• Dali Electronics

ALLOY GRADE - CuZr

  • Specification: C15000
  • Composition:  Zr 0.1 – 0.2%, Others: 0.1% Max., Balance: Cu
  • Hardness HRB: >48
  • Tensile Strength N/mm2: >240
  • Electrical Conductivity % (IACS): >90%
  • Elongation in %: >10%
  • Electrical Application: Traction Motor, Resistance Welding Electrodes, Switches, Commutators.
  • Industrial Application: Seam Welding Wheels, Connectors, Resistance Welding Electrodes.
  • Forms Available: Short Circuit Rings & Rotor Bars, Billets, Rods, Bars, Profiles, Wheels.

ALLOY GRADE - CuCr

  • Specification : C18200
  • Composition: Cr 0.6 – 1.2%, Others: 0.7% Max. Balance: Cu
  • Hardness HRB >65
  • Tensile Strength N/mm2: >360
  • Electrical Conductivity % (IACS): >78%
  • Elongation in %: >10%
  • Electrical Application: Traction Motor, Electrical Conductors Requiring Greater, Strength than Copper, Electron Tube, Grid Side Rods, Wire, High Temperature, Contacts, Switchgears, Electric Motor and Generator Components, Electrical Connectors, Connectors, Cable, Semi Conductor Bases, Parts for Electronic Devices, Switch Contacts, Arcing and Bridging Parts, Thermal Conductors Requiring Greater Strength than Copper, Circuit Breaker Parts.
  • Industrial Application: Wear Plates on Heavy Equipment, Heat Sinks, Current Carrying Shafts and Arms, Plastic Mold Components, Structural Parts, Spot Welding Tips, Flash Welding Electrodes, Molds, Flash Welding Electrodes, Electrode Holder Jaws, Resistance Welding Machine Electrodes, Seam Welding Wheels.
  • Forms Available: Short Circuit Rings & Rotor Bars, Billets, Rods, Bars, Profiles, Wheels, Casting.

ALLOY GRADE - CuCrZr

  • Specification : C18150
  • Composition: Cr 0.5 – 1.5%, Zr 0.03 – 0.30%, Other 0.3% Max., Balance: Cu
  • Hardness HRB: >65
  • Tensile Strength N/mm2: >360
  • Electrical Conductivity % (IACS): >78%
  • Elongation in %: >10%
  • Electrical Application: Traction Motor, Resistance Welding Electrodes, Electrical Conductors Requiring Greater Strength than Copper, Electron Tube, Grid Side Rods, Wire, High Temperature, Contacts, Switchgears, Electric Motor and Generator Components, Electrical Connectors, Connectors, Cable, Semi Conductor Bases, Parts for Electronic Devices, Switch Contacts, Arcing and Bridging Parts, Thermal Conductors Requiring Greater Strength than Copper, Circuit Breaker Parts.
  • Industrial Application: Wear Plates on Heavy Equipment, Heat Sinks, Current Carrying Shafts and Arms, Plastic Mold Components, Structural Parts, Spot Welding Tips, Flash Welding Electrodes, Molds, Flash Welding Electrodes, Electrode Holder Jaws, Resistance Welding Machine Parts, Seam Welding Wheels, Welding Electrodes, Tip and Rod Extensions.
  • Forms Available: Short Circuit Rings & Rotor Bars, Billets, Roads, Bars, Profiles, Wheels, Casting.

C17500 - COBALT BERYLLIUM COPPER

Physical PropertiesMetricEnglishComments
Density 8.75 g/cc0.316 lb/in³
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 92 – 10092 – 100
Tensile Strength, Ultimate 690 – 825 MPa100000 – 120000 psi
Tensile Strength, Yield 550 – 690 MPa @Strain 0.200 %79800 – 100000 psi @Strain 0.200 %
Elongation at Break 10 – 20 %10 – 20 %
Modulus of Elasticity 125 – 130 GPa18100 – 18900 ksi
Fatigue Strength 205 MPa, 275 – 310 MPa29700 psi, 39900 – 45000 psiStrip, Rod
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000028735 – 0.000003831333 ohm-cm @Temperature 20.0 °C0.0000028735 – 0.000003831333 ohm-cm @Temperature 68.0 °F
Thermal PropertiesMetricEnglishComments
CTE, linear 17.6 µm/m-°C @Temperature 20.0 – 200 °C9.78 µin/in-°F @Temperature 68.0 – 392 °F
Specific Heat Capacity 0.420 J/g-°C0.100 BTU/lb-°F
Melting Point 1030 – 1070 °C1890 – 1960 °F
Solidus 1030 °C1890 °F
Liquidus 1070 °C1960 °F
Processing PropertiesMetric EnglishComments
Processing Temperature 980 °C1800 °FHot-Shortness Temperature
Solution Temperature 900 – 925 °C, 900 – 955 °C1650 – 1700 °F, 1650 – 1750 °FLarge sections, 1 hour per inch or fraction of an inch
Aging Temperature 425 °C, 470 – 495 °C797 °F, 878 – 923 °F3-6 hours, for maximum strength, Commercial practice, 2-3 hours
Hot-Working Temperature 700 – 925 °C1290 – 1700 °F
Chemical CompositionMetricEnglishComments
Beryllium, Be 0.40 – 0.70 %0.40 – 0.70 %
Cobalt, Co 2.4 – 2.7 %2.4 – 2.7 %
Copper, Cu 96.90%96.90%
Iron, Fe >= 0.10 %>= 0.10 %
Other >= 0.50 %>= 0.50 %

C17510 - BERYLLIUM COPPER ALLOY

Copper (incl. Silver)IronNickelCobaltSiliconBerylliumAluminum
97.8 Nominal.10 Maximum1.4 Minimum.30 Maximum.20 Maximum.20 Minimum.20 Maximum

Precipitation hardened alloy with good thermal conductivity and high hardness. Not suitable for case hardening or nitrating.

Hardware: Fuse clips, fasteners, springs, switch parts, relay parts, electrical conductors.

Industrial: Welding equipment.

Typical for rod in HT temper

Hardness*Rockwell B Scales98
Tensile Strength**KSI115
Yield Strength**KSI110
Elongation**% in 2 inch14
  • Hardness conversions are approximate
  • Test values are nominal approximations and depend on specimen size and orientation.
  • Cold worked and precipitation hardened condition
  • Volume basis
Thermal ConductivityBTU/ (sq ft-ft-hr-F)120-150
Specific HeatBTU/lb/ºF @ 68F.10
Thermal ExpansionPer °F from 68 F to 392 F.0000098
Densitylb/cu in @ 68 F .317
Electrical Conductivity* (Annealed)**% IACS @ 68 F45-48
Modulus of ElasticityKSI19,000
Capacity for being cold workedExcellent
Capacity for being hot formedGood
Hot forgeability rating (forging brass=100)
Hot working temperature1200-1625 F or 650-765 C
Machinability rating (Free Cutting Brass=100)
Solution heat treating temperature1675-1725 F or 900-950 C
Suitability for being joined by:Soldering/Good,
Brazing/Good,
Oxyacetylene Welding/Not Recommended,
Gas Shielded Arc Welding/Fair,
Coated Metal Arc Welding/Fair
Resistance WeldingSpot/Good, Seam/Fair, Butt/Fair

CCNB MATERIAL SPECIFICATION

Material DesignationCCNB
Material Designation, EN standardCuCo1NiBe
Material No., EN StandardCW103C
Material no., former DIN standardNone. Comparable to 2.1285 (CuCo2be)
Material No., UNS system (ASTM)None. Comparable to C17500 (CuCo2be)
Classification RWMA (USA)Class 3
Information about standards
ENEN12163 bars), EN12167 (Flat bar, profiles), EN12420 (Forged products)
DIN(former)(DIN17666/DIN17672)
ASTM (B441. B534)

Description of material

CCNB is thermally precipitation hardenable copper alloy. In heat treated condition, the alloy combines high hardness and high resistance to heat with good electrical and thermal conductivity.
The technological properties are improved by replacing part of the cobalt according to former DIC standard CuCo2Be (2.1285) by nickel.

Material Properties

Chemical Composition in % of weight (guaranteed ranges)

CoNiBeFeSiothers totalCu
0.8-1.30.8-1.30.4-0.7max. 0.2max. 0.20.5Remainder

Agreed properties at 20°C (Condition: hardened, solution heat treated respectively)

ConditionHardenedSolution heat treated
Hardness Brinell HBmin. 220 *)max. 110 *)
Electrical Conductivity mS/mmin. 25max. 13
Electrical Conductivity% IACSmin. 43.0max. 22.5

Associated properties at 20°C (Condition: hardened, solution heat treated respectively)

ConditionHardenedSolution heat treated
Tensile Strength1)N/mm2(Mpa)min. 680max. 500
0.2% yield strength 1) N/mm2(Mpa)min. 550max. 400
Elongation%min. 8max. 25

Material information (nominal values)

Elastic modulusN/mm2(Mpa)135,000
Softening temperature °C480
Specific weightg/cm38.85
Thermal ConductivityW/mK230-250(Average 20°C-300°C)
Thermal expansion coefficientx 10-6/°K17.2(Average 20°C-300°C)
Melting interval°C1000-1030

Hot  forming

CCNB is suitable for hot forming at temperatures of about 900-700°C. After forming, quick cooling in water is recommended.

Advice: after a hot forming executed by the customer, the properties of CCNB will normally no longer be achieved.

Cold forming

CCNB in hardened condition is not intended for cold forming. In case, a cold forming has to be executed, CCNB in solution heat treated condition has to be used. After forming, as a rule, the part has to be heat treated.

Heat treatment

A heat treatment changes the agreed properties. If a heat treatment is executed after supply of the material, we cannot guarantee any properties.

Advice for heat treatment (they always depend to a large degree on the kind and the function of the furnace)

Solution heat treatment: 920-970°C, about 30 minutes followed by quenching in water

Hardening: 460-520°C, 2-5 h followed by cooling at the air

Machining

CCNB is very suitable for machining. We recommend hard metal cutting tools with positive cutting geometry.

For drilling, attention must be paid to good removal of chips. Cooling with emulsion is recommended. In case of dry machining, this has to be done with strong suction. Outgoing air has to be cleaned by a particle filter.

Thread moulding is possible to a limited extent. Bigger inside threads should be executed by circular thread milling.

Joining

CCNB is suitable for soft as well as hard soldering. Concerning hard soldering (even at limited time of effect of the temperature), a loss in hardness in the area of heating is to be expected. A very low melting silver brazing should be used. CCNB is suited for welding. Attention must be paid to sufficient extraction and filtering of welding fume.

Application examples

Electrodes, holders, shafts for spot, seam, butt and projection welding of (preferably) materials of higher strength and greater electrical resistance (e.g. stainless and heat-resistant steels), welded wire mesh.

Moulds for non -ferrous metal casting, inserts in steel molds at spots requiring a faster cooling speed.

Die casting pistons for horizontal cold chamber casting machines for light metal casting.

Thermally highly strained parts susceptible to fire cracks.