Nov 17, 2025 Leave a message

ASTM B111 CUNI 70/30 copper-nickel alloy pipes for seawater environments

C71500 Copper Nickel Tubes PDF

C71500 Copper Nickel Size & Price PDF

 

What is a C71500 copper nickel tube?

We are a professional manufacturer and exporter of copper-nickel alloy pipes in China. Our products include C71500 copper-nickel pipes, BFe30-1-1, CuNi30Mn1Fe, and CUNI 70/30 copper-nickel alloy pipes conforming to ASTM B111 standards.

Our Chinese-made C71500 copper-nickel alloy, also known as 70/30 copper-nickel alloy, has excellent corrosion resistance, making it particularly suitable for seawater environments. Forged copper-nickel alloys commonly used in seawater environments contain 30% nickel.

 

Product Features

1. High Corrosion Resistance: Excellent performance in seawater, weak acids, and high-temperature oxidation (corrosion rate ≤0.003 mm/a).

2. Mechanical Excellence: Tensile strength 350-550 MPa, elongation 20-40%, combining toughness and plasticity.

3. Machinability: Supports cold/hot working, welding (TIG/MIG), and deep drawing; surface finish up to Ra 0.1μm.

4. Temperature Adaptability: Design temperature up to 371°C (annealed state), no brittleness at cryogenic conditions.

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C71500 Pipes Chemical Composition

ASTM B111 C71500
Ni% 29.0-33.0
Fe% 0.4-1.0
Mn% Max. 1.0
C% Max. 0.05
Pb% Max. 0.02
S% Max. 0.02
P% Max. 0.02
Zn% Max. 0.50
Zr%
Others Max. 0.50
Cu% Balance

 

C71500 Mechanical Properties

Standard Temper Former Temper Copper Alloy UNS Nos. Tensile Strength, min Yield Strength At 0.5% extension under load min Rockwell Hardness 30T
      ksi Mpa ksi Mpa  
OS025 Nominal Grain Size 0.025 mm C71500 60 414 25 172 46
OS035 Nominal Grain Size 0.025 mm C71500 54 372 40

 

Price List for C71500 Copper (in USD per kg)

Product Type Price Range (USD/kg)
C71500 Copper Sheets & Plates $22.0 – $27.0
C71500 Copper Pipes & Tubes $23.0 – $28.0
C71500 Copper Bars & Rods $21.0 – $25.0
C71500 Copper Angles & Channels $22.5 – $26.0
C71500 Copper Beams $23.0 – $27.0

 

Our spot inventory

ASME SB111 C71500

C71500 seamless condenser tube

C71500 welded copper nickel pipe

ASTM B111 C71500

ASTM B466 C71500 pipe

C71500 cupronickel boiler tube

70/30 copper nickel pipe

C71500 heat exchanger tube

C71500 welded copper nickel pipe

SB111 UNS C71500

70/30 cupronickel condenser tube

ASTM B111 C71500 heat exchanger tube

C71500 copper nickel pipe

ASTM B111 C71500 heat exchanger tube

ASME SB111 C71500 copper nickel pipe

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About us

Gnee is a premier manufacturer and international supplier of comprehensive copper and copper alloy products, committed to delivering excellence in copper tubes, copper sheets, copper plates, copper bars, copper rods, copper wires, and copper strips.

 

Our Extensive Product Portfolio & Specifications:

Copper Tubes & Pipes:
We supply a full range including **Capillary Tubes, Thin-Walled Copper Tubes, Thick-Walled Copper Tubes, Round Pipes, Square Pipes, Rectangular Pipes, Welded Pipes, Seamless Pipes, Heat Exchanger Tubes, and Condenser Tubes.

 

Copper Sheets, Plates:
Our flat-rolled products cover Copper Foils, Thin Sheets, Thick Plates, and Circles (Round Plates) in various tempers (O, H) for diverse applications.

 

Copper Bars, Rods & Profiles:
We offer Round Bars, Square Bars, Hexagonal Bars, and Flat Bars with excellent machinability and strength.

 

Copper Wires & Strips:
Our lineup includes high-conductivity Bare Copper Wires, Stranded Wires, and precisely manufactured Copper Strips.

 

Common Alloys & International Standards:

We master a wide array of materials compliant with ASTM, EN, JIS, and GB standards:

Pure Copper: C11000 (ETP Copper), C10200 (Oxygen-Free Copper), C12000 (DLP)

Brass Alloys: C26000 (Cartridge Brass), C27200 (Brass), C28000 (Muntz Metal)

Copper-Nickel: C70600 (CuNi90/10), C71500 (CuNi70/30)

Phosphor Bronze: C51900, C52100, C54400

Serving industries from HVAC/R and plumbing to electrical, automotive, and marine engineering, Gnee provides OEM support, competitive pricing, and reliable bulk supply for your global projects.

20250716165456

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