Steel 20MnCr5E 2

[PeterCharles]

I've come across a reference to the above steel.
Can anyone tell me what is the difference between 20MnCr5E and the 'ordinary' 20MnCr5 I am familiar with??

TIA

Peter

 

[mw1st]

I'm not 100% sure about this, but I think that they differ slightly in impurities or alloying elements i.e tighter chemical limits or inclusion rating.

Mark

 

[unclesyd]

The S indicates a machine grade, high sulphur. There are no equivalents to the DIN specification

C;; Mn; Si; Cr; Mo; S; P;
20MnCr5 0.17-0.22; 1.10-1.40; 0.15-0.40; 1.00-1.30; 0.03; 0.03
20MnCrS5 0.17-0.22; 1.10-1.40; 0.15-0.40; 1.00-1.30; 0.20-0.03; 0.03

 

[TVP]

Peter,

The E is indicating that the material/part has been case hardened. E and V are informally placed at the end of a steel designation to indicate the following:

E = Einsatzgehärtet = Case Hardened
V = Vergütet = Quenched and Tempered

I use the term informally because I have never seen this explicitly stated in a DIN standard, although it is somewhat commonly used in German-speaking countries.

 

[unclesyd]

PeterCharles,

Sorry about that and I thank TVP for setting me straight.

 

[PeterCharles]

Thank TVP

Peter