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.index-module_taskLogo__71Tj5{height:66px;position:absolute;right:30px;top:0;width:66px}.index-module_drawerHand__aRhcO.index-module_open__qMl5O{right:480px}.index-module_reverse__OKr6k{transform:rotate(180deg)}網(wǎng)頁新聞貼吧知道網(wǎng)盤圖片視頻地圖文庫資訊采購百科百度首頁登錄注冊進(jìn)入詞條全站搜索幫助首頁秒懂百科特色百科知識專題加入百科百科團(tuán)隊權(quán)威合作個人中心c40本詞條是一個多義詞，請在下列義項中選擇瀏覽添加義項水稻品種國際城市聯(lián)合組織運(yùn)動美學(xué)純電SUV新手上路成長任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問內(nèi)容質(zhì)疑在線客服官方貼吧意見反饋投訴建議舉報不良信息未通過詞條申訴投訴侵權(quán)信息封禁查詢與解封?2024?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?|?京ICP證030173號?京公網(wǎng)安備11000002000001號window.PAGE_DATA= 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C40C40是一優(yōu)質(zhì)碳素結(jié)構(gòu)鋼，焊接性能較差，用于制造易磨損的零件，如軸、齒輪等。執(zhí)行標(biāo)準(zhǔn):EN 10083/2-1991特性及適用范圍：焊接性能較差，用于制造易磨損的零件，如軸、齒輪等?；瘜W(xué)成份：碳 C ：0.37～0.45硅 Si：0.17～0.37錳 Mn：0.70～1.00硫 S ：≤0.045磷 P ：≤0.045鉻 Cr：≤0.40鎳 Ni：≤0.40鉬 Mo：≤0.10力學(xué)性能：抗拉強(qiáng)度 σb (MPa)：≥590(60)屈服強(qiáng)度 σs (MPa)：≥355(36)伸長率 δ5 (％)：≥17斷面收縮率 ψ (％)：≥45沖擊功 Akv (J)：≥47沖擊韌性值 αkv (J/cm2)：≥59(6)硬度 ：未熱處理,≤229HB;退火鋼,≤207HB試樣尺寸：試樣尺寸為25mm熱處理規(guī)范及金相組織：熱處理規(guī)范：正火,860℃;淬火,840℃;回火,600℃。交貨狀態(tài)：以不熱處理或熱處理（退火、正火或高溫回火）狀態(tài)交貨。要求熱處理狀態(tài)交貨的應(yīng)在合同中注明，未注明者按不熱處理交貨。
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