純鐵, 20, 7.87, 0.461, 67. 鑄鐵, 20, 7.28, 0.461, 48. 碳鋼(0.5C以下), 20, 7.83, 0.461, 53. 碳素鋼(1C), 20, 7.8, 0.461, 45.
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