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32 lines
1.2 KiB
Plaintext
32 lines
1.2 KiB
Plaintext
---
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title: Cold-Rolled Low Carbon Steel Sheet
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desc: Has high strength and good welding performance, excellent surface quality and shape, suitable for hardware, pipes and building structural parts that have certain requirements for strength and processing performance.
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models:
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- GB/T 11253-2007: Q235
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- 2011 JX(19): LQ215
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- 2011 JX(21): THD
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spec:
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- 'Thickness: 0.6~2.0mm'
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- 'Width: 1000~1540mm'
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slug: '5'
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---
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## Chemical Composition
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| Grade | C | Mn | Si | P | S |
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| :--- | :--- | :--- | :--- | :--- | :--- |
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| Q235 | ≤0.22 | ≤1.40 | ≤0.35 | ≤0.035 | ≤0.035 |
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| DX51D | ≤0.22 | ≤1.20 | ≤0.35 | ≤0.035 | ≤0.035 |
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| S350GD | ≤0.22 | ≤1.20 | ≤0.35 | ≤0.035 | ≤0.035 |
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## Mechanical Properties
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| Grades | Yield strength/Re/MPa | Tensile strength/Rm/MPa | Elongation/A80/% | Hardness/HRB | 180° bending test (bend diameter d) |
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| :--- | :--- | :--- | :--- | :--- | :--- |
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| Q235 | ≥235 | 370-500 | ≥22 | - | d=1a |
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| LQ215 | ≥215 | 335-450 | ≥24 | - | d=0.5a |
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| THD | - | - | - | 65-80 | - |
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---
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1. When there is no obvious yield, use Rp0.2; otherwise use Rel.
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2. Sample width B: When B＞20mm, take B=20mm; *a is sample thickness*.
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3. Tensile test and bending test take transverse samples.
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