The main difference is that P460QH is a quenched and tempered steel with enhanced low-temperature properties and quality, while P460Q refers to a similar steel but without the "H" quality suffix, meaning it may not have the same level of guaranteed properties at low temperatures. Both grades have a minimum yield strength of 460 MPa, but the "H" in P460QH indicates a specific "high quality" or "hot" treatment for enhanced toughness, particularly at lower temperatures (e.g., -20°C).
Chemical Composition for P460QH and P460Q
|
P460QH Chemical Composition |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
N |
B |
|
|
P460QH |
0.18 |
0.50 |
1.70 |
0.025 |
0.015 |
0.015 |
0.005 |
|
Mo |
Cu |
Nb |
Ni |
Ti |
V |
Zr |
|
|
0.50 |
0.3 |
0.05 |
0.5 |
0.03 |
0.06 |
0.05 |
|
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
|
P460Q Chemical Composition |
|||||||
|
Grade |
The Element Max (%) |
||||||
|
C |
Si |
Mn |
P |
S |
N |
B |
|
|
P460Q |
0.18 |
0.50 |
1.70 |
0.025 |
0.015 |
0.015 |
0.005 |
|
Mo |
Cu |
Nb |
Ni |
Ti |
V |
Zr |
|
|
0.50 |
0.3 |
0.05 |
0.5 |
0.03 |
0.06 |
0.05 |
|
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
Mechanical Property P460QH and P460Q
|
Grade |
P460Q Mechanical Property |
|||
|
Thickness |
Yield |
Tensile |
Elongation |
|
|
P460Q |
mm |
Min Mpa |
Mpa |
Min % |
|
6-50 |
460 |
550-720 |
19% |
|
|
50-100 |
440 |
550-720 |
19% |
|
|
100-150 |
400 |
500-670 |
19% |
|
|
Grade |
P460QH Mechanical Property |
|||
|
Thickness |
Yield |
Tensile |
Elongation |
|
|
P460QH |
mm |
Min Mpa |
Mpa |
Min % |
|
6-50 |
460 |
550-720 |
19% |
|
|
50-100 |
440 |
550-720 |
19% |
|
|
100-150 |
400 |
500-670 |
19% |
|
