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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iron, which is also called as ductile iron, spheroidal graphite or nodular graphite cast iron, This standard has been replaced by BS EN 1563 1997.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 structureparameter

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 temperature20±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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