Heat-resistant cast iron (GB / T9437-1988)
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Heat-resistant cast iron (GB / T9437-1988)
(1) Brand number and chemical composition.
|
class |
the name of a shop |
Chemical composition (mass fraction)(%) |
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|
C |
Si |
Mn |
P |
S |
Cr |
Al |
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|
≤ |
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|
heat resisting cast iron |
RTCr |
3.0-3.8 |
1.5-2.5 |
1.0 |
0.20 |
0.12 |
0.50-1.00 |
- |
|
RTCr2 |
3.0-3.8 |
2.0-3.0 |
1.0 |
0.20 |
0.12 |
>1.00-2.00 |
- |
|
|
RTCr16 |
1.6-2.4 |
1.5-2.2 |
1.0 |
0.10 |
0.05 |
15.00-18.00 |
- |
|
|
RTSi5 |
2.4-3.2 |
4.5-5.5 |
0.8 |
0.20 |
0.12 |
0.50-1.00 |
- |
|
|
Heat resistant ink cast iron |
RTQSi4 |
2.4-3.2 |
3.5-4.5 |
0.7 |
0.10 |
0.03 |
- |
- |
|
RTQSi4Mo |
2.7-3.5 |
3.5-4.5 |
0.5 |
0.10 |
0.03 |
Mo:0.3-0.7 |
- |
|
|
RTQSi5 |
2.4-3.2 |
>4.5-5.5 |
0.7 |
0.10 |
0.03 |
- |
- |
|
|
RTQAl4Si4 |
2.5-3.0 |
3.5-4.5 |
0.5 |
0.10 |
0.02 |
- |
4.0-5.0 |
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RTQAl5Si5 |
2.3-2.8 |
>4.5-5.2 |
0.5 |
0.10 |
0.02 |
- |
>5.0-5.8 |
|
|
RTQAl22 |
1.6-2.2 |
1.0-2.0 |
0.7 |
0.10 |
0.03 |
- |
20.0-24.0 |
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Note: In the symbol of the brand, "RT" means heat-resistant cast iron, "Q" means ductile iron, the remaining letters are alloy element symbols, the number indicates the average content (mass fraction) of alloy elements, take the integer value.
(2) Mechanical properties
Room-temperature mechanical properties of heat-resistant iron castings
|
the name of a shop |
Tensile strength of б b / Mpa |
hardness HBS |
the name of a shop |
Tensile strength of б b / Mpa |
hardness HBS |
|
RTCr |
200 |
189-288 |
RTQSi4Mo |
540 |
197-280 |
|
RTCr2 |
150 |
207-288 |
RTQSi5 |
370 |
228-302 |
|
RTCr16 |
340 |
400-450 |
RTQAl4Si4 |
250 |
285-341 |
|
RTSi5 |
140 |
160-270 |
RTQAl5Si5 |
200 |
302-363 |
|
RTQSi4 |
480 |
187-269 |
RTQAl22 |
300 |
241-364 |
High temperature short time tensile strength of heat resistant iron cast
|
the name of a shop |
Tensile strength of б b / Mpa at the following temperature (℃) |
the name of a shop |
Tensile strength of б b / Mpa at the following temperature (℃) |
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|
500 |
600 |
700 |
800 |
900 |
500 |
600 |
700 |
800 |
900 |
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|
RTCr |
225 |
144 |
- |
- |
- |
RTQSi4Mo |
- |
- |
101 |
46 |
- |
|
RTCr2 |
243 |
166 |
- |
- |
- |
RTQSi5 |
- |
- |
67 |
30 |
- |
|
RTCr16 |
- |
- |
- |
144 |
88 |
RTQAl4Si4 |
- |
- |
- |
82 |
32 |
|
RTSi5 |
- |
- |
41 |
27 |
- |
RTQAl5Si5 |
- |
- |
- |
167 |
75 |
|
RTQSi4 |
- |
- |
75 |
35 |
- |
RTQAl22 |
- |
- |
- |
130 |
77 |
