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Custom Austempered Ductile Iron (ADI) Casting
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Custom Austempered Ductile Iron (ADI) Casting

Custom Austempered Ductile Iron (ADI) Casting is a specialized heat-treated form of ductile iron, combines high strength, toughness, and wear resistance. Through precise austempering processes, ADI achieves superior mechanical properties—often exceeding traditional steel—while maintaining cost-effective castability and design flexibility. Ideal for demanding applications like gears, heavy-duty components, and automotive parts. Custom ADI allows tailored metallurgical structures to meet specific performance requirements. 

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    What is Austempered Ductile Iron (ADI)?

    Austempered Ductile Iron (ADI) is an advanced engineering material produced through a specialized heat treatment process that transforms standard ductile iron into an ultra-high-performance alloy.

    ✔ Automotive (Differential carriers, Crankshafts, Suspension components)

    ✔ Heavy Machinery (Undercarriage parts for excavators, Gearbox housings)

    ✔ Mining & Construction (Crusher jaws, Drill rig components)

    ✔ Industrial Equipment (High-strength gears, Pump housings) 

    Reference: SAE International - ADI in Automotive Applications

    Key Properties of ADI Castings

    ✅ Exceptional Strength (Tensile strength: 850–1600 MPa)

    ✅ Superior Wear Resistance (2-3x better than standard ductile iron)

    ✅ High Fatigue Strength (Ideal for dynamic load applications)

    ✅ Excellent Impact Toughness (Even at sub-zero temperatures)

    ✅ Lightweight Alternative to Steel (10% weight savings) 

    ADI Grades & Mechanical Properties
    Grade (ASTM A897) Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Typical Applications
    Grade 1 850-1050 550 10% Gears, hydraulic components
    Grade 2 1050-1250 700 7% Agriculture equipment, couplings
    Grade 3 1200-1400 850 5% Heavy-duty truck components
    Grade 4 1400-1600 1100 3% Mining & earthmoving parts

     Quality assurance per ASTM A897

    Our ADI Manufacturing Process

    123.png Free Design Review – Optimize for manufacturability & cost

    123.png Precision Casting  – Air-set or green sand molding / In-process quality checks

    123.png Austempering Heat Treatment - Computer-controlled salt baths (325-400°C range)

    123.png Post-Processing - Machining (CNC milling/turning), Shot blasting for fatigue resistance

    Technical Advantages of Our ADI Castings

    ✔ Controlled Surface Hardness (HRC 38-55)

    ✔ Uniform Properties throughout cross-sections

    ✔ Reduced Machining Costs vs. steel (25-40% savings)

    ✔ Sustainable Production (95% recycled material content)

    CNC Machining
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    316 stainless steel investment casting
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    ADI Casting
    Cast iron wheel
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    PRODUCTION FOLW CONTROLCONTROL

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    Raw Material Quality Control

    1. Strictly monitor the chemical composition, purity, and impurity levels of metal materials (e.g., pig iron, scrap steel, alloys).
    2. Conduct performance tests (e.g., permeability, strength) on auxiliary materials such as casting sand and binders.
    control 2_1

    Melting Process Control

    1. Precisely control melting temperature (avoid overheating or insufficient heating).
    2. Ensure compositional uniformity with rapid chemical analysis before pouring.
    3. Perform deoxidation and degassing (vacuum melting for critical castings).
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    Mold/Core Quality Control

    1. Mold dimensional accuracy must meet drawing requirements (focus on parting surfaces, draft angles, etc.).
    2. Sand compactness, moisture content, and permeability must comply with process standards.
    3. Monitor curing levels for special processes like resin sand and lost foam casting.
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    Gating System Design Control

    1. Scientifically design gating systems (sprue, runner, and ingate ratios).
    2. Control pouring temperature (typically 50-150°C above the liquidus line).
    3. Use appropriate pouring speeds to avoid turbulence-induced gas entrapment.
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    Solidification Process Control

    1. Implement directional solidification techniques (e.g., mold temperature control, chill placement).
    2. Apply progressive solidification for critical components.
    3. Monitor cooling curves against expected profiles.
    control 6_1

    Post-Processing Control

    1. Strictly manage timing and methods for sand removal and riser cutting.
    2. Standardize heat treatment (annealing/normalizing/quenching with parameter logs).
    3. Control aging treatment time and temperature.
    control 7_1

    Dimensional & Defect Inspection

    1. Full-scale dimensional inspection (100% verification of critical dimensions).
    2. Apply non-destructive testing (X-ray, ultrasonic, magnetic particle inspection, etc.).
    3. Sample tests for microstructure and mechanical properties.
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    Traceability Management

    1. Maintain comprehensive records per batch (heat number, operators, timestamps, etc.).
    2. Archive process inspection data and visual documentation.
    3. Establish a complete quality file system.
    CERTIFICATE
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    One-stop serviceSSERVICES

    why_1
    CNC MACHINIG
    ✔ Multi-Material Machining — Aluminum, Steel, Titanium, Stainless Steel (17-4 PH), Plastics, etc.
    ✔ Multi-Axis CNC Machining — 3/4/5 Axis CNC for Complex Geometries
    ✔ Precision Grinding & Polishing — Surface Finish up to Ra 0.4μm
    ✔ Customized Production — From Small-Batch Prototyping to Large-Scale Mass Production
    ✔ Rigorous Quality Control — Full-Process CMM Inspection, Compliant with ISO 9001 Standards
    why_2
    hEAT TREATMENT
    We offer customized heat treatment processing services, 
    ✔  Annealing (eliminates internal stress, improves machinability) 
    ✔  Quenching & Tempering (enhances hardness and toughness) 
    ✔ Precipitation Hardening (e.g., 17-4 PH, H900/H1150) 
    Carburizing & Nitriding (improves surface wear resistance) 
    ✔  Vacuum/Controlled Atmosphere Heat Treatment (prevents oxidation, suitable for precision components)
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    SURFACE TREATMENT
    ✔ Coatings & Platings:
    ○ Electroplating (Zinc Plating, Nickel Plating, Chrome Plating, Electroless Nickel Plating, etc.)
    ○ Anodizing (Hard Anodizing for Aluminum, Color Anodizing)
    ○ PVD/CVD (TiN, CrN, DLC, and Other Hard Coatings) ○ Thermal Spraying (Plasma Spraying, Arc Spraying)
    ✔ Conversion Coatings:
    ○ Passivation (Stainless Steel, Aluminum Alloys)
    ○ Phosphating (Rust Prevention for Steel, Enhanced Paint Adhesion)
    ○ Blackening/Bluing (Aesthetics and Basic Rust Resistance)