Make round precision percing punches per DIN9861D,DIN9861DA

Mateiral: HSS(1.3343),HWS(1.2080),WS(1.2516,1.2210,1.2067),cpm10v

Hardened: head =HRC 45±5(HWS,WS) HRC55±5(HSS) Body =HRC62± 2(HWS) HRC64±2(HSS)

hws=heavy duty tool steel(12% chrome),
hss= heavy duty high speed stee,
cpm10v=power metallurgy produced high speed steel
 

The punch shaft though accurately grinded and straightened, the head is
reprocessed after anneal. This way make the punch have good tolerance and stable quality.

at least 4 times salt-bathing make it has good hardness.

OD(outer diameter) we can make is from 0.5mm to 15. Length is 71,80 100,130mm

Surface coating: TIN,TIC,TIAL make surface hardness more than 1500HV-2000.