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  GB 9439 Malleable Iron Casting

 

GB 9439-88 Black Malleable Iron Casting and Malleable Pearlite Iron Casting Mechanical Properties

 

Number

Trail Diameter mm

Tensile Strength

(MPa)

Yield Strength

(MPa)

Percentage Elongation

%

Hardness

HB

A

B (transit number)

Not less than N/mm

Not less than

 

 

 

≤150

KTH30-06

 

 

 

 

 

12 OR 15

300

 

6

 

KTH330-08

330

 

8

KTH350-10

 

350

200

10

 

KTH370-12

370

 

12

KTZ450-06

 

450

270

6

150-200

KTZ550-04

 

550

340

4

180-230

KTZ650-02

 

650

430

2

210-260

KTZ700-02

 

700

530

2

240-290

 



Notes: 1.Trail diameter 12 mm only suitable for the casings whose wall thickness are less than 10
2. No.KTH300-06 is suitable for tightness goods.

GB 9439-88 White Heart Malleable Iron Mechanical Properties

 

 

Number

Trail Diameter d mm

Tensile Strength

(MPa)

Yield Strength

(MPa)

Percentage Elongation

%

Not less than

Hardness

HB

Not more than

Not less than N/mm

KTB350-04

9

340

 

5

230

12

350

 

4

15

360

 

3

KTB380-12

9

320

170

15

200

12

380

200

12

15

400

210

8

KTB400-05

9

360

200

8

220

12

400

220

5

15

420

230

4

TB450-07

9

400

230

10

220

12

450

260

7

15

480

280

4

 



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