Copper Brazing Rod Types

 

Copper Brazing Rod Types

Copper brazing rod is a filler metal used to join copper alloys. These brazing rods
usually have low melting point than the base metal. when heated it fits perfectly
inside the pipe bevel for strong holding. Most common copper brazing rod types are
used in this article we will compare its specification, physical properties,
chemical composition, and mechanical properties.

Brazing Materials Uses
Copper-phosphorous rods Mostly used in copper and copper alloy
Copper and copper-zinc It is used to join copper and copper alloy
Nickel rods Used for high heated places and corrosion resistence
Aluminium-silicon Used in pure aluminium or aluminium alloy
Silver Highly used for soldering

Copper Welding Rods Specification

MMA welding
Electrode diameter Amperage
5,0mm (3/16”) 150-225
4,0mm (5/32”) 130-180
3,2mm (1/8”) 90-160
2,4mm (3/32”) 50-110
TIG welding
Rod diameter Amperage 1 Amperage 2
5,0mm (3/16”) 280-330 200-320
3,0mm (1/8”) 170-230 225-320
1,6mm (1/16”) 70-120 70-150
2,4mm (3/32”) 120-160 140-230
4,0mm (5/32”) 220-280 175-300
MIG welding
Wire diameter Amperage Voltage
2,4mm (3/32”) 350-500 32-34
1,0mm (.045”) 100-250 22-28
0,9mm (.035”) 100-200 20-26
1,6mm (1/6”) 250-400 29-32

Copper To Copper Brazing Rods

Copper To Copper Brazing Rods

Designation Melting range in °C
DIN EN 1044 DIN EN ISO 3677 DIN EN ISO 17672 Solid Liquid
Copper-phosphorus brazing filler metals
CP 105 B-Cu92AgP645/825 CuP 279 645 825
CP 102 B-Cu80AgP645/800 CuP 284 645 800
CP 104 B-Cu89AgP645/815 CuP 281 645 815
Copper-based brazing filler metals
Cu 304*2 B-Cu60Zn(Sn)(Si) (Mn)- 870/890 B-Cu60Zn (Si)-875/895 870 900
Cu 301 B-Cu60Zn (Si)-875/895 Cu 470a 875 895
Copper-phosphorus brazing filler metals
CP 203 B-Cu94P710/890 CuP 179 710 890
CP 201 B-Cu92P710/770 CuP 182 710 770
CP 202 B-Cu93P710/820 CuP 180 710 820

Table Of Content

Specification Of Copper Brazing Rod

Specification Of Copper Brazing Rod

Standards BCuP-5 BCu-1 BCuP-3
ISO 3677 BCu80AgP 650-800 BCu99 1083 BCu89PAg 650-810
NFA 81-362 05B1 – 06B2
DIN EN1044 CP102 CU102 CP104
DIN:8513 L-Ag15P L-Cu L-Ag5P
BS:1845 CP1 – CP4
IS:2927 BaCuP-5 – BaCuP-4

Physical Properties Of Copper Brazing Rod

Properties Density
BCu-1 9.0 g/cm3 (560 lb/ft3)
BCuP-3 8.7 g/cm3 (540 lb/ft3)
BCuP-5 8.9 g/cm3 (550 lb/ft3)

Copper Brazing Rod HSN code

HSN Code Description
74071020 Other Copper Rods
7407 Copper Rods, Bars and Profile

Chemical Composition Copper Brazing Rod

Chemical Composition Copper Brazing Rod

Chemical Composition BCuP-3 BCu-1 BCuP-5
Copper (Cu) 88.5 to 89.4 99.9 to 100 79.2 to 80.7
Silver (Ag) 4.8 to 5.2 – 14.5 to 15.5
Phosphorus (P) 5.8 to 6.2 0 to 0.075 4.8 to 5.2
Aluminum (Al) – 0 to 0.010 –
Lead (Pb) – 0 to 0.020 –
Residuals 0 to 0.15 – 0 to 0.15

Copper Brazing Rod Mechanical Properties

Properties BCu-1 BCuP-3 BCuP-5
Shear Modulus 43GPa (6.3 x 106 psi) 40GPa (5.8 x 106 psi) 38GPa (5.6 x 106 psi)
Elongation at Break 15% – –
Elastic Modulus 120GPa (17 x 106 psi) 110GPa (15 x 106 psi) 100GPa (15 x 106 psi)
Poisson’s Ratio 0.34 0.34 0.34

Copper Brazing Rod Tensile Strength

Tensile Strength BCu-1 BCuP-3 BCuP-5
Yield (Proof) 130 MPa (18 x 103 psi) – –
Ultimate (UTS) 210 MPa (30 x 103 psi) 190 MPa (28 x 103 psi) 180 MPa (26 x 103 psi)

Thermal Properties Of Copper Brazing Rod

Thermal Properties Of Copper Brazing Rod

Properties BCuP-3 BCu-1 BCuP-5
Thermal Expansion 16µm/m-K 17µm/m-K 17µm/m-K
Specific Heat Capacity 400J/kg-K (0.1 BTU/lb-°F) 390J/kg-K (0.092 BTU/lb-°F) 380J/kg-K (0.091 BTU/lb-°F)
Latent Heat of Fusion 190J/g 210J/g 180J/g
Brazing Temperature 720 to 820°C (1320 to 1500 °F) 1090 to 1150°C (2000 to 2100 °F) 700 to 820°C (1300 to 1500 °F)
Maximum Temperature 200°C (390 °F) 200°C (390 °F) 200°C (390 °F)
Thermal Conductivity – 370W/m-K (210 BTU/h-ft-°F) –

Copper To Aluminum Brazing Rod

Copper To Aluminum Brazing Rod

Low Temp Brazing Rod For Copper

Copper To Aluminum Brazing Rod

Types Of Brazing Rods For HVAC

Types Of Brazing Rods For HVAC