NFA 51 102 admiralty brass pipe, which is identified in France as CuZn29Sn1, is a copper zinc alloy that utilizes a small amount of tin to prevent dezincification. NFA 51 102 admiralty brass pipe can be relied upon in situations where ordinary brass pipes do not work well, which is one reason that it is still a popular option for piping which is always in touch with moisture, brine, or condensing steam. Customers who operate according to the French NFA standard usually look for NFA 51 102 admiralty brass pipe because they know that this type of pipe has predetermined chemistry, hardness range and grain size.
USA Piping Solution manufactures and supplies NFA 51 102 admiralty brass pipe in custom sizes, with dispatch from the United States and full mill test documentation on every order.
NFA 51 102 Admiralty Brass Pipe Cross Standard Equivalent Specifications
| Specification | Details |
|---|---|
| Product Name | NF A51-102 Admiralty Brass Pipe / Tube |
| Material | Admiralty Brass |
| French Standard | NF A51-102 |
| Alloy Designation | CuZn29Sn1 |
| Material Type | Copper-Zinc-Tin Alloy |
| Typical Alloy Family | 70/30 Admiralty Brass |
| Total Impurities | 0.30% max. |
| Product Form | Seamless round tube / pipe |
| Typical Condition | Annealed / as specified by purchase requirement |
| Hardness – Annealed | Approx. 80–120 HV5* |
| Grain Size | 0.010–0.045 mm* |
| Typical Tensile Strength | Grade/temper dependent; do not state a single value without specifying delivery condition |
| Typical Yield Strength | Grade/temper dependent; do not state a single value without specifying delivery condition |
| Typical Applications | Heat exchangers, condensers, evaporators, coolers, distillation equipment and desalination equipment |
| Surface Finish | Smooth, clean and free from defects that could affect service performance |
| Manufacturing | Seamless tube |
| Testing / Inspection | Chemical analysis, mechanical testing, dimensional inspection and applicable tube integrity/non-destructive testing |
| Current European Replacement | NF EN 12451 – Seamless, round tubes for heat exchangers |
Industrial Applications of NFA 51 102 Admiralty Brass Pipe
NFA 51 102 Admiralty Brass Pipe is commonly selected for applications requiring good corrosion resistance, heat transfer, and reliable performance in water and marine environments. Typical uses include:
- Condenser and heat exchanger tubes
- Steam condenser and cooling systems
- Marine seawater piping and equipment
- Desalination and water-treatment plants
- Power generation cooling systems
- Shipbuilding and marine machinery
Frequently Asked Questions
What does the NFA 51 102 standard designate for admiralty brass?
NFA 51 102 is the French national standard reference for admiralty brass with the composition CuZn29Sn1. When someone asks for NFA 51 102 admiralty brass pipe they are asking for tube produced to this specific French chemistry and property specification, as opposed to the American, British, German, or Japanese equivalents of the same base alloy.
Is NFA 51 102 CuZn29Sn1 the same as ASTM C44300?
NFA 51 102 CuZn29Sn1 and ASTM C44300 are treated as equivalent by most engineers, since both describe admiralty brass with a very close chemistry and property range. NFA 51 102 admiralty brass pipe can generally be substituted for C44300 material unless a project specifically calls out French certification.
What is the difference between NFA 51 102 admiralty brass and NFA 51 102 Aluminum Brass?
NFA 51 102 Admiralty brass pipe is CuZn29Sn1, strengthened with tin, while NFA 51 102 aluminium brass is a separate alloy, CuZn20Al2 or CuZn22Al2, strengthened with aluminium instead. Both share the same French standard number, which causes confusion, but they are chemically distinct materials suited to different service conditions.
Should I choose annealed or hard condition for my application?
Choose annealed condition NFA 51 102 admiralty brass pipe when the tube will be bent, coiled or expanded into a tube sheet, since annealed material offers much higher elongation. Choose hard condition NFA 51 102 admiralty brass pipe when the tube will remain straight in service and higher tensile strength is the priority.
Request a Quote
Need NFA 51 102 Admiralty Brass Pipe? USA Piping Solution can supply it in annealed or hard condition and cut to your required length. Contact us today for a quote or explore our complete range of copper, brass, and bronze alloys.
Other Products
Admiralty brass tubes, admiralty brass fin tube, copper nickel pipes and tubes, and naval brass plates,