The NFA 51 102 aluminium brass pipes are made from CuZn22Al2 alloy which is a type of copper alloy intended for use in heat exchangers and condensers. As per the French standard, this particular grade of alloy consists of seamless copper alloy tubes having high resistance to corrosion caused by seawater, impingement, and dezincification. It contains roughly 2% aluminium in addition to zinc with traces of arsenic. AFNOR has cancelled NF A 51-102; the same alloy is now ordered as EN 12451 CuZn20Al2As. Amardeep Steel manufactures and supplies NFA 51 102 aluminium brass pipes in different dimensions, offering material quality and dimensional consistency for industrial requirements.
Specifications of NFA 51 102 Aluminium Brass Pipe
Parameter | Specification |
|---|---|
Standard | NF A 51-102 (Former French standard); supplied to EN 12451 CuZn20Al2As or ASTM B111 C68700 equivalents |
Grade | CuZn22Al2 aluminium brass |
Manufacturing Type | Seamless, cold-drawn round tube |
Outside Diameter (OD) | 6 mm to 108 mm |
Wall Thickness | 0.5 mm to 3.0 mm |
Length Options | Straight lengths up to 15 m, custom cut lengths, or formed U-bends |
Condition / Temper | Annealed condition; custom tempers available on request |
Quality & Testing | Non-destructive eddy current or hydrostatic testing, flattening test, drift expansion test, residual stress test, grain size measurement |
Certifications | EN 10204 3.1 mill test certificates; EN 10204 3.2 third-party inspection available on request |
Chemical Composition of NFA 51 102 Aluminium Brass Pipe
Element | NFA 51-102 CuZn22Al2 (%) | Nominal Composition (%) |
|---|---|---|
Copper (Cu) | 76.0 to 79.0 | 77.5 |
Aluminium (Al) | 1.8 to 2.5 | 2.0 |
Arsenic (As) | 0.02 to 0.06 | 0.04 |
Lead (Pb), max | 0.07 | — |
Iron (Fe), max | 0.06 | — |
Zinc (Zn) | Remainder | 20.5 |
Total Impurities, max | 0.3 | — |
Mechanical Properties of NFA 51 102 Aluminium Brass Pipe
Property | Value | Basis |
|---|---|---|
Hardness | 80 to 130 HV5 | NF A 51-102 CuZn22Al2 standard |
Grain Size | 0.010 to 0.045 mm | NF A 51-102 standard range |
Tensile Strength, min | 345 MPa (50 ksi) | ASTM B111 C68700, O61 annealed equivalent |
Yield Strength, min | 125 MPa (18 ksi) | ASTM B111 C68700, O61 annealed equivalent |
NFA 51 102 Aluminium Brass Pipe Physical Properties
Property | Value |
|---|---|
Density | 8.33 g/cm³ (0.301 lb/in³) |
Thermal Conductivity (20°C) | 100 W/m·K |
Electrical Conductivity | 23% IACS |
Applications and Industrial Uses of NFA 51 102 Aluminium Brass Pipe
- Steam Surface Condensers
- Thermal Power Plant Cooling Systems
- Seawater Desalination Plants
- Marine Heat Exchangers
- Shipboard Condensers
- Petrochemical Heat Exchangers
- Industrial Seawater Cooling Systems
- Coastal Industrial Cooling Plants
Frequently Asked Questions
1. What is NFA 51 102 aluminium brass pipe?
NFA 51 102 aluminium brass pipe is a seamless copper alloy tube made from CuZn22Al2, designed for heat exchangers, condensers, and seawater cooling systems.
2. Is NFA 51 102 equivalent to ASTM B111 C68700?
NFA 51 102 CuZn22Al2 and ASTM B111 C68700 are closely related aluminium brass grades. However, their chemical composition and mechanical requirements should be checked before considering them interchangeable.
3. What is the difference between NFA 51 102 and EN 12451?
NF A 51-102 is a cancelled French standard, while EN 12451 is the current European standard that replaced it. Under EN 12451, the corresponding aluminium brass alloy is designated CuZn20Al2As (CW702R).
4. Are NFA 51 102 aluminium brass pipes suitable for seawater applications?
Yes, these pipes offer good resistance to seawater corrosion and impingement attack, making them suitable for marine condensers, heat exchangers, and cooling systems.
5. Are NFA 51 102 aluminium brass pipes seamless?
Yes, NF A 51-102 specifies seamless round copper alloy tubes manufactured for heat exchangers and condenser applications.
6. What should I order to replace NF A 51-102 aluminium brass tube?
Usually, EN 12451 CuZn20Al2As or ASTM B111 C68700 can be considered, provided the drawing allows the substitution. Match the original outside diameter, wall thickness, and material condition.
7. What is the hardness of NFA 51 102 aluminium brass?
NF A 51-102 specifies a hardness range of 80–130 HV5 for CuZn22Al2 tubes, with a grain size of 0.010–0.045 mm.
