Q345化學成分、機械性能、沖擊溫度
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Q345鋼
Q345是一種低合金高強度結構鋼。Q代表的是這種材質的屈服強度，后面的345，就是指這種材質的屈服值，在345兆帕左右。并會隨著材質的厚度的增加而使其屈服值減小。
化學成分及機械性能
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Chemical Constituent(化學成分) |
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C |
Si |
Mn |
P |
S |
V |
Nb |
Al |
Ti |
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Q345A |
≤0.20 |
≤0.55 |
1.00-1.60 |
≤0.045 |
≤0.045 |
0.02-0.15 |
0.015-0.060 |
- |
0.02-0.20 |
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Q345B |
≤0.20 |
≤0.55 |
1.00-1.60 |
≤0.040 |
≤0.040 |
0.02-0.15 |
0.015-0.060 |
- |
0.02-0.20 |
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Q345C |
≤0.20 |
≤0.55 |
1.00-1.60 |
≤0.035 |
≤0.035 |
0.02-0.15 |
0.015-0.060 |
≥0.015 |
0.02-0.20 |
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Q345D |
≤0.18 |
≤0.55 |
1.00-1.60 |
≤0.030 |
≤0.030 |
0.02-0.15 |
0.015-0.060 |
≥0.015 |
0.02-0.20 |
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Q345E |
≤0.18 |
≤0.55 |
1.00-1.60 |
≤0.025 |
≤0.025 |
0.02-0.15 |
0.015-0.060 |
≥0.015 |
0.02-0.20 |
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mechanical properties （機械性能） |
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thickness(mm) |
Test Temperature(℃) |
Elongation（%） |
Proof Stress(Mpa) |
Tensile Strength(Mpa) |
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壁厚 |
測試溫度 |
延長率 |
屈服強度 |
抗拉強度 |
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Q345A |
≤16 &nb, sp; |
- |
21 |
345 |
470-630 |
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Q345B |
≤16 |
20 |
21 |
345 |
470-630 |
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Q345C |
16-35 |
0 |
22 |
≥325 |
470-630 |
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Q345D |
35-50 |
-20 |
22 |
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