Gray cast iron composition

Cast iron is an alloy consisting of iron and 5 main attendant elements C, Si, Mn, P and S. The element C and Si have got the most important influence on the ultimate tensile strength and Brinell hardness (HBW). The higher the C and Si content, the higher are the values of Rm and HB. Mn, P and S have got a minor influence.

 

Chemical analysis of gray cast iron(mass fraction)%for q reference:

Material No.

Wall thickness

/mm

C

Si

Mn

P

S

HT-100

-

3.3~3.8

2.1~2.7

0.5~0.8

0.3

0.15

HT-150

<15

15~30

30~50

>50

3.3~3.7

3.2~3.6

3.1 ~3.5

3.0~3.4

2.0~2.4

2.3~2.3

1.9~2.2

1.8~2.1

0.5~0.8

0.2

0.12

HT-200

<15

15~30

30~50

>50

3.2~3.6

3.1~3.5

3.0~3.4

3.0~3.2

1.9~2.2

1.8~2.1

1.5~1.8

1.4~1.7

0.6~0.9

0.7~0.9

0.8~1.0

0.8~1.0

0.15

0.12

HT-250

<15

15~30

30~50

>50

3.2~3.5

3.1~3.4

3.0~3.3

2.9~3.2

1.8~2.1

1.6~1.9

1.5~1.8

1.4~1.7

0.7~0.9

0.8~1.0

0.8~1.0

0.9~1.1

0.15

0.12

HT-300

<15

15~30

30~50

>50

3.1~3.5

3.0~3.3

2.9~3.2

2.8~3.1

1.5~1.8

1.4~1.7

1.4~1.7

1.3~1.6

0.8~1.0

0.8~1.0

0.9~1.1

1.0~1.2

0.15

0.12

HT-350

<15

15~30

30~50

>50

2.9~3.2

2.8~3.1

2.8~3.1

2.7~3.0

1.4~1.7

1.3~1.6

1.2~1.5

1.1~1.4

0.9~1.2

1.0~1.3

1.0~1.3

1.1~1.4

0.15

0.12