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.