Special Die-Cast Copper Alloy C99700

Alternative Material Options

For applications requiring higher copper content and superior corrosion resistance, Aluminum Bronze C95400 offers excellent performance in marine-grade applications. When superior machinability is the primary concern, Leaded Free-Cutting Brass C48500 provides unparalleled cutting performance. For general-purpose brass applications with good overall properties, Brass 360 serves as a reliable alternative. In high-strength applications where the characteristics of silicon brass are preferred, Silicon Brass C87850 offers similar benefits with variations in composition. For traditional bronze applications requiring excellent bearing properties, Leaded Bronze C83600 remains a proven choice. When considering non-copper alternatives for cost-sensitive applications, high-performance ZA-8 zinc alloy or A514 aluminum alloy may be evaluated based on specific property requirements.

International Equivalent / Comparable Grade

Design Purpose

C99700 was specifically engineered to overcome the limitations of conventional brass alloys in demanding die-casting applications where components face combined challenges of mechanical stress, corrosive environments, and complex geometry requirements. The alloy's sophisticated composition was developed to provide exceptional fluidity for filling thin sections and intricate details while maintaining high mechanical strength and outstanding corrosion resistance. This design purpose makes it ideally suited for marine hardware, pump components, and industrial valves that must withstand harsh operating conditions. The addition of multiple alloying elements creates a synergistic effect that enhances both castability and in-service performance, positioning C99700 as a premium solution for applications where conventional brasses would fail prematurely or require excessive wall thickness to meet strength requirements.

Chemical Composition

Physical Properties

Mechanical Properties

Key Material Characteristics

• Exceptional combination of high strength and good corrosion resistance

• Superior resistance to dezincification and stress corrosion cracking

• Excellent fluidity and castability for complex, thin-wall components

• Good pressure tightness suitable for hydraulic and pneumatic applications

• Outstanding wear resistance and anti-galling properties

• Maintains mechanical properties at elevated temperatures

• Good machinability despite high strength characteristics

• Excellent surface finish capabilities for both functional and decorative parts

• Superior fatigue strength for dynamic load applications

• Compatible with wide range of post-processing treatments

Manufacturability And Post Process

• Copper Die Casting: Primary manufacturing process leveraging excellent fluidity

• Post Machining: Good machinability enables precision finishing of critical features

• CNC Machining: Capable of maintaining tight tolerances (±0.03 mm) on machined surfaces

• Drilling and Tapping: Produces clean threads and holes with moderate tool wear

• Sand Blasting: Effective for surface preparation and uniform texture creation

• Tumbling: Suitable for deburring and edge radiusing of cast components

• Grinding and Polishing: Achieves high surface finish quality for wear surfaces

Suitable Surface Treatment

• Electroless Nickel Plating: Provides uniform corrosion protection and wear resistance

• Chromate Conversion Coating: Enhances corrosion resistance while maintaining conductivity

• Powder Coating: Offers durable, colored finishes for architectural applications

• Passivation Treatments: Improves tarnish resistance in atmospheric exposures

• Polishing and Clear Coating: Preserves metallic appearance while preventing oxidation

• Electropolishing: Creates micro-smooth surfaces for reduced friction and fouling

Common Industries and Applications

• Marine hardware, propeller shafts, and underwater fittings

• Industrial pump housings, impellers, and valve components

• Heavy equipment bearings, bushings, and wear plates

• Architectural fittings for coastal and harsh environments

• Chemical processing equipment and corrosion-resistant components

• Power generation components exposed to steam and water

• Mining equipment parts requiring abrasion resistance

When to Choose This Material

• Marine and corrosive environments: Superior resistance to saltwater corrosion and dezincification

• High-strength requirements: Tensile strength exceeding 500 MPa for structural applications

• Complex thin-wall designs: Excellent fluidity enables casting of intricate geometries

• Wear-resistant applications: Outstanding anti-galling and abrasion resistance

• Pressure-containing components: Reliable pressure tightness for hydraulic systems

• Elevated temperature service: Maintains mechanical properties up to 200°C

• Dynamic load conditions: Superior fatigue strength for moving components