타입
텅스텐%
코발트%
입자크기
항절력(T.R.S.)
밀도[g/cm]
경도(HRA)
ISO계열
A
90
10
0.6
3600
14.5
91.9
K30-K40
B
88
12
0.4
3800
14.1
92.3
K40-K50
C
86.65
13
0.4
3900
13.9
92.4
K40-K50
D
89.8
9
0.2
4000
14.3
94.4
