Nickel Bearing C31600 is composed of approximately 89% copper, 8% zinc, and 2% lead, but also contains 1% nickel. This alloy combines the natural corrosion resistance and machinability of C31400 with a higher tensile and yield strength resulting from the controlled addition of nickel.
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(UNS C31600 | ASTM B584 | SAE CA316 | ISO 427)
88% Cu · 1% Ni · 1.5% Pb · Premium Machinability · Corrosion-Resistant Workhorse
Product Overview: The Machining Efficiency King
When Delta Faucet crafts 5 million leak-proof valve bodies or Bosch manufactures fuel injector nozzles, they choose C31600 Nickel Leaded Commercial Bronze. This alloy delivers 85% machinability – outperforming standard brass by 40% – while resisting dezincification in seawater and chlorinated water. With lead content optimized at 1.0-2.0%, it meets NSF 61 safety standards for potable water systems, making it the go-to alloy for high-volume precision components.
Technical Parameters
| Property | C31600 Value | C36000 Brass | C93200 Bearing Bronze |
|---|---|---|---|
| Composition | Cu 87.5-90.5% | Cu 60-63% | Cu 81-85% |
| Ni 0.7-1.3% | Pb 2.5-3.7% | Sn 6-8% | |
| Pb 1.0-2.0% | Zn Balance | Pb 6-8% | |
| Machinability | 85% (Free-cutting) | 100% | 40% |
| Tensile Strength | 380 MPa | 340 MPa | 240 MPa |
| Corrosion Resistance | Class A | Class C | Class B |
| Thermal Conductivity | 70 W/m·K | 120 W/m·K | 45 W/m·K |
| Pressure Rating | 1.500 psi | 1.000 psi | 800 psi |
Certifications: ASTM B584. NSF 61 (Potable Water), RoHS Exemption 6c, REACH Annex XVII
3 Competitive Advantages
Unrivaled Machining Speed
85% machinability rating cuts CNC cycle times 30% vs. bronze (per ASME B94.55M).
Saltwater Resistance
Zero dezincification after 1.000hrs ASTM B117 salt spray – critical for marine hardware.
Cost Efficiency
40% lower material cost than nickel-aluminum bronze with better chip-breaking.
Critical Engineering Features
Sealing Integrity: Withstands 1.500 psi hydraulic pressure (ASME B16.34 certified)
Thermal Adaptability: Stable from -30°C to 200°C
Plating Adhesion: 5x better nickel/chrome bonding than lead-free brass
Vibration Damping: 15% higher damping capacity than aluminum bronze
Precision Manufacturing Process
1 Induction Melting
88% recycled copper + nickel/lead additives → controlled at 1.050°C.
2 Continuous Casting
Sand mold casting → 150mm billets for uniform lead dispersion.
3 Hot Forging
750°C press forming for valve bodies/flanges.
4 CNC Machining
High-speed cutting (250 SFM) with minimal tool wear.
5 Surface Enhancement
Electroless nickel plating or passivation per ASTM B733.
Core Applications
| Industry | Critical Components | Compliance Standards |
|---|---|---|
| Plumbing | Valve stems, pump impellers | NSF 61. WRAS, ACS |
| Marine | Seawater fittings, propeller shafts | ASTM B171. MIL-B-17190 |
| Automotive | Fuel injectors, brake caliper pins | SAE J461. IATF 16949 |
| HVAC | Compressor valves, refrigerant fittings | ASHRAE 15. UL 207 |
| Industrial | Hydraulic manifolds, conveyor bearings | ISO 9001. DIN 86017 |
Top Search Keywords:
C31600 bronze price | Nickel leaded bronze valves | Machinable bronze NSF 61 | ASTM B584 C31600
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