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8731-1988目錄1基本信息2化學(xué)成份3力學(xué)性能4規(guī)范及金相組織基本信息播報(bào)編輯：：：密度：7.85cm/g*3化學(xué)成份播報(bào)編輯碳 C ：0.10硅 Si：≤0.15錳 Mn：0.80～1.20硫 S ：0.23～0.33磷 P ：0.05～0.10鉛 Pb：0.15～0.35力學(xué)性能播報(bào)編輯抗拉強(qiáng)度 σb (MPa)：(熱軋)390～540;(冷拉)鋼材厚度或直徑 8～20時(shí):530～755; ＞20～30時(shí):510～735; ＞30時(shí):490～685伸長(zhǎng)率 δ5 (%)：(熱軋)≥22;(冷軋)≥7.0斷面收縮率 ψ (%)：(熱軋)≥36硬度 ：(熱軋)≤170HB;(冷拉鋼)152～217HB規(guī)范及金相組織播報(bào)編輯交貨狀態(tài)以熱軋或冷拉狀態(tài)交貨，交貨狀態(tài)應(yīng)在合同中注明。新手上路成長(zhǎng)任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問(wèn)內(nèi)容質(zhì)疑在線客服官方貼吧意見(jiàn)反饋投訴建議舉報(bào)不良信息未通過(guò)詞條申訴投訴侵權(quán)信息封禁查詢與解封?2025?Baidu?使用百度前必讀?|?百科協(xié)議?|?隱私政策?|?百度百科合作平臺(tái)?|?京ICP證030173號(hào)?京公網(wǎng)安備11000002000001號(hào)window.PAGE_DATA= 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