Corrosion-Resistant Nickel Aluminum Bronze Seal Seats

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Product Specifications
Name： Aluminum Bronze Seal Seat
Standard： ASTM B148 / B505, UNS C95400 / C95500 / C95800, RoHS Compliant, REACH Compliant
Material： C95400 (Aluminum Bronze), C95500 / C95800 (Nickel Aluminum Bronze)
Surface： Precision Ground, Lapped for Superior Sealing, Optional PTFE Coating
Inner Diameter (ID)： 20mm – 500mm
Outer Diameter (OD)： 40mm – 800mm
Height/Thickness： 10mm – 200mm
Product Features: Outstanding seawater and chemical corrosion resistance · High compressive strength · Excellent wear and erosion resistance · Superior impact toughness · Good thermal stability · Low friction and anti-galling properties · Reliable sealing under high pressure
Application Field: Gate/globe/check/ball valves, Marine propulsion and offshore platforms, Oil & gas pipelines and refineries, Chemical processing equipment, Pump housings and impellers, Desalination plants, Power generation, Cryogenic applications, Severe service industrial valves

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Aluminum Bronze Seal Seat – Process & Quality Assurance Statement
Our aluminum bronze seal seats are designed and manufactured to provide long-term, leak-free performance in aggressive service conditions where standard materials would fail prematurely.

Key process features

Production follows a rigorous sequence to ensure dimensional accuracy and material integrity:
●Material Selection: Only certified ingots meeting exact UNS composition are used, with pre-melt chemical analysis.
●Casting Method: Sand casting or centrifugal casting produces dense, defect-free blanks with controlled grain structure.
●Heat Treatment: Full annealing cycle relieves stresses and optimizes hardness and toughness balance.
●Rough Machining: CNC lathes establish basic geometry and prepare sealing surfaces.
●Precision Finishing: Critical seating surfaces are ground and lapped to mirror-like finish (typically Ra ≤0.2 μm) for optimal valve sealing.
●Optional Treatments: Hard facing or polymer coatings applied where enhanced wear or low-friction is required.
●Cleaning & Protection: Ultrasonic cleaning followed by protective oiling and secure packaging.

Quality control system

● Full traceability from melt batch to finished seat
● Retention of test samples and records ≥3 years for third-party re-verification (SGS, BV, TÜV, etc.)
● 100% inspection of critical characteristics:
• Chemical composition (stationary spectrometer)
• Mechanical properties (tensile, hardness, and impact testing on witness samples)
• Dimensional accuracy (CMM and optical measurement; typical tolerance ±0.02mm on sealing faces)
• Surface finish and flatness (profilometer and optical flats)
• Non-destructive testing (dye penetrant + ultrasonic for subsurface defects)
● Internal specifications exceed ASTM B148 and API 6D requirements where applicable. Typical C95800 properties: Tensile strength ≥690 MPa, Yield strength ≥345 MPa, Exceptional resistance to cavitation and seawater corrosion.
● ISO 9001:2015 certified facility ensures every seal seat meets or exceeds expectations for critical valve applications.