While both C63200 and C63000 are high-performance copper-based alloys governed by ASTM B150, they serve distinct roles in mission-critical engineering. Selecting the correct alloy depends on whether your application prioritizes maximum yield strength or structural shock resistance.
Side-by-Side Mechanical Properties (TQ50 Temper)
In the Quench and Tempered (TQ50) condition, the mechanical “personalities” of these alloys are clearly defined:
| Property | C63000 (Nickel Aluminum Bronze) | C63200 (Nickel Aluminum Bronze) |
|---|---|---|
| Tensile Strength (min) | 110,000 psi | 92,000 psi |
| Yield Strength (min) | 68,000 psi | 48,000 psi |
| Elongation (in 2") | 10% | 15% – 20% |
| Hardness (Brinell) | 201 – 248 HB | 185 – 225 HB |
| Impact Strength | Moderate | Superior (Shock Resistant) |
Chemical Composition & Metallurgical Differences
The mechanical variance is a direct result of the specific elemental balance within the ASTM B150 framework.
- Aluminum Content: C63000 contains slightly higher Aluminum levels (9.0% – 11.0%), which creates a harder, higher-strength matrix. This makes it the premier choice for wear-resistant components like gears and rudders.
- Iron-to-Nickel Ratio: C63200 is engineered with a higher Iron content (3.0% – 5.0%) and a controlled Nickel ratio. When combined with the TQ50 heat treatment, this prevents “selective phase corrosion,” making it the gold standard for naval hull-integrity.
Choosing the Right Alloy for Your Project
When to Specify C63000 (The Strength Leader)
C63000 is the preferred alloy for aerospace and heavy industrial applications. Choose this material when your primary concerns are:
- Extreme Load Bearing: Components that must resist deformation under immense pressure.
- Anti-Galling: High-friction environments like landing gear bushings and sleeve bearings.
- Industrial Hardness: Wear plates and precision-machined gears.
When to Specify C63200 (The Naval Standard)
C63200 is the “Sub-Safe” choice for naval defense. Choose this material when your project requires:
- Fracture Toughness: The ability to absorb physical shock or impact without catastrophic failure.
- Seawater Immunity: Specifically for critical valves and piping systems exposed to stagnant or high-velocity saltwater.
- Strict Testing Compliance: Applications requiring mill-certified T9074-AS-GIB Ultrasonic Testing (mandatory for 4″ diameters and larger).
The Standard Metals Advantage
Since 1978, Standard Metals, Inc. has specialized in bridging the gap between mill production and precision naval requirements.
- Diverse Inventory: We stock C63000 in both HR50 and TQ50 tempers, and C63200 in the naval-grade TQ50 condition.
- Approved Procedures: We maintain approved VPARs from our vendors, ensuring all T9074 Ultrasonic Testing documentation is audit-ready.
- Precision Cutting: Our Horizontal Bandsaw services provide clean, accurate cuts for large-diameter rods and bars.
Request a Technical Comparison
Not sure which alloy meets your specific Specifications? Request a Technical Comparison or call our alloy experts at 1-800-243-2224.