Copper Nickel 70/30 Pipes & Tubes, manufactured from UNS C71500 material, are high-performance copper nickel 70 30 alloys containing approximately 70% copper and 30% nickel with iron and manganese additions for enhanced corrosion resistance.
Also referred to as C71500 copper nickel, CuNi 70 30, ASTM B111 C71500, or SB111 C71500, this grade is specifically engineered for severe marine and offshore environments where seawater corrosion, erosion resistance, and long service life are critical.
As part of our Copper Nickel Pipes & Tubes range, this copper nickel 70 30 grade offers superior strength compared to 90/10 alloys and is widely used in condensers, heat exchangers, desalination plants, and offshore firewater systems.
USA Piping Solution supplies copper nickel 70 30 pipes and tubes in seamless and welded forms with full compliance to ASTM B111 C71500 and ASME SB111 C71500 specifications.
UNS C71500 Copper Nickel 70/30 Pipes & Tubes Specifications
Parameter |
Details |
|---|---|
Standards |
ASTM B111, ASTM B543, ASTM B552 / ASME SB111, SB543, SB552 |
Dimensions |
ASTM, ASME, API |
Tube Size |
1/2″ to 6″ OD & NB in various SWG & SCH |
Type |
Seamless / ERW / Welded / Fabricated |
Form |
Round, Hydraulic |
Length |
Single Random, Double Random, Cut Length |
End Finish |
Plain End, Beveled End, Threaded |
Chemical Composition of C71500 Material – Copper Nickel 70 30
Element |
Copper (Cu) |
Nickel (Ni) |
Iron (Fe) |
Manganese (Mn) |
Zinc (Zn) |
Lead (Pb) |
|---|---|---|---|---|---|---|
Percentage |
65.0% min |
29 – 33% |
0.4 – 1.0% |
1.0% max |
1.0% max |
0.05% max |
The balanced composition of this C71500 material ensures excellent resistance to chloride stress corrosion cracking, biofouling, and seawater erosion.
Mechanical Properties of Cupro Nickel 70/30 Tubes
Density |
Melting Point |
Yield Strength (0.2% Offset) |
Tensile Strength |
Elongation |
|---|---|---|---|---|
0.323 lb/in³ at 68°F |
2260°F |
20,000 psi |
50,000 psi |
30% |
These mechanical properties make ASTM B111 C71500 tubes suitable for high-pressure marine and industrial systems.
Equivalent Grades for Cu-Ni 70/30 Pipes & Tubes
Standard |
UNS |
Werkstoff Nr. |
|---|---|---|
Cupro Nickel 70/30 |
C71500 |
2.0882 |
UNS C71500 is internationally recognized for marine-grade copper nickel 70 30 applications.
Types of Copper Nickel 70/30 Pipes and Tubes
- Copper Nickel 70/30 Seamless Pipes
- Copper Nickel 70/30 Seamless Tubes
- Copper Nickel 70/30 Welded Pipes
- Copper Nickel 70/30 Welded Tubes
- Copper Nickel 70/30 ERW Pipes
- Copper Nickel 70/30 ERW Tubes
All CuNi 70 30 pipes are supplied with mill test certificates confirming ASTM B111 C71500 and SB111 C71500 compliance.
Copper Nickel 70 30 Price
Size |
Price (USD) |
Price (INR) |
|---|---|---|
25.00MM OD X 2.11 MM THK |
$9.45 |
788.00 |
11.11 MM OD X 0.81 MM WT |
$11.48 |
957.28 |
12.70 MM OD X 0.81 MM WT |
$14.68 |
1224.12 |
70 30 CuNi Tube Dimensions
Size (in) |
Wall Thickness (in) |
Outside Diameter (in) |
Approx Weight (lbs/ft) |
|---|---|---|---|
3/8 OD |
0.049 |
0.38 |
0.2 |
2-1/2 |
0.38 |
2.88 |
12.1 |
1/4 OD |
0.035 |
0.25 |
0.1 |
1/4 |
0.072 |
0.54 |
0.43 |
1/2 |
0.120 |
0.84 |
1.1 |
3/8 |
0.095 |
0.68 |
0.19 |
1 |
0.180 |
1.32 |
2.61 |
1-1/4 |
0.220 |
1.66 |
2.18 |
3/4 |
0.148 |
1.05 |
1.71 |
1-1/2 |
0.25 |
1.9 |
5.25 |
2 |
0.340 |
2.38 |
8.85 |
3 |
0.46 |
3.5 |
18.7 |
Custom sizes available in ASTM B111 C71500 specification.
Applications of Copper Nickel 70 30 Pipes & Tubes
- Offshore oil drilling platforms: Used in seawater cooling, fire-water, and hydraulic systems due to excellent resistance to seawater corrosion and erosion.
- Marine & seawater piping systems: Ideal for shipbuilding and desalination plants because of strong biofouling and chloride corrosion resistance.
- Heat exchangers & condensers: Commonly used where seawater or brackish water is the cooling medium, offering reliable heat transfer and long service life.
- Power generation plants: Applied in condensers and cooling circuits for stable performance under high temperature and pressure conditions.
- Petrochemical & chemical processing: Suitable for handling corrosive chemicals and process fluids with good strength and corrosion resistance.
- Gas processing units: Used in cooling and condensate systems due to resistance to moisture-related corrosion.
- Pharmaceutical & chemical equipment: Used in process piping and heat exchangers where cleanliness and material stability are required.
- Pulp & paper industry: Applied in heaters and cooling systems handling corrosive process liquids.
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