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Author: wubaia
Time: 10/07/07 20:15 PST
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material

Hello everyone:

                My company received a enquiry about screw.  The material showed:

 

  CMn  P Rm(Mpa)  Rp0,2 Mb(Nm) 
 A 0.25~0.55  max. 0.035 max. 0.035 max. 0.003 800 64013  
 B 0.15~0.4 0.6 max. 0.035 max. 0.035 max. 0.003 800 640 13 

 

 

I know the grade should be 8.8.  But what is the difference between material A and B?

 

 

Thank you,

 

Best regards,

 

Shelly

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