QQ-N-286 - Copper Alloys

Based on the Unified Numbering System material N05500, the US Federal Material Specification of QQ-N-286 is a hardenable, high strength, corrosion resistant nickel-based alloy widely used in naval and subsea applications.

The world-leading material excels in performing to an extreme standard in demanding environments. In marine defence environments, QQ-N-286 is commonly used on submarine bodies, fasteners, bolting, pumps, valves, connectors and penetrators.

Copper Alloys can form its wrought nickel-copper aluminium alloy QQ-N-286-G material into a number of different formats from rods to bars and rings to plates. Understanding the different exacting requirements of a project, the team of expert metallurgists can alter the properties to suit different metals used in different end environments.

Typically created with the nominal composition of NiCu30Al, QQ-N-286 is a wrought copper-nickel which outperforms many other Federal Specifications.

Why choose Copper Alloys?

Industry leading six-month lead time.

Thorough testing process.

NNS approval for submarine forgings.

General Dynamics, Electric Boat approved.

Experience working with global navies.

What is federal specification QQ-N-286-F?

The -F in QQ-N-286-F refers to an older version of a federal specification. Referring to a previous version, the newer -G specifications will feature a different range of characteristics.

What is federal specification QQ-N-286-G?

This -G version of QQ-N-286 is the most up-to-date revision. Active as of December 2000, the G version of QQ-N-286 requires a slow strain rate test to measure the tensile strength.

Equivalent Specifications

As well as adhering to the QQ-N-286 US Federal specification, the material also goes beyond the required characteristics of the following specifications:

ASTM B 865 N05500
DIN 2.4375 NiCu30Al
DIN 17743
DIN 17752 & DIN 17754
AMS 4676
QQN -N-286
BS 3074 NA18
BS 3072 NA18
BS 3076 NA18
AFNOR NU30AT

Key Features

The wrought nickel-copper aluminium created by Copper Alloys has additions of iron, manganese and titanium which helps to produce a range of various properties from increased strength to corrosion resistance.

The alloy has an unrivalled resistance to corrosion, high quality strength capacity and good weldability for use in components of all sizes.

QQ-N-286 is also resistant to corrosion in hydrochloric and hydrofluoric acid in non-aerated conditions.

Typical Mechanical Properties of QQ-N-286-G

Tensile Strength (N/mm²)	1050
Impact Izod J20°C(N/mm²)	70
Proof/Yield Strength (N/mm²)	676
Elongation (%)	25

Typical Physical Properties of QQ-N-286-G

Density g/cm³	8.44
Melting Temperature Range °C	1315 – 1350
Thermal Conductivity W/mK	17.2
Electrical Resistivity μΩ.m15°C	61.5
Coefficient of Thermal Expansion 0-250°C	14.9
Relative Magnetic Permeability	<1.01