C3604. 57.0~61.0, 1.8-3.7, ≦0.50, Fe+Sn≦1.2, 其餘. C3605. 56.0~60.0, 3.5-4.5, ≦0.50, Fe+Sn≦1.2, 其餘. 鍛造. C3771. 57.0~61.0, 0.5-2.5, Fe+Sn≦1.0, 其餘.
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