Electrolytic Tough Pitch (ETP)

Spec Equivalents: CDA 110 ETP, ASTM B124, ASTM B152, ASTM B187, ASTM B188, ASTM B272

The electrolytic tough pitch copper is the copper with high thermal and electrical conductivity. The products manufactured using this copper possess good corrosion resistance and soldering ability. The inherited fabrication qualities of the copper allows it to bend, drilled, soldered, riveted and to be fit in to almost any design specifications. This variant of copper has excellent hot workability.

-Electrical Industry
-Telecommunications Industry
-Architectural Industry
-Antimicrobial Applications

End Product Specification
Bands, Projectile Rotating MILITARY MIL-B-20292
Bar ASME SB133, ASTM B152, SAE J461, J463
Bar, Bus ASTM B187
Bar, Forging ASTM B124
Bolts ASTM F468
Brazing Filler Metal FEDERAL QQ-B-650
Foil, Printed Circuits ASTM B451
For, Forging ASTM B124
Forgings, Die ASTM B283
Nuts ASTM F467
Pipe, Bus ASTM B188
Plate AMS 4500, ASTM B152, SAE J461, J463
Rod ASME SB133, MILITARY MIL-C-12166, SAE J461, J463
Rod, Bus ASTM B187
Screws ASTM F468
Shapes SAE J461, J463
Shapes, Bus ASTM B187
Shapes, Forging ASTM B124
Sheet AMS 4500, ASTM B152, B694, SAE J463, J461
Sheet, Building Construction ASTM B370
Sheet, Clad ASTM B506
Sheet, Lead Coated ASTM B101
Sheet, Printed Circuits ASTM B451
Strip AMS 4500, ASTM B694, B152, SAE J463, J461
Strip, Building Construction ASTM B370
Strip, Clad ASTM B506
Strip, Printed Circuits ASTM B451
Studs ASTM F468
Tube, Bus ASTM B188
Tube, Welded ASTM B447
Wire, Coated With Lead Alloy ASTM B189
Wire, Coated With Nickel ASTM B355
Wire, Coated With Silver ASTM B298
Wire, Coated With Tin ASTM B246, B33
Wire, Flat AMS 4500, ASTM B272
Wire, Hard Drawn ASTM B1, FEDERAL QQ-W-343
Wire, Medium-Hard Drawn ASTM B2, FEDERAL QQ-W-343
Wire, Metallizing MILITARY MIL-W-6712
Wire, Soft ASTM B3, B738, B48, FEDERAL QQ-W-343, SAE J461, J463
Wire, Stranded ASTM B8, B496, B470, B286, B229, B226, B174, B173, B172, FEDERAL
Wire, Trolley ASTM B47, B116

Chemical Composition:

Cu O
Min/Max 99.90 min  
Nominals 0.04


Joining Technique Suitability
Brazing Good
Butt Weld Good
Capacity for Being Cold Worked Excellent
Capacity for Being Hot Formed Excellent
Coated Metal Arc Welding Not Recommended
Forgeability Rating 65
Gas Sheilded Arc Welding Fair
Machinability rating 20
Oxyacetylene Welding Not Recommended
Seam Weld Not Recommended
Soldering Excellent
Spot Weld Not Recommended

Physical Properties:

Product Property US Customary Metric
Coefficient of Thermal Expansion 9.4 · 10 6? per °F (68-212 F) 16.9 · 10 6? per °C (20-100 C)
Coefficient of Thermal Expansion 9.6 · 10 6? per °F (68-392 F) 17.3 · 10 6? per °C (20-200 C)
Coefficient of Thermal Expansion 9.8 · 10 6? per °F (68-572 F) 17.6 · 10 6? per °C (20-300 C)
Density 0.322 lb/in3 @ 68 F 8.91 gm/cm3 @ 20 C
Electrical Conductivity 101%IACS @ 68 F 0.591 MegaSiemens/cm @ 20 C
Electrical Resistivity 10.3 ohms-cmil/ft @ 68 F 1.71 microhm-cm @ 20 C
Melting Point Liquid US 1981 F 1083 C
Melting Point Solid US 1949 F 1065 C
Modulas of Elasticity in Tension 17000 ksi 117000 MPa
Modulas of Rigidity 6400 ksi 44130 MPa
Specific Gravity 8.91 8.91
Specific Heat Capacity 0.092 Btu/lb/°F at 68 F 393.5 J/kg · °K at 293 K
Thermal Conductivity 226.0 Btu · ft/(hr · Ft2 · °F)
at 68 F
391.1W/m · °K at 20 C

Sizes Available:

HOLLOW RODS Min Bore Size 20 mm and Max OD 100 mm
ROUND RODS 8mm To 100 mm
HEX 10mm To 60mm
SQUARE 10mm To 60mm
FLAT 10mm Min Thickness and max Width 120mm
BILLETS Up to 200 mm
INGOTS As per Specification

Electrolytic Tough Pitch (ETP)

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