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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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