Name

Chemical Elements (%)

C

Si

Mn

Cr

Mo

Cu

P

S

Special High Cr

2.0-3.3

≤1.2

0.3-1.5

15-23

0-3

≤1.2

≤0.06

≤0.06

Normal High Cr

2.0-3.3

≤1.2

0.3-1.5

10-13

0-3

≤1.2

≤0.06

≤0.06

Medium Cr Balls

2.0-3.3

≤1.2

0.3-1.5

4-6

0-1.0

0-1.2

≤0.06

≤0.06

Low Cr Balls

2.1-3.6

≤1.5

0.3-1.5

1-3

0-1.0

0-0.8

≤0.06

≤0.1

Name

HRC

Ak(J/cm²)

Microstructure

Times of Falling Balls

Normal High Cr

≥60

≥4

M+C+A

≤Φ80

≥15000

≥Φ80

≥10000

Medium Cr Balls

≥48

≥3.0

P+C

≤Φ80

≥15000

≥Φ80

≥10000

Low Cr Balls

≥45

≥2.5

P+C

≥10000

 M-Martensite   C-Carbide   A-Austenite   P-Pearlite