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BS 2789 1985 Standard for
Nodular Iron
This is a UK standard for stipulating the
physical properties of nodular iron,
which is also called as ductile iron,
spheroidal graphite or nodular graphite
cast iron, This standard has been
replaced by BS EN 1563 1997.
This standard is similar with the other
standards for nodular iron such as
ASTM A536
in USA, GB
T1348 in China,
KS D4302
in Korea, DIN
1693 in Germany and
ISO 1083.
The following is the main content of BS
2789-1985 standard for your reference.
Grade and mechanical properties and
additional conditions of nodular cast
iron
|
Grade |
Tensile strength
σb≥/Mpa |
Yield strength
σ0.2≥/Mpa |
Elongation
δ≥（%） |
Hardness
HBS |
Matrix structure（parameter） |
|
900/2 |
900 |
600 |
2 |
302~359 |
tempered
martensite |
|
800/2 |
800 |
480 |
2 |
248~352 |
perlite
tempered structure |
|
700/2 |
700 |
420 |
2 |
229~302 |
perlite
|
|
600/3 |
600 |
370 |
3 |
192~269 |
perlite
/ferrite |
|
500/7 |
500 |
320 |
7 |
170~241 |
ferrite/
perlite |
|
450/10 |
450 |
320 |
10 |
160~221 |
ferrite/
perlite |
|
420/12 |
420 |
270 |
12 |
≤212 |
ferrite |
|
400/18 |
400 |
250 |
18 |
≤179 |
ferrite |
|
400/18L20 |
400 |
250 |
18 |
≤179 |
ferrite |
|
350/22 |
350 |
220 |
22 |
≤160 |
ferrite |
|
350/22L40 |
350 |
220 |
22 |
≤160 |
ferrite |
/J for nodular cast iron
|
Grade |
/J at the following temperature |
|
Room temperature（20±5）℃ |
-（20±2）℃ |
-（40±2）℃ |
|
Average value of three specimen |
Individual value |
Average value of three specimen |
Individual value |
Average value of three specimen |
Individual value |
|
400/18 |
≥14 |
≥14 |
- |
- |
- |
- |
|
400/18L20 |
- |
- |
≥12 |
≥9 |
- |
- |
|
350/22 |
≥17 |
≥14 |
- |
- |
- |
- |
|
350/22L40 |
- |
- |
- |
- |
≥12 |
≥9 |
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