Electrotechnical round copper wire (hereinafter referred to as Wire) is used to manufacture wire strands and for other electrical applications as well. The following types of Wire are available:

МТ - hard copper Wire	МТЭ - hard copper Wire for enameling.
MM - soft copper Wire

Wire nominal diameters are given in the Table:

Nominal diameter, mm	Extreme deviation, mm		Nominal diameter, mm	Extreme deviation, mm
	Maximum nominal diameter deviation, (+)	Maximum nominal diameter deviation, (-)		Maximum nominal diameter deviation , (+)	Maximum nominal diameter deviation (-)
МТЭ
Over1,000 to 1,120	0,011	0,005	Over1,500 to 1,600	0,016	0,010
Over1,120 to 1,180	0,012	0,006	Over1,600 to 1,700	0,017	0,010
Over1,180 to 1,320	0,013	0,006	Over1,700 to 1,800	0,018	0,010
Over1,320 to 1,400	0,014	0,006	Over1,800 to 1,900	0,019	0,010
Over1,400 to 1,500	0,015	0,006	Over1,900 to 2,700	0,020	0,010
МТ, MM
Over 1,00 to 2,7	0,020	0,020

Wire ovality must not exceed diameter extreme deviations. Wire surface is smooth, no scratches, hairlines, handling marks as well as process-induced defects exceeding diameter limit - are permitted.

Wire must not have any splicing; it is supplied on metal reels.

Tensile strength value is not less than 422 MPа for 1.7 mm Wire and not less than 400 MPа for over1.7 mm Wire. МТ Wire must stand bending test and МТЭ Wire winding one correspondingly. Relative lengthening of the wire of the mark MM not less 30 %.

Wire direct current specific resistance recalculated as for 20 °С must not exceed 0.0178*10^-6 Om*m (diameter 2.44 mm) and 0,0177*10^-6  Om*m (diameter over 2.44 mm).

Manufacturer guarantees Wire general properties owing to stability of the Wire drawing-process and strict control of the chemical composition of raw material (copper drawing billet, brand MKLB, grade 1 and 2 as per TU 1733-005-05774969-95).