Technical Properties

Compare the technical properties of all WIRBALIT copper alloys to find the optimal material for your resistance welding application.

Properties Comparison

Alloy	Composition	Conductivity % IACS	Thermal Cond. W/mK	Hardness HB	Tensile Strength MPa	Softening Temp. °C
WIRBALIT® HF/N/G	CuCr1Zr	≥ 80%	≥ 320	120-170	400-550	≥ 500
WIRBALIT® B	CuCo2Be	45-60%	180-220	200-400	700-1200	≥ 550
WIRBALIT® D	CuNi2.5SiCr	35-45%	150-190	180-280	600-900	≥ 550
WIRBALIT® CA	CuAl2O3	85-92%	330-365	65-90 HRB	350-500	≥ 900
WIRBALIT® L	CuAg0.10P	≥ 98%	≥ 380	50-90	220-350	≥ 340

* Values shown are typical ranges. Actual properties may vary based on product form and heat treatment condition.

CuAg0.10P

Up to 98% IACS electrical conductivity

CuCo2Be

Up to 400 HB for maximum wear resistance

CuCo2Be

Up to 1200 MPa tensile strength

CuAl2O3

900C softening temperature

Application	Recommended Alloy	Reason
General purpose spot welding	CuCr1Zr	Best balance of conductivity and mechanical properties
High-volume production (coated steels)	CuCo2Be	Highest hardness for maximum electrode life
Seam welding wheels	CuNi2.5SiCr	Superior thermal stability and strength
Aluminum alloy welding	CuAl2O3	Extreme temperature resistance, minimal sticking
Projection welding dies	CuCo2Be or CuNi2.5SiCr	High hardness and wear resistance
Flash butt welding	CuNi2.5SiCr or CuAl2O3	High-temperature stability
Maximum conductivity required	CuAg0.10P	Highest conductivity (≥98% IACS) with improved softening resistance
Electrode holders and bus bars	CuAg0.10P or CuCr1Zr	High current-carrying capacity