Copper rectangular bars

Copper bars are semi-finished products obtained by hot pressing and cold drawing, having:

a) Cu-ETP – high electrical and thermal conductivity and excellent plastic deformation properties. For this type of copper special precautions are required when heat treating, welding or brazing in a hydrogen atmosphere to prevent hydrogen embrittlement.
b) Cu-DHP – has excellent welding, bonding and plastic deformation properties both hot and cold.

COMMON AREAS OF USE FOR ROUND COPPER BARS:

in electrotechnical applications,
being the basic semi-finished product in the production of transformer substations and electrical panels,
power distribution systems, wind energy,
in electrical machine construction,
design and architecture.

ALLOYS COMMONLY USED IN WIDE AND SQUARE COPPER BARS

Execution standard

EN 12167	Copper and copper alloys - profiles and rectangular bars	Cu-DHP	Drawn and extruded bars
EN 13601	Copper and copper alloys - bars for electrotechnical applications	Cu-ETP	Drawn and extruded bars

Chemical composition

ALLOY	EURONORM NO	Cu%	Sn%	P%	Ag%	O%
Cu-ETP	CW004A	99,90	-	-	0,0025	0,040
Cu-DHP	CW024A	99,90	-	0,015 - 0,040	0,0025	-

Physical properties

ALLOY	EURONORM NO	DENSITY, G/CM³	ELECTRICAL CONDUCTIVITY		THERMAL CONDUCTIVITY	MODULUS OF ELASTICITY
ALLOY	EURONORM NO	DENSITY, G/CM³	MS/m	%IACS	W/mK	kN/m²
Cu-ETP	CW004A	8,94	58	100	390	127
Cu-DHP	CW024A	8,94	46	79	340	132

Mechanical properties

EUROPEAN STANDARD			GERMAN STANDARD
	EN 12167	EN 13601	DIN 40500	DIN 17672
DELIVERY CONDITION	Cu-DHP	Cu-ETP	E-Cu57	SF-Cu
EXTRUDED	M		p
DRAWN (WITHOUT MEASUREMENT OF MECHANICAL PROPERTIES)	M	D	zh	zh
SOFT		R200 H035	F20	F20- F22
½ HARD	R240/ H065	R230 - R250 H065	F25	F24
HARD	R280 H085	R260 - R300 H075 - H085	F30	F29