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磷(Phosphorus)是***元素,降低鋼的塑性和韌性,出現(xiàn)冷脆性,能使鋼的強(qiáng)度顯著提高,同時(shí)提高大氣腐蝕穩(wěn)定性,含量應(yīng)該限制在0.05%以下。硫(Sulfur)通常硫是***元素,使鋼熱脆性大,含量限制在0.05%以下。但是易切削鋼的硫含量高,可達(dá)0.08%~0.40%。鋼指含碳量小于2%的鐵碳合金。根據(jù)成分不同,又可分為碳素鋼和合金鋼。應(yīng)用編輯屋面系統(tǒng)輕鋼結(jié)構(gòu)住宅屋面系統(tǒng)是由屋架、結(jié)構(gòu)OSB面板、防水層、輕型屋面瓦(金屬或?yàn)r青瓦)及相關(guān)連接件組成的。根據(jù)性能和用途不同,又可分為結(jié)構(gòu)鋼、工具鋼和特殊性能鋼。
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