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| 1.Φ3.6×9m Ball Mill Shell |
2.Φ4.2×13m Cement Mill Shell | 3.Cement Mill Shell |
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| 4.Φ5.5×8.5Grinding Mill Shell | 5.Φ7.9×13.6m Ball Mill Shell |
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Chemical Composition
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Smelting Analysis (%)
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Product Analysis (%)
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C
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0.22-0.27
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0.20-0.30
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Si
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0.17-0.32
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0.14-0.35
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Mn
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0.6-1.0
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0.6-1.05
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Cr
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﹤ 0.25
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﹤ 0.25
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Cu
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﹤ 0.25
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﹤ 0.25
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Ni
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﹤ 0.25
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﹤ 0.25
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P
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≤ 0.01
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≤ 0.01
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S
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≤ 0.01
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≤ 0.01
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Note: Carbon equivalent should be less than 0.45 CE=%C+
 +
Calculation formula:The bigger the CE value of carbon equivalent is, the bigger the hardening tendency of steel is, and the worse the weldability of steel is. When CE < 0.4%, the hardening tendency of steel is not obvious and the weldability is good. When CE = 0.4%-0.6%, especially when CE is more than 0.5%, the steel is easy to harden, and the weldability is poor, so the crack can be prevented only by preheating during welding. When CE > 0.6%, the tendency of hardening and cold cracking of steel is serious, and the weldability is poor, so it is generally not used to produce welded structures.
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2. Chemical composition (wt%) and mechanical properties of steel plate flange Table2
| Steel Grade | Yield Strength Rel(Mpa) |
Tensile Strength Rm(Mpa) | Elongation Rate A（%） | Section ShrinkageZ（%） |
| ASTMA266/A266M | ≥450 | ≥450 | ≥23 | 38 |
