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GB/T 9437 QTRA122 Heat - resistant cast steel Precision Casting
Symbol |
Chemical composition |
|
||||
|
C max |
Si max |
Mn max |
P max |
S max |
Mo max |
QTRA122 |
1.6~2.2 |
1.0~2.0 |
0.7 |
0.07 |
0.015 |
- |
GB/T 9437 QTRA122 precision castings chemical composition unit
Symbol |
Yield point or proof stress N/mm2 |
Tensile strength N/mm2 |
Elongation % min |
According to the contract |
||
Transverse Shrinkage Z/% |
Impact Toughness KU2/J |
Hardness |
||||
QTRA122 |
- |
≥300 |
|
- |
- |
241~364 |
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