Brocadur® Copper Alloys

Trade name:   Brocadur® CCZ Brocadur® CNCS Brocadur® CCB Brocadur® CCNB Brocadur® CCNB-EH Brocadur® NIBE Brocadur® B20
Chemical composition (in % of weight) Cr 0.8 0.4 - - - - -
  Zr 0.1 - - - - - -
  Co - - 2.0 1.0 1.0   0.4
  Ni - 2.4 - 1.0 1.0 1.7 0.4
  Be - - 0.5 0.5 0.5 0.3 2.0
  Al - - - - - - -
  Si 0.7 - - - - -
  P - - 0.2 0.2 - - -
  Others max. 0.2 max. 0.2 max. 0.2 max. 0.2 max. 0.2 max. 0.2 max. 0.2
  Cu remainder remainder remainder remainder remainder remainder remainder
Material number (DIN)   2.1293  2.0855 2.1285   ˜2.1285   ˜2.1285  2.085  2.1247 
International standards   R.W.M.A Class 2  R.W.M.A Class 3 R.W.M.A Class 3 R.W.M.A Class 3 R.W.M.A Class 3  R.W.M.A Class 3 R.W.M.A Class 4
UNS    C18150 C18000 C175070  ˜C17500   ˜C17500  C17510  C17200
Mechanical properties (standard values at 20°C):                
Hardness Brinell HB 30 135-170 180-220 230-260 230-260 265-285 210-250 320-370
Tensile strenght N/mm² 300-380 700-900 720-820 720-820 750-850 700-760 1200-1300
0,2%- yield strenght N/mm² 320-410 490-550 660-740 660-740 700-760 650-700 950-1050
Elongation A 5 % 14-18 10-12 10-14 10-14 8-12 10-14 2-7
Modules of elasticity N/mm² 125 x 10³ 115 x 10³ 135 x 10³ 135 x 10³ 135 x 10³ 135 x 10³ 135 x 10³
Softening temperature °C 500 480 480 480 480 480 300
Physical properties (standard values at 20°C):                
Specific weight g/cm³ 8.9 8.8 8.8 8.8 8.8 8.8 8.3
Thermal conductivity W/mK 320 220 250 250 260 290 120
Electrical conductivity % IACS 80 (47 MS/m) 48 (28 MS/m) 48 (28 MS/m) 48 (28 MS/m) 50 (29 MS/m) 69 (40 MS/m) 26 (15 MS/m)
Thermal expansion coefficient 20-300C 17.0 x 10  ̄⁶ 16.0 x 10  ̄⁶ 17.2 x 10  ̄⁶ 17.2 x 10  ̄⁶ 17.2 x 10  ̄⁶ 17.2 x 10  ̄⁶ 17.0 x 10  ̄⁶
Forms of delivery:                
Round drawn   o o o o o o o
Round forged   o o o o o o o
Flat, squaer, hexagon drawn   o o o o o o o
Flat, square forged   o o o o o o o
forged plates   o o o o o o o
cut from forged round bar / plate   o o o o o o o
Cut from premachined round bar / plate   o o o o o o o
Tube     o          
    CCZ CNCS CCB CCNB CCNB-EH NIBE B20

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Note: N/mm² = 1MPa, 1MS/m = 1 m/Ωmm², 100% IACS = 58 MS/m