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  GB 9439 HT100 Gray Cast Iron  
 

GB 9439 HT100 refers to grey cast iron with low tensile strength of 100MPa.

Applications of GB 9439 HT100 Gray Cast Iron:
Used for manufacturing simple castings which only bear light load, such as protective cover, cover, oil pan, hand wheels, frame, floor, hammer, small handle, counter weights, etc.

Chemical Analysis of GB 9439 HT100 Grey Cast Iron(mass fraction)(%)

Grade

Thickness
/mm

C

Si

Mn

P

S

HT100

-

3.4~3.9

2.1~2.6

0.5~0.8

0.3

0.15

As for normal grey iron, the chemical composition is not important comparatively. The iron foundries could adjust the compositions according to their experience as long as they could meet the physical and mechanical requirements.

Tensile strength of cast integral test bar and castings for GB 9439 HT100 Grey Cast Iron

Grade

Cast integral test bar
Tensile strength
σb≥/Mpa

castings

Thickness
/mm

Tensile strength
σb≥/Mpa

HT100

100

>2.5~10
>10~20
>20~30
>30~40

130
100
90
80

The hardness grade and range of GB 9439 HT100 Grey cast iron

Grade

Hardness grade

Hardness range of casting
HBS

Relevant microstructure

HT100

H145

≤170

ferrite

Equivalent Grade for GB 9439 HT100 Grey cast iron:
ISO 185/JL/100, DIN 1691 GG10, EN1561 EN-GJL-100, JIS G5501 FC100, UNI 5007 G10, BS 1452 100, NBN 830-01 FGG10, AS 1830 T100, SS 14 01 O110, NS11 100 SJG100.

 

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