| Grade |
Typical property
values |
Performance &
Applications |
Density
g/cm3 |
Bending
Strength
N/mm2 |
Hardness
HRA |
| Z10 |
14.85~15.0 |
1800~2100 |
88.5~91.0 |
High wear resistance, for
pillar bit drills. |
| Z20 |
14.65~14.85 |
2100~2500 |
87.5~89.0 |
Excellent wear resistance and
toughness, for pillar bit drills. |
| Z25 |
14.45~14.65 |
2300~2700 |
86.5~88.0 |
Of high toughness and wear
resistance as well as good versatility, for rotary hammer rock
drill bits and pillar bit drills, for f14~f16 medium hard and hard
rock formations. |
| Z30 |
14.4~14.6 |
2350~2800 |
86.0~87.5 |
High toughness and wear
resistance and good versatility, for rotary hammer rock drill bits
and heavy rock drill bits, for f16~f18 hard and medium hard rocks
formations. |
| K05 |
14.4~14.7 |
2200 |
>=87.5 |
High toughness, wear
resistance and performance, for single line and cross bits of
rotary hammer rock drills for hard rock formations. |
| K510 |
14.5~14.8 |
2100~2600 |
>=88.5 |
High toughness and wear
resistance, for pillar picks and coal cutting picks. |
| K520 |
14.4~14.6 |
2300~2800 |
>=87.5 |
High toughness, wear
resistance and complex properties, for bits of hammer rock drills
and heavy rock drills for cutting hard rocks. |
| ZY31 |
13.6~13.8 |
>=2450 |
>=83.5 |
High impact toughness,
for hi-speed wire mills for primary and intermediate rolling of
mild wire rods. |
ZY32
ZY33 |
13.8~14.1 |
>=2400 |
>=84.0
>=85.0 |
High toughness and wear
resistance, for hi-speed wire mills for intermediate and finish
rolling ,able to use for hard wires. |
