ASTM B111 / ASME SB111 UNS C71520 Copper Nickel Alloy Seamless Tube Condenser Tube
ASTM B111 / ASME SB111 UNS C71520 (Cu-Ni 70/30) Seamless Copper Nickel Alloy Tube
Cu-Ni alloys are alloys of copper (base metal with the largest individual content) and nickel with or without other elements, whereby the zinc content may not be more than 1%. When other elements are present, nickel has the largest individual content after copper, compared with each other element. As with other copper alloys, it is necessary to distinguish between wrought alloys, which are processed to semi-finished products, and cast alloys, from which castings are produced by various casting processes. The Cu-Ni alloys with additions of manganese are important in electrical engineering. Additions of iron significantly improve the resistance of Cu-Ni alloys to erosion corrosion in flowing seawater and other aggressive waters.
| Form | Specific Sub-Form | System | Standard | Description |
|---|---|---|---|---|
| Bar | ASTM | B151/B151M | COPPER-NICKEL-ZINC ALLOY (NICKEL-SILVER) AND COPPER-NICKEL ROD AND BAR | |
| Condenser & Heat Exchanger Tube with Integral Fins | ASTM | B956/B956M | WELDED COPPER AND COPPER-ALLOY CONDENSER AND HEAT EXCHANGER TUBES WITH INTEGRAL FINS | |
| Heat Exchanger Tube | ASTM | B543/B543M | WELDED COPPER AND COPPER ALLOY HEAT EXCHANGER TUBE | |
| Pipe | ASTM | B466/B466M | SEAMLESS COPPER-NICKEL PIPE AND TUBE | |
| Welded | ASTM | B608 | WELDED COPPER ALLOY PIPE | |
| Welded | ASTM | B467 | WELDED COPPER-NICKEL PIPE | |
| Plate | ASTM | B171/B171M | COPPER ALLOY CONDENSER TUBE PLATES | |
| Rod | ASTM | B151/B151M | COPPER-NICKEL-ZINC ALLOY (NICKEL-SILVER) AND COPPER-NICKEL ROD AND BAR | |
| Rod, Bar & Shapes | ASTM | B124/B124M | COPPER AND COPPER-ALLOY FORGING ROD, BAR AND SHAPES | |
| Sheet, Strip, Roller Bar & Plate | ASTM | B122/B122M | COPPER-NICKEL-ZINC ALLOY (NICKEL-SILVER) AND COPPER-NICKEL PLATE, SHEET, STRIP, AND ROLLED BAR | |
| Tube | ASTM | B395/B395M | U-BEND SEAMLESS COPPER AND COPPER ALLOY HEAT EXCHANGER AND CONDENSER TUBES | |
| Welded | ASTM | B552 | SEAMLESS AND WELDED COPPER-NICKEL TUBES FOR WATER DESALTING PLANTS | |
| ASTM | B359/B359M | COPPER AND COPPER-ALLOY SEAMLESS CONDENSER AND HEAT EXCHANGER TUBES WITH INTEGRAL FINS | ||
| ASTM | B466/B466M | SEAMLESS COPPER-NICKEL PIPE AND TUBE | ||
| ASTM | B111/B111M | COPPER AND COPPER ALLOY SEAMLESS CONDENSER TUBES AND FERRULE STOCK |
| Trade Name | UNS | Copper Nickel Industry Specifications | Chemical Composition | Min.Tensile (KSI) |
Min.Yield (KSI) |
Elongation % |
|---|---|---|---|---|---|---|
| CuNi 70/30 | UNS C71500 UNS C71520 |
ASME SB111, SB171, SB359, SB395, SB466, SB467, SB543 ASTM B111, B122, B151, B171, B359, B395, B432, B467, B543, B552, B608, F467, F468 DIN 2.0882 MIL C-15726, T-15005, T-16420, T-22214 SAE J461, J463 |
Cu(65.0 min) Pb .05 max* Fe 0.4-1.0 Zn 1 max* Ni 29-33 Mn 1 max |
52 | 18 | 45 |
| Elements | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cu(1,2) | Pb | Zn | Fe | P | Ni(3) | C | Mn | S | |
| (1) Cu value includes Ag. (2) Cu + Sum of Named Elements 99.5% min. (3) Ni value includes Co. |
|||||||||
| Min (%) | 65.0 | 0.40 | 29.0 | ||||||
| Max (%) | 0.02 | 0.50 | 1.0 | 0.02 | 33.0 | 0.05 | 1.0 | 0.02 | |
| Form | Temper | Temper Code | Tensile Strength (ksi) |
YS-0.2% Offset (ksi) |
Elongation (%) |
Section Size (in) |
|---|---|---|---|---|---|---|
| * Measured at room temperature, 68°F (20°C). | ||||||
| Flat Products | As Hot Forged - Air Cooled | M10 | 50 Min | 20 Min | 30 Min | 6 |
| As Hot Forged - Air Cooled | M10 | 45 Min | 18 Min | 30 Min | ||
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