Copper Ejectors, Ampcoloy 940

Ejector Pins with cylindrical head / Similar to DIN ISO

6751 A.                                

Range of application:

Injection moulding and die-casting with high thermal conductivity 

Advantages: 

better product quality because of better temperature distribution 

reduced time of the design cycle 

long service life design for optimum friction 

higher thermal conductivity than the WS or WAS pins

The dimensions are shown in the table. 

Material: 

Special copper alloy - beryllium free copper alloy.

Thermal conductivity: 

Approx. 200C ~ 180-208 W/mK

Tensile strenght: 

Approx. 650 N/mm2 

Hardness:

Shank:  HRC min 180 HB

Head: HRC min 180 HB

Technical data: 

Tear strength Rm: 650-750 N / mm 2 

The yield strength (0.2 % creep limit): 500-650 N / mm 2 

Specific heat capacity: approx .: 380 J / kgK 

Thermal conductivity at 20 ° C / 68 ° F.: about 200 W / mK 

The coefficient of heat expansion of 20-200 ° C: 0,000016 K 

Softening point: 420 ° C / 788 ° F 

Finish: 

Ground shank, hot forged cylindrical head.