Pipe-Lok Vales & Fittings Company delivers precision-engineered instrumentation fittings and valves trusted for reliability, safety, and performance in industrial applications with a strong focus on engineering excellence and quality control.
Designed for seawater and marine systems requiring reliable copper-nickel corrosion resistance. Cupro Nickel pressure relief valves provide good resistance to biofouling, erosion corrosion and brine environments in shipbuilding, offshore and desalination systems.
High-Performance Flow & Safety Instrumentation Solutions
Cupro Nickel 90/10 is a copper-nickel alloy with small iron and manganese additions for improved seawater resistance.
| Element | Weight Percentage (%) |
|---|---|
| Copper (Cu) | Balance |
| Nickel (Ni) | 9.0 - 11.0 |
| Iron (Fe) | 1.0 - 1.8 |
| Manganese (Mn) | 1.0 max |
| Zinc (Zn) | 1.0 max |
| Lead (Pb) | 0.05 max |
| Carbon (C) | 0.05 max |
*Composition limits are indicative for the listed grade family; applicable product specifications may vary depending on valve component and product form.
Cupro Nickel 90/10 offers good ductility and moderate strength with excellent seawater compatibility.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 290 MPa min |
| 0.2% Yield Strength | 105 MPa min |
| Elongation | 30% min |
| Hardness | Approx. 90 HB max |
| Density | Approx. 8.9 g/cm3 |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the pressure relief valve component.
Cupro Nickel 70/30 carries a higher nickel content than the 90/10 alloy, giving it greater resistance to high-velocity seawater, impingement attack and elevated temperature service.
| Element | Weight Percentage (%) |
|---|---|
| Nickel (Ni) | 29.0 - 33.0 |
| Iron (Fe) | 0.40 - 1.00 |
| Manganese (Mn) | 1.00 max |
| Zinc (Zn) | 1.00 max |
| Lead (Pb) | 0.05 max |
| Carbon (C) | 0.05 max |
| Sulfur (S) | 0.02 max |
| Phosphorus (P) | 0.02 max |
| Copper (Cu) | Balance |
*Composition limits are as per the applicable ASTM/ASME specification for UNS C71500; actual limits may vary depending on valve component and product form.
In the annealed condition Cupro Nickel 70/30 combines moderate strength with high ductility and excellent resistance to biofouling, making it well suited to marine and offshore relief valve bodies and trim.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 380 MPa min |
| 0.2% Yield Strength | 140 MPa min |
| Elongation | 30% min |
| Hardness | Approx. 90 HB |
| Density | Approx. 8.94 g/cm³ |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the pressure relief valve component.
High-performance material specifications for our complete Pressure Relief Valve range.
Designed for demanding pressure systems where material compatibility, corrosion resistance and reliable pressure protection are essential.
Used in seawater cooling, ballast and shipboard pressure systems.
Suitable for splash zone and seawater handling instrumentation.
Reliable for brine and seawater pressure protection.
Used in condenser and cooling water circuits.
Applicable for corrosion-resistant marine safety systems.
Used where salt-laden environments demand copper-nickel performance.
Pipe-Lok Vales & Fittings manufactures high-quality alternatives to the following standard industry part numbers
| Swagelok Part No. | Pipe-Lok Vales & Fittings Equivalent | Availability |
|---|---|---|
| SS-4R3A | Available | Ready to Ship |
| SS-4R3A1 | Available | Ready to Ship |
| SS-4R3A5 | Available | Ready to Ship |
| SS-4R3A5-BU | Available | Ready to Ship |
| SS-4R3A5-EP | Available | Ready to Ship |
| SS-4R3A5-KZ | Available | Ready to Ship |
| SS-4R3A5-NE | Available | Ready to Ship |
| SS-4R3A5-RT | Available | Ready to Ship |
| SS-4R3A-BU | Available | Ready to Ship |
| SS-4R3A-EP | Available | Ready to Ship |
| SS-4R3A-KZ | Available | Ready to Ship |
| SS-6R3A-MM | Available | Ready to Ship |
| SS-8R3A-MM | Available | Ready to Ship |
| SS-R4M8F8 | Available | Ready to Ship |
| SS-R4M8S8 | Available | Ready to Ship |
| SS-R4S8 | Available | Ready to Ship |
| SS-R4S12MM | Available | Ready to Ship |
| SS-RL3M4-F4 | Available | Ready to Ship |
| SS-RL3M4F4-RT | Available | Ready to Ship |
| SS-RL3M4-S4 | Available | Ready to Ship |
| SS-RL3S4 | Available | Ready to Ship |
| SS-RL3S4-SC11 | Available | Ready to Ship |
| SS-RL3S4-EP | Available | Ready to Ship |
| SS-RL3S4-MO | Available | Ready to Ship |
| SS-RL3S4-KZ-11002 | Available | Ready to Ship |
| SS-RL3S6MM | Available | Ready to Ship |
| SS-RL3S8MM | Available | Ready to Ship |
| SS-RL4M8F8 | Available | Ready to Ship |
| SS-RL4MR8 | Available | Ready to Ship |
| SS-RL4S8 | Available | Ready to Ship |
| SS-RL4S12MM | Available | Ready to Ship |