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ASME SB171 C61400 Copper Forged Disc for Pressure Vessel Parts
Uncompromised Core for Critical Applications
The SB171 C61400 Forged Disc represents the pinnacle of material integrity and performance in aluminum bronze. Engineered as the superior starting stock for high-value components, our forged discs offer unparalleled structural uniformity, mechanical strength, and reliability. They are the optimal choice for machining mission-critical parts such as high-pressure valve bodies, heavy-duty bearing housings, large bushings, gear blanks, and sealing surfaces that operate under extreme stress, wear, and corrosive conditions.
Why Start with a C61400 Forged Disc?
Forging transforms the C61400 alloy, delivering fundamental advantages over cast alternatives:
Superior Structural Integrity: The forging process eliminates internal porosity, shrinkage, and inclusions common in castings, ensuring a homogeneous and defect-free material.
Isotropic Behavior: Unlike rolled bars with directional properties, our forged discs provide more uniform mechanical characteristics in all directions, making them ideal for complex parts with multi-axial stress loads.
SB171 Forged Disc: Key Attributes & Benefits
Attribute
Benefit to Your Component
Exceptional Strength & Toughness
Withstands severe impact and cyclic loading, preventing in-service failure.
Outstanding Wear & Galling Resistance
Excellent performance under high friction and marginal lubrication, drastically extending service life.
Superior Corrosion Resistance
Highly resistant to seawater, acids, and alkalis, ideal for marine and chemical processing applications.
Excellent Machinability
Provides reliable and efficient machinability to tight tolerances, despite its high strength.
High Pressure & Temperature Stability
Maintains dimensional stability and mechanical properties under demanding operational environments.
Chemical Composition Comparison: C61400 vs. Common Alternatives
Selecting the right alloy starts with its fundamental chemistry. The table below highlights the distinct elemental makeup of C61400 compared to other popular copper-based alloys.
Alloy (Common Name)
UNS No.
Cu (Copper)
Al (Aluminum)
Fe (Iron)
Ni (Nickel)
Sn (Tin)
Zn (Zinc)
Pb (Lead)
Mn (Manganese)
C61400 (Aluminum Bronze)
C61400
Remainder
9.0 - 11.0
3.0 - 5.0
3.0 - 5.0
-
1.0 max
0.02 max
1.5 max
C93200 (Leaded Tin Bronze)
C93200
81.0 - 85.0
-
0.20 max
0.8 max
6.3 - 7.5
2.0 - 4.0
1.0 - 3.0
-
C95400 (General Al Bronze)
C95400
Remainder
10.0 - 11.5
3.0 - 5.0
1.5 max
-
0.5 max
0.03 max
0.5 max
C63000 (Nickel Al Bronze)
C63000
Remainder
9.0 - 11.0
2.0 - 4.0
4.0 - 5.5
-
1.0 max
0.02 max
1.0 - 2.5
C36000 (Free-Cutting Brass)
C36000
60.0 - 63.0
0.35 max
0.35 max
-
-
Remainder
2.5 - 3.7
-
Key Takeaways from Chemistry:
SB171 C61400 is distinguished by its balanced, high-performance formula of Aluminum, Iron, and Nickel. This synergy creates superior strength, corrosion resistance, and the unique "self-lubricating" anti-galling properties.
vs. C93200 (Tin Bronze): C61400 replaces the softer Tin and Lead with harder Al, Fe, and Ni, resulting in dramatically higher strength and wear resistance, albeit with slightly lower machinability.
vs. C95400: The key differentiator is Nickel (Ni). C61400's higher Ni content (3-5% vs. ≤1.5%) significantly enhances corrosion resistance, particularly against impingement and cavitation in seawater, and improves toughness.
vs. C63000: These are close cousins. C63000 has slightly more mandated Mn and a tighter Ni range. C61400 offers a more generalized, cost-effective high-strength Ni-Al bronze composition.
Material Comparison: Forged Disc vs. Alternative Starting Forms
The table below demonstrates why the SB171 Forged Disc is the superior blank for manufacturing high-performance components.
Variable. Risk of micro-porosity, shrinkage cavities, and segregation.
Depends on bar quality. Potential for centerline porosity or inhomogeneity.
Mechanical Properties
Highest & Most Uniform. Excellent isotropic behavior; optimal strength and toughness throughout.
Lower. Cast microstructure generally results in lower mechanical properties vs. forged.
Anisotropic. Properties are superior in the rolling direction; may be inconsistent across the slice.
Material Utilization
High. Can be supplied in near-net shapes, minimizing machining waste.
Moderate. Requires significant machining allowance to remove casting skin and ensure sound material.
Potentially Lower. Generating a disc from a large bar can result in more scrap material.
Ideal For
Critical, High-Performance Components where reliability, longevity, and performance are non-negotiable.
Non-critical or lightly loaded applications where internal defects are less consequential.
Components where property uniformity is not the primary concern, and the shape is suitable.
Cost Perspective
Higher initial investment justified by superior part reliability, longer lifespan, and reduced risk of in-service failure—lowering Total Cost of Ownership.
Lower initial cost, but carries hidden risks of scrapped parts after machining and potential for premature field failure.
Variable initial cost, but may not deliver the guaranteed performance level of a purpose-forged disc.
Technical Specifications & Availability
Alloy: UNS C61400 (Aluminum Bronze, CuAl10Fe5Ni5)
Product Form: Forged Disc / Cake
Standard Size Range: Diameter: 100mm – 1000mm+ | Thickness: 25mm – 300mm+ (Custom dimensions available upon request)
Condition: As-Forged, Heat Treated, or Machined Surfaces as specified.
Standards: Compliant with ASTM B124, ASME SB124, DIN 17660, and other international specifications.
Your Partner for Premium Performance
Choosing the SB171 C61400 Forged Disc means investing in the most robust and reliable foundation for your critical components. Our rigorous quality control and traceability from raw material to finished disc ensure you receive a product engineered for excellence.
Elevate your component quality and reliability from the very start.
Contact us today for detailed technical data sheets, a quotation for your specific dimensions, or to consult with our engineering team about your application.