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作螺栓、螺母目錄1標準2適用范圍?化學成份?力學性能3種類標準播報編輯中國牌號：（新牌號為：12Cr18Ni9） 對應美國牌號(ASTM A276-96)：302 對應DIN牌號：1.4307標準：GB/T 1220-1992適用范圍播報編輯由于不銹鋼具有良好的耐腐蝕性，所以它能使結構部件永久地保持工程設計的完整性。含鉻不銹鋼還集機械強度和高延伸性于一身，易于部件的加工制造，可滿足建筑師和結構設計人員的需要。耐空氣、蒸汽、水等弱腐蝕介質和酸、堿、鹽等化學浸蝕性介質腐蝕的鋼。又稱不銹耐酸鋼。實際應用中，常將耐弱腐蝕介質腐蝕的鋼稱為不銹鋼，而將耐化學介質腐蝕的鋼稱為耐酸鋼。由于兩者在化學成分上的差異，前者不一定耐化學介質腐蝕，而后者則一般均具有不銹性。不銹鋼的耐蝕性取決于鋼中所含的合金元素。鉻是使不銹鋼獲得耐蝕性的基本元素，當鋼中含鉻量達到12%左右時，鉻與腐蝕介質中的氧作用，在鋼表面形成一層很薄的氧化膜（ 自鈍化膜），可阻止鋼的基體進一步腐蝕。除鉻外，常用的合金元素還有鎳、鉬、鈦、鈮、銅、氮等，以滿足各種用途對不銹鋼組織和性能的要求。 [1]化學成份 [1]碳 C ：≤0.15%硅 Si：≤1.00%錳 Mn：≤2.00%硫 S ：≤0.030%磷 P ：≤0.045%鉻 Cr：17.00～19.00%鎳 Ni：8.00～10.00%力學性能抗拉強度 σb (MPa)：≥520條件屈服強度 σ0.2 (MPa)：≥205伸長率 δ5 (%)：≥40斷面收縮率 ψ (%)：≥60硬度 ：≤187HB;≤90HRB;≤200HV●熱處理規(guī)范及金相組織：熱處理規(guī)范：固溶1010～1150℃快冷．金相組織：組織特征為奧氏體型。種類播報編輯不銹鋼管種類鋼管尺寸（毫米）精 度-普通級高級--冷拔外徑6-10流體輸送用不銹鋼管Ф355x7-40>10-30結構用無縫不銹鋼管Ф377x8-45->30-50鍋爐、熱交換器用不銹鋼管Ф426x8-50->50流體輸送用不銹鋼管Ф456x8-50-（軋）管壁厚0.5-1.0±0.15毫米Ф530x8-50>1.0-3.0±14%±12%->3.0±12%-10%---10%+10%-新手上路成長任務編輯入門編輯規(guī)則本人編輯我有疑問內容質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?|?京ICP證030173號?京公網(wǎng)安備11000002000001號window.PAGE_DATA= 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