Grade |
Equal to ISO Category Number |
Performance |
usages |
Density |
Bend Strength |
Hardness |
G/Cm3 |
N/mm2 |
HRA |
YK25 |
K40 |
14-.3-14.6 |
≥ 2100 |
≥ 86.5 |
Qualified for molding the drills for heavy-duty rock drill, detachable bits used for deep hole drilling, rock drill trolley, etc. |
YG8C |
K20 |
14.7-14.8 |
> 2200 |
> 88.5 |
YG11C |
K40 |
14.0--14.4 |
≥ 2060 |
≥ 86.0 |
YG15 |
K40 |
13.9-14.1 |
≥ 2020 |
≥ 86.5 |
Qualified for hard rock drilling, steel bars with high compression ratios, pipe drawing, punching tools, core cabinet of powder metallurgy automatic molders, etc. |
YG6 |
K20 |
14.7-15.1 |
≥1670 |
≥89.5 |
Qualified for finish machining and semi-finish machining for the cast iron, non-ferrous metal, alloy and unalloyed materials. Also qualified for wire drawing for the steel and non-ferrous metal, electric drill for geology use and steel drill etc. |
YG8 |
K20-K30 |
14.6-14.9 |
≥1840 |
≥89 |
Qualified for rough machining of cast iron, non-ferrous metal, nonmetal materials, drawing of steel, non-ferrous metal and pipes, various drills for geology use, tools for machine manufacture and wearing parts. |
YG20 |
/ |
13.4-14.8 |
≥ 2480 |
≥ 83.5 |
Qualified for making dies with low impact such as punching watch parts, battery shells, small screw caps, etc. |
YG20C |
/ |
13.4-14.8 |
≥ 2480 |
≥ 82.5 |
Qualified for making moulds of cold heading, cold stamping and cold pressing used for manufacturing standard parts, bearings, etc. |