EN 10277-4 standard

W.NR.: 1.7139

Special alloy case-hardening steel

heat analysis according to the EN 10277-4 standard

  C % Si % Mn % P % S % Cr %
From 0,14 1,00 0,020 0,80
To 0,19 0,40 1,30 0,025 0,040 1,10

according to the EN 10277-4 standard

Thickness    mm Soft annealed* + peeled rolled
(+A +SH )
Soft annealed* + cold drawn
( +A+C )
Hardness maximum values  

HB

Hardness maximum values  

HB

≥5≤10 260
>10≤16 250
>16≤40 207 245
>40≤63 207 240
>63≤100 207 240

*  Delivery condition: subjected to a softening treatment according to the maximum hardness prescription.

Improved machinability:
Upon request it can be supplied with improved machinability with Pb (lead) addition, for example
Pb=0,15%÷0,35%

Weldability:
It is a MnCr alloy steel, easily hot machinable and weldable.

Hardenability:
It has a low hardenability and therefore it can show good core features till thicknesses of about 20 mm.

Notes:

CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):

UNI 7846 EN 10084   DIN 17210 ISO 683-11 AFNOR 35-551
16MnCr5 16MnCrS5  16MnCrS5  16MnCrS5  16MC5

16MnCrS5.pdf