Key Features

Equivalent Specifications

UK
Def Stan 02-835 Issue 2(Class 1-4,Grade 1-2)
NES 780
Def Stan 02-729 (Non destructive testing)
DGS 357

US
DOD-C-24676
C72400

Applications

Specialist applications requiring the ability to withstand dynamic stresses and extreme environmental corrosion are most suitable for Def Stan 02-835 to be used. Much more cost effective than some of the highly processed nickel-based alloys, it is a low cost alternative material option that will last well in aggressive environments.

Marine Defence
Weapons handling equipment, sump block, high pressure marine actuation systems, components in sonar devices, hose couplings, gears, mechanical seals and washers, actuators, winch components, pump and propeller shafts.

Petrochemical
Subsea fasteners and bolting, shafts for pumps and valves, valve spindles, hydraulic pistons and cylinders, sub sea connectors. Process control equipment.

Tel +44 (0) 1782-816888  
Email sales@copperalloys.net
Print this page »

Def Stan 02-835 High Strength Cupro Nickel

High Strength Cupro Nickel
CuNi15Mn4Al1Fe
Elite Alloy CAL T-850

A naturally anti bio-fouling UK Defence Standard High Strength Cupro Nickel which has unique excellent corrosion resistance with general corrosion rates of <0.025mm/year, does not suffer from hydrogen embrittlement, has excellent anti-galling properties, has good resistance to erosion corrosion and is almost insensitive to stress corrosion.

Def Stan 02-835 retains its strength well at moderately elevated temperatures, has good hot-working properties and is readily weldable. Def Stan 02-835 can also be used in cryogenic applications down to -196ºc with no loss in impact strength. The most commonly used wrought forms are individual forgings, and long products such as rod and bar.

This wrought high strength cupro nickel alloy has a higher tensile strength and impact strength than nickel aluminium bronze and has a proven track record having been incorporated in to various submarine build programs for many decades. It is galvanically compatible with other copper alloys and stainless steel. Def Stan 02-835 is also being used for wider applications in a variety of industries around the world, predominantly within commercial marine and petrochemical industries, which benefit from the attractive blend of physical and mechanical properties.

Composition

ElementCuNiMnFeAlCrImpurities
%Bal13.5-16.53.5-5.50.7-1.21-20.5 Max0.3 Max

Typical Mechanical Properties

FormCross sectional area
Metric mm		Yield 0.2% MPa UTS
MPa 		Elong % Izod (Joules)
Rod >>15-125 430-600 725-770 18-23 40-70
Rod >125 400-500 710-740 18-25 40-80
Forgings All sizes 400-500 710-740 18-24 40-76

Copper Alloys Manufacturing Ranges

With very little limitation on size, Def Stan 02-835 is available as standard in rod, bar, blocks, rings, tubes and discs up to a piece weight of 4,500kg/9,900lbs.

Copper Alloys is also regularly making customised shaped forgings and can increase piece weight up to 20,000kg/44,000lbs.

Copper Alloys Ltd also offers finished machined components in all alloys, complete project management and tailored mechanical properties beyond those of the specification to meet special requirements.

All information is supplied for guidance only and gives no guarantee for end applications

Typical Physical Properties

(Courtesy Def Stan 02-879)
Metric
Density 8500 kg/m³
Specific Gravity 8.5
Specific Heat 435J/kg K
Electrical Conductivity 5% IACS 2.85mΩ/mm² @ 20ºC
Thermal Conductivity 25 W/mK
Thermal Linear Expansion 16 µstain/K Range (20-200 ºC)
Electrical Resistivity 0.35 µ Ωm
Relative Magnetic Permeability <1.01 µ
Machining Index 20% (Based on free machining brass 100%)
Modulus of Rigidity 52 GPa
Modulus of Elasticity (In Tension) 145 GPa
Fatigue Limit in air (rotating) 108 cycles +/- 230 MPa
Melting Range 1030-1090 ºC
Hot Working 850-1000ºC
Cold Working fair
Cryogenic Retains properties down to -169 ºC
Elevated Temperatures Retains properties to 350 ºC

Optimised material production

  1. Precision machining - Copper Alloys Ltd. has a deep understanding of machining in all of its alloys. Buying components direct from the material producer will be cost effective and risk-free for the customer.
  2. Project management is available for full ranges of kit and components. Harnessing the Copper Alloys quality management system guarantees delivery on-time and in full.
  3. Tailored and customised properties (physical and mechanical) beyond those of the specification to meet special requirements

Joining

(BS EN 150 156114-G (welding specification) ) Recommended Welding Processes
  1. Tungsten inert gas (TIG) or gas tungsten arc(GTAW)
  2. Metal inert gas (MIG) or gas metal arc (GMAW)
  3. Manual arc (MMA)
  4. Friction welding
  5. Laser welding

Copper Alloys Ltd has the ability to modify existing alloys for improved performance. Many customers have benefited from this in the past.

To discuss your requirements, call a member of Copper Alloys Ltd's technical team on +44 (0) 1782-816888, or email sales@copperalloys.net.

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with tempeter, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be acepted by the Company in respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the Company's Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions, a copy of which is available on request.