40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格
40MnB (GB/T 3077-1999)  
     ●特性及适用范围:                                                      
     具有较高的强度、硬度、耐磨性及良好的韧性，是一种取代40Cr钢较成功的新钢种
 。用作汽车上的转向臂、转向节、转向轴、半轴、蜗杆、花键轴、刹车调整臂等，也可
 代替40Cr钢制造较大截面的零件。                                             
                                                                           
     ●化学成份:                                                            
     碳 C : 0.37～0.44                                                      
     硅 Si: 0.17～0.37                                                      
     锰 Mn: 1.10～1.40                                                      
     硫 S : 允许残余含量≤0.35                                              
     磷 P : 允许残余含量≤0.35                                              
     铬 Cr: 允许残余含量≤0.30                                              
     镍 Ni: 允许残余含量≤0.30                                              
     铜 Cu: 允许残余含量≤0.30                                              
     硼 B : 0.0005～0.0035                                                  
                                                                           
     ●力学性能:                                                            
     抗拉强度      σb     (MPa):≥980(100)                                 
     屈服强度      σs     (MPa):≥785(80)                                  
     伸长率        δ5      (％):≥10                                       
     断面收缩率    ψ       (％):≥45                                       
     冲击功        Akv       (J):≥47                                       
     冲击韧性值    αkv  (J/cm2):≥59(6)                                    
     硬度                       :≤207HB                                    
     试样尺寸: 试样毛坯尺寸为25mm                                           
                                                                           
     ●热处理规范及金相组织:                                                
     热处理规范: 淬火850℃,油冷；回火500℃,水冷、油冷。                     
                                                                           
     ●交货状态:                                                            
     以热处理（正火、退火或高温回火）或不热处理状态交货，交货状态应在合同中注
 明。  
40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格40MnB价格