27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格
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27SiMn (GB/T 3077-1988)   
     ●特性及適用范圍:                                                      
     性能優于 30Mn2鋼，淬透性高。用作高韌性和耐磨性的熱沖擊零件，用作截面＜30
 mm的零件時，可代替 25Ni3鋼；也可用于不經熱處理的零件；或在正火后應用，如拖拉
 機的履帶銷等。                                                             
                                                                           
     ●化學成份:                                                            
     碳 C : 0.24～0.32                                                      
     硅 Si: 1.10～1.40                                                      
     錳 Mn: 1.10～1.40                                                      
     硫 S : 允許殘余含量≤0.35                                              
     磷 P : 允許殘余含量≤0.35                                              
     鉻 Cr: 允許殘余含量≤0.30                                              
     鎳 Ni: 允許殘余含量≤0.30                                              
     銅 Cu: 允許殘余含量≤0.30                                              
                                                                           
     ●力學性能:                                                            
     抗拉強度      σb     (MPa):≥980(100)                                 
     屈服強度      σs     (MPa):≥835(85)                                  
     伸長率        δ5      (％):≥12                                       
     斷面收縮率    ψ       (％):≥40                                       
     沖擊功        Akv       (J):≥39                                       
     沖擊韌性值    αkv  (J/cm2):≥49(5)                                    
     硬度                       :≤217HB                                    
     試樣尺寸: 試樣毛坯尺寸為25mm                                           
                                                                           
     ●熱處理規范及金相組織:                                                
     熱處理規范: 淬火920℃,水冷；回火450℃,水冷、油冷。                     
                                                                           
     ●交貨狀態:                                                            
     以熱處理（正火、退火或高溫回火）或不熱處理狀態交貨，交貨狀態應在合同中注
 明。                  
27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格27SiMn價格