Grade

Chemical composition

Physical properties

Co %

WC %

Hardness HRA

Transverse rupture strength (Sample B) MPa

Density g/cm3

YGH30

15

85

≥83.5

≥2520

13.90-14.10

YGH40

18

82

≥83.0

≥2570

13.60-13.80

YGH45

20

80

≥82.0

≥2570

13.45-13.65

YGH55

26

74

≥81.0

≥2570

12.90-13.10

YGR30

15

85

≥83.0

≥2360

13.98-14.18

YGR40

18

82

≥82.0

≥2400

13.60-13.80

YGR45

20

80

≥80.5

≥2250

13.45-13.65

YGR55

25

75

≥79.0

≥2400

13.00-13.20

YGR60

30

70

≥78.5

≥2200

12.60-12.80

YG15

15

85

≥86.5

≥2220

13.95-14.15

Grade

Recommended applications

YGH30

Moderate wear resistance and impact resistance, good for general purposes. Used in the last 1-4 stands or all stands of finish rolling mills.

YGH40

Best for general purposes. Used in the front stands of good mills and in the rear stands of common mills.

YGH45

Used in the first and second stands of finish rolling mills and in the stands of prefinish rolling mills. For every stand of the rolling lines for low speed rolling, low precision and unstable operation.

YGH55

Maximal binder content in YGH series, good toughness and crack resistance. Used in the stands of prefinish rolling mills and for roll rings for hot rolling screw thread steel.

YGR30

Good toughness, wear resistance, corrosion resistance and crack resistance. Used in the middle and rear stands of finish rolling mills.

YGR40

Good toughness and thermal crack resistance, good for general purpose. Used in most stands of the finish rolling mills and in the rear stands of common mills.

YGR45

Good toughness and thermal crack resistance. Used in the front stands of finish rolling mills.

YGR55

Good impact resistance. Used in the stands of prefinish rolling mills for hot rolling screw thread steel bars and they can be machined with turning and milling.

YGR60

Good impact resistance and toughness. Used for hot rolling screw thread steel bars and in the first and second stands of prefinish rolling mills.

YG15

Cold rolling screw thread steel.