Rating: 50% (relative to 1% carbon steel, 100%) **Hardened and Tempered Condition:** - **Typical Hardness Range**: **58-64 HRC** (optimal 60-62 HRC for most applications) - Ultimate Tensile Strength: 1900-2200 MPa (275-319 ksi) - Yield Strength: 1600-1900 MPa (232-275 ksi) - Elongation: 1-3% - Reduction of Area: 5-10% - **Impact Toughness (Charpy V-notch)**: 8-15 J (6-11 ft-lb) at 60 HRC - **Compressive Strength**: 2600-3000 MPa (377-435 ksi) (exceptional) - Transverse Rupture Strength: 2800-3300 MPa (406-479 ksi) - **Abrasion Resistance**: 2-3× better than O1 oil-hardening steel at same hardness **Hardenability Characteristics:** - Fully hardenable in oil up to 100mm (4 inches) diameter - Surface hardness of 64-66 HRC achievable on small sections - Through-hardness typically 1-3 HRC points lower than surface - Dimensional change: typically +0.03% to +0.08% on hardening (excellent stability) #### **Heat Treatment Parameters** 1. **Annealing:** - Temperature: 870-900°C (1600-1650°F) - Cooling: Slow furnace cool to 540°C (1000°F) at 15°C (25°F)/hour, then air cool - Resulting hardness: 200-240 HB - *Critical: Very slow cooling through 760-700°C (1400-1290°F) range to prevent carbide precipitation* 2. **Stress Relieving (after rough machining):** - Temperature: 650-675°C (1200-1250°F) for 1-2 hours - Air cool 3. **Preheating (ESSENTIAL):** - First stage: 550-650°C (1025-1200°F) - Second stage: 800-850°C (1475-1560°F) - Soak time: 30-60 minutes per inch of thickness 4. **Austenitizing:** - Temperature: 950-980°C (1740-1795°F) - Soak time: 20-40 minutes per inch of thickness - *Critical: Overheating causes grain growth and retained austenite* 5. **Quenching:** - Medium: Warm oil (50-65°C / 120-150°F) - Agitation: Vigorous agitation required - Cool to 50-70°C (120-160°F) before tempering - *Note: Air cooling possible for simple shapes but oil preferred* 6. **Tempering:** - **Immediate tempering required** (within 1 hour of quenching) - Temperature range: 150-250°C (300-480°F) for high hardness - Multiple tempering cycles recommended (2-3 tempers) - Typical tempering response: - 150°C (300°F): 63-65 HRC - 175°C (350°F): 62-64 HRC - 200°C (390°F): 61-63 HRC - 225°C (440°F): 60-62 HRC - 250°C (480°F): 58-60 HRC - Duration: 1-2 hours per inch of thickness, minimum 2 hours - Between tempers: Cool to room temperature - For dimensional stability: Sub-zero treatment (-80°C / -110°F) recommended after first temper --- ### **International Standards & Cross-References** | Standard System | Designation | Notes | |----------------|-------------|-------| | **Carpenter** | Hampden® | Proprietary name for premium D3 steel | | **AISI** | D3 | Standard high-carbon, high-chromium oil-hardening steel | | **UNS** | T30403 | Unified Numbering System | | **ISO** | 1.2080 | High-carbon, high-chromium tool steel | | **European (EN)** | X210Cr12 | Equivalent designation (1.2080) | | **German (DIN)** | 1.2080 | Standard designation | | **British (BS)** | BD3 | British specification | | **Japanese (JIS)** | SKD1 | Equivalent high-Cr steel | | **French (AFNOR)** | Z200Cr12 | French equivalent | | **Swedish (SS)** | 2310 | Swedish standard | | **Common Equivalents** | K107, 100Cr12, G-X 210Cr12 | Regional designations | --- ### **Typical Applications** #### **1. Cutting and Blanking Tools** - **Long-Run Blanking Dies**: For abrasive materials (paper, plastics, composites) - **Precision Shear Blades**: For fine blanking and shaving operations - **Slitter Knives**: For paper, plastic film, and thin metal processing - **Cutting Dies**: For leather, textiles, and soft materials - **Punching Tools**: For high-volume hole punching operations - **Notching Tools**: For precision notching applications #### **2. Forming and Drawing Tools** - **Cold Forming Dies**: For non-ferrous metals and softer steels - **Drawing Dies**: For wire, rod, and tube drawing - **Roll Forming Tools**: For continuous forming operations - **Thread Rolling Dies**: For softer materials - **Knurling Tools**: For precision surface patterning #### **3. Wear Parts and Components** - **Wear Plates and Liners**: For abrasive material handling - **Guide Rails and Ways**: For precision machinery - **Bushings and Bearings**: For low-speed, high-load applications - **Gauges and Fixtures**: Master gauges and inspection tools - **Machine Tool Components**: Slides, gibs, and wear surfaces #### **4. Plastic and Rubber Processing** - **Injection Mold Components**: Cavities and cores for abrasive filled plastics - **Extrusion Dies**: For plastic profile extrusion - **Calender Rolls**: For rubber and plastic sheet production - **Mold Inserts**: For high-wear areas in molds #### **5. Specialized Industrial Applications** - **Paper Industry Tools**: Cutters, slitters, and creasing rules - **Textile Industry**: Cutting tools for fabrics and fibers - **Food Processing**: Cutting blades for processing equipment - **Printing Industry**: Cutting and creasing rules for die cutting --- ### **Machining & Fabrication Guidelines** #### **In Annealed Condition (200-240 HB)** - **Machinability**: Fair (50% of 1% carbon steel) - **Recommended Cutting Tools**: Carbide tools strongly recommended - **Turning Speeds**: 40-60 SFM with carbide, 20-35 SFM with HSS - **Milling Speeds**: 35-50 SFM with carbide - **Drilling Speeds**: 20-30 SFM with HSS drills - **Coolant**: Essential for extended tool life - **Chip Characteristics**: Produces short, abrasive chips; use positive rake tools #### **Grinding and Finishing** - **Hardened State Grinding**: Requires careful technique due to high hardness - **Wheel Selection**: Use aluminum oxide (32A-46J-V) or CBN wheels - **Grinding Parameters**: Light passes (0.005-0.015mm / 0.0002-0.0006in) - **Coolant**: Ample flow to prevent grinding burns - **Polishing**: Can achieve exceptional mirror finishes (better than most tool steels) - **Electrical Discharge Machining (EDM)**: Suitable; stress relieve after machining --- ### **Surface Treatment Compatibility** #### **Recommended Treatments** - **Nitriding**: Gas or plasma nitriding for extreme surface hardness (70-72 HRC) - **Hard Chrome Plating**: For additional wear and corrosion resistance - **Titanium Nitride (TiN) Coating**: PVD coating for cutting applications - **Black Oxide**: For corrosion resistance and appearance - **Electroless Nickel**: For corrosion protection in specific applications #### **Benefits of Surface Treatments** - **Extended Tool Life**: 100-400% improvement with appropriate treatments - **Enhanced Wear Resistance**: Surface hardness up to 72 HRC with nitriding - **Corrosion Protection**: Improved resistance to rust and chemical attack - **Reduced Friction**: Better material flow in forming applications - **Anti-Galling Properties**: Reduced adhesion in metal-to-metal contact --- ### **Comparison with Similar Tool Steels** | Property | Hampden (D3) | D2 (Air-Hard) | O1 (Oil-Hard) | A2 (Air-Hard) | |----------|--------------|---------------|---------------|---------------| | **Wear Resistance** | Excellent | Excellent | Good | Very Good | | **Toughness** | Fair | Fair-Good | Good | Good | | **Maximum Hardness (HRC)** | 64-66 | 58-62 | 64-66 | 60-62 | | **Dimensional Stability** | Excellent | Very Good | Excellent | Very Good | | **Machinability** | Fair | Fair | Excellent | Good | | **Distortion Control** | Good | Very Good | Excellent | Very Good | | **Primary Application** | High-wear tools | General high-wear | Precision tools | General tooling | | **Heat Treatment Complexity** | Medium | High | Low | Medium | | **Cost Factor** | Medium | Medium-High | Low | Medium | --- ### **Design and Manufacturing Considerations** #### **Optimal Design Practices** - **Generous Radii**: Minimum 1.0mm (0.040") on internal corners - **Avoid Thin Sections**: Minimum 3mm (1/8") for through-hardening - **Uniform Sections**: To ensure even hardening and minimize distortion - **Stress Relief Features**: Proper reliefs and transitions - **Symmetrical Designs**: To balance stresses during heat treatment #### **Heat Treatment Best Practices** 1. **Thorough Preheating**: Essential due to high alloy content 2. **Controlled Austenitizing**: Avoid temperatures above 980°C (1795°F) 3. **Proper Quenching**: Warm oil with vigorous agitation 4. **Immediate Tempering**: Critical to prevent cracking 5. **Multiple Tempers**: Recommended for maximum dimensional stability 6. **Consider Sub-Zero Treatment**: For maximum hardness and stability #### **Common Pitfalls to Avoid** - Insufficient preheating (causes cracking) - Overheating during austenitizing (causes excessive retained austenite) - Delayed tempering (high risk of quench cracking) - Inadequate quenching agitation (causes soft spots) - Using wrong tempering temperatures (incorrect hardness) --- ### **Economic Justification** #### **Cost-Benefit Analysis** - **Extended Tool Life**: Superior wear resistance reduces tool changes - **Higher Productivity**: Longer runs between maintenance - **Better Part Quality**: Consistent performance and dimensional accuracy - **Reduced Downtime**: Fewer tool changes and sharpening operations - **Versatility**: One material for multiple high-wear applications **Typical ROI**: 3-9 months in high-volume production applications #### **Total Cost Factors** 1. **Material Cost**: Moderate compared to specialized powders 2. **Manufacturing Cost**: Higher machining costs than simpler steels 3. **Heat Treatment Cost**: Standard oil quenching (moderate cost) 4. **Tool Performance**: Excellent for wear applications 5. **Maintenance**: Requires proper grinding equipment and techniques --- ### **Industry-Specific Applications** #### **Metal Stamping and Forming** - **Progressive Dies**: For high-volume stamping operations - **Fine Blanking Tools**: For precision blanking applications - **Draw Dies**: For deep drawing of non-ferrous metals - **Lamination Dies**: For electrical steel laminations #### **Plastics and Rubber** - **Injection Molds**: For glass-filled and mineral-filled plastics - **Compression Molds**: For abrasive rubber compounds - **Extrusion Tools**: For filled plastic compounds - **Blow Mold Components**: For abrasive container materials #### **Paper and Converting** - **Rotary Die Cutting**: For packaging materials - **Slitting Tools**: For paper, film, and foil - **Creasing Rules**: For carton and box making - **Perforating Tools**: For ticket and label production #### **Textile and Apparel** - **Clicker Dies**: For leather and fabric cutting - **Rotary Cutters**: For continuous fabric processing - **Notching Tools**: For garment manufacturing - **Pattern Cutting Tools**: For apparel production --- ### **Technical Specifications & Quality Assurance** #### **Quality Standards** - **Micro-Cleanliness**: Meets ASTM E45 requirements - **Carbide Distribution**: Uniform, fine carbide structure - **Decarburization**: Controlled to ≤0.25mm (0.010") per side - **Hardness Uniformity**: Consistent through specified sections - **Ultrasonic Testing**: Available for critical applications #### **Available Forms** - **Round Bars**: 10mm to 300mm diameter - **Flat Bars and Plates**: Various thicknesses up to 200mm - **Forgings**: Custom shapes and sizes - **Blocks**: Up to 400mm thickness - **Pre-finished Blanks**: Ground, stress-relieved, or rough machined - **Sheets**: For thin gauge applications #### **Certification** - Mill test certificates with full chemical analysis - Hardness and microstructure reports - Traceability to heat and melt numbers - Compliance with international standards - Special testing available (impact, tensile, microcleanliness) --- ### **Safety and Environmental Considerations** #### **Material Safety** - Contains chromium - follow appropriate handling procedures - Grinding dust requires proper ventilation and collection - Quenching oil requires proper handling and disposal - Material safety data sheets available #### **Regulatory Compliance** - ROHS compliant - REACH registered - Conforms to international environmental standards - Suitable for food contact applications with proper surface treatment --- ### **Conclusion** Carpenter Hampden® (AISI D3) represents a specialized high-performance tool steel engineered for applications where wear resistance is the primary consideration. Its unique combination of high carbon and chromium content provides exceptional abrasion resistance through a dense population of hard chromium carbides, while maintaining the manufacturing advantages of oil-hardening steels. **Key Advantages Summary:** 1. **Exceptional Wear Resistance**: Superior abrasion resistance for long-run applications 2. **High Compressive Strength**: Excellent load-bearing capacity 3. **Good Dimensional Stability**: Predictable performance during heat treatment 4. **Excellent Surface Finish**: Capable of mirror polishing for critical applications 5. **Cost-Effective Solution**: Provides premium wear resistance with standard heat treatment For toolmakers and manufacturers facing challenges with premature tool wear in abrasive applications, Hampden offers a reliable, proven solution that bridges the gap between conventional oil-hardening steels and more expensive powder metallurgy grades. While not intended for high-impact applications or those requiring maximum toughness, it excels in environments where tools must maintain sharp edges and dimensional accuracy through extended production runs. When the application demands a tool steel that can withstand severe abrasive wear, that maintains its cutting edge through thousands of cycles, and that provides consistent, predictable performance in demanding production environments, Carpenter Hampden stands as the engineered solution backed by Carpenter's metallurgical expertise and quality assurance. --- *For specific application recommendations, heat treatment guidelines, or technical assistance, consult with Carpenter Technology's technical services team. Always refer to the latest technical data sheets for current specifications and processing recommendations.* -:- For detailed product information, please contact sales. -: Carpenter Hampden® High Carbon, High Chrome Tool Steel (Oil-Wear) (AISI D3) Specification Dimensions Size： Diameter 20-1000 mm Length <6937 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. -: Carpenter Hampden® High Carbon, High Chrome Tool Steel (Oil-Wear) (AISI D3) Properties -:- For detailed product information, please contact sales. -:

Applications of Carpenter Hampden® High Carbon, High Chrome Tool Steel Rod (Oil-Wear) (AISI D3) -:- For detailed product information, please contact sales. -: Chemical Identifiers Carpenter Hampden® High Carbon, High Chrome Tool Steel Rod (Oil-Wear) (AISI D3) -:- For detailed product information, please contact sales. -:

Packing of Carpenter Hampden® High Carbon, High Chrome Tool Steel Rod (Oil-Wear) (AISI D3) -:- 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 Rod 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 3408 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