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Ni-Resist Casting for Submersible Pump Impeller & Diffuser
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submersible pump impeller diffuser.webp
submersible pump impeller.webp

Ni-Resist Casting for Submersible Pump Impeller & Diffuser

Ni-Resist cast iron is a high-performance austenitic cast iron alloy, widely used in submersible pump impellers and diffusers due to its exceptional corrosion resistance, wear resistance, and mechanical strength. Its unique composition, including significant nickel content, ensures durability in harsh environments, such as seawater, acidic fluids, or abrasive media. The material's thermal stability and resistance to cavitation erosion make it ideal for demanding pumping applications, ensuring extended service life and reduced maintenance costs.

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    Why Choose Ni-Resist Castings for Submersible Pumps?

    Submersible pumps operate in aggressive environments—seawater, wastewater, brine, and chemical fluids—requiring materials that resist corrosion, erosion, and cavitation damage. Ni-Resist (D5, D5S, D2, D2M grades) is a high-nickel cast iron alloy offering exceptional durability in extreme conditions. 
    At SIMIS, we specialize in precision-cast Ni-Resist impellers and diffusers, ensuring long service life in demanding pump applications. 

    ✔ Superior corrosion resistance – Ideal for seawater, acidic & alkaline media

    ✔ High wear & cavitation resistance – Extends pump lifespan

    ✔ Excellent castability & machining properties – Tight tolerances achievable

    ✔ Compliance with ASTM A439 / EN 13835 standards

    Applications of Ni-Resist Submersible Pump Components

    🔹 Desalination plants – Seawater reverse osmosis (SWRO) pumps

    🔹 Oil & gas industry – Brine and corrosive fluid handling

    🔹 Marine & offshore – Ballast and bilge pumps

    🔹 Wastewater treatment – Submersible sewage pumps

    📌 Case Study: A European pump manufacturer switched to our D5S Ni-Resist impellers, reducing corrosion failures by 80% in high-salinity environments. 

    Our Ni-Resist Casting Capabilities
    Parameter Specification
    Material Grades D2, D2M, D5, D5S
    Casting Process investment casting, shell molding
    Size Range 50mm – 500mm diameter
    Surface Finish Ra 6.3μm (or customized)
    NDT Testing X-ray, UT, dye penetrant
    Machining Support CNC milling, turning, balancing

    🔗 Learn more: Ni-Resist Alloy Properties (ASM International) 

    Why Partner with SIMIS?

    123.png  30+ years of foundry experience

    123.png  ISO 9001:2015 certified

    123.png  Full traceability – from raw material to final part

    123.png  Global supply – OEMs in Europe, USA, and Asia 

    CNC Machining
    aluminum alloy casting
    iron casting parts
    valve body
    304 stainless steel investment casting
    aluminum casting
    aluminum die casting
    Gearbox
    welding parts
    316 stainless steel investment casting
    316 stainless steel valve body
    ADI Casting
    Cast iron wheel
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    PRODUCTION FOLW CONTROLCONTROL

    control 1_1

    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).
    control 3_1

    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.
    control 4_1

    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.
    control 5_1

    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.
    control 8_1

    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
    ISO_副本
    TUV_副本
    CE_副本
    SGS_副本
    ROHS_副本
    0102

    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)
    why_3
    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)