ASTM B111 Seamless Copper and Copper-Alloy Condenser Tube
- Grade: UNS C44300, C68700, C70400, C70620, C71000, C71500, C71520
- Outside Diameter (OD) Range: 6-50.8mm
- Wall Thickness (WT) Range: 0.4-3mm
Features
ASTM B111/B111M Copper and Copper-Alloy Seamless Condenser Tube
Copper Alloy Condenser Tube Chemical Composition (wt.%)
| Alloy | Cu+Ag | Pb | Fe | Zn | Ni | Mn | Sn | Al | As |
| C44300 | 70.0-73.0 | 0.07 | 0.9-1.2 | Remainder | – | – | – | – | 0.02-0.06 |
| C68700 | 76.0-79.0 | 0.07 | 1.8-2.5 | Remainder | – | – | – | – | 0.02-0.06 |
| C70400 | Remainder | 0.05 | 1.3-1.7 | – | – | 1.0 max | – | 4.8-6.2 | – |
| C70620 | 86.5 min | 0.02 | 1.0-1.8 | – | 9.0-11.0 | 0.50 max | – | – | – |
| C71000 | Remainder | 0.05 | 0.50-1.0 | – | 19.0-23.0 | 1.0 max | – | – | – |
| C71500 | Remainder | 0.05 | 0.40-1.0 | – | 29.0-33.0 | 1.0 max | – | – | – |
| C71520 | 65.0 min | 0.02 | 0.40-1.0 | – | 29.0-33.0 | 0.50 max | – | – | – |
Copper Alloy Condenser Tube Mechanical Properties
- Tensile Strength (min, ksi): Depends on the temper and wall thickness. For example, C71500 in annealed (O61) temper has a tensile strength minimum of 50 ksi for wall thickness up to 0.048 in.
- Yield Strength (min, ksi): Similar dependency as tensile strength. C71500 in annealed (O61) temper has a yield strength minimum of 20 ksi.
- Elongation in 2 in. (min, %): Also depends on the specific alloy, temper, and dimensions. For annealed C71500, it’s typically around 30% for wall thickness up to 0.065 in.
Technical Specifications
| Specification | Value |
| Standard | ASTM B111/B111M Copper and Copper-Alloy Seamless Condenser Tube |
| Grade | UNS C44300, C68700, C70400, C70620, C71000, C71500, C71520 |
| Seam Type | Seamless |
| Type of Tube | U Tubes, Straight Tubes |
| Tube Size | Outside Diameter (OD) Range: 6-50.8mm, Wall Thickness (WT) Range: 0.4-3mm |
| Length | 6000-12000mm |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Chemical Analysis ASTM E255, Tensile Test ASTM E8/E8M, Grain Size ASTM E112, Expansion Test, Flattening Test, Residual Stress Test, NDE Test ASTM E243 (Hydrostatic/Eddy-Current/Pneumatic Tests) |
Packing
Packed in plywood boxes.
Application
Steam surface condensers: Copper-alloy tubes are extensively used in power plant condensers due to their high thermal conductivity and resistance to corrosion from cooling water.
Feedwater heaters: Copper-nickel alloys like C71500 (CuNi 70/30) offer excellent erosion resistance and are often used in feedwater heaters.
Multi-stage flash (MSF) evaporators and multi-effect distillation (MED) units: Copper-nickel alloys like C70600 (CuNi 90/10) and C71500 (CuNi 70/30) are commonly used due to their resistance to seawater corrosion and biofouling.
Heat exchangers and condensers: Various chemical processing applications use copper alloys with good resistance to specific chemicals.
Heat exchangers for shipboard systems: Copper-nickel alloys are preferred due to their excellent resistance to seawater corrosion and biofouling.
Chillers and condensers: Copper tubes are widely used in HVAC systems due to their high thermal conductivity and ease of fabrication.
Copper Alloys Commonly Used in Condenser Tubes:
C12200 (Copper): Offers excellent thermal conductivity but limited corrosion resistance.
C44300 (Admiralty Brass): Good general corrosion resistance and often used with inhibited cooling water.
C68700 (Aluminum Brass): Enhanced resistance to dezincification and impingement attack.
C70600 and C71500 (Copper-Nickel): Excellent resistance to seawater corrosion, biofouling, and erosion-corrosion.
