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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