EN 10277-4 standard

W.NR.: 1.7149

Special alloy case-hardening steel

heat analysis according to the EN 10277-4 standard

C % Si % Mn % P % S % Cr %
DA 0,17 1,10 0,020 1,00
A 0,22 0,40 1,40 0,025 0,040 1,30

 

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≤10 270
>10≤16 260
>16≤40 217 255
>40≤63 217 250
>63≤100 217 250

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

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

Hardenability:
It has a medium hardenability and therefore it can show good core features till thicknesses of about 40 mm.

Notes:

CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):

UNI 7846 EN 10084 DIN 17210 ISO 683-11 AFNOR 35-551
20MnCr5 20MnCrS5 20MnCrS5 20MnCrS5 20MC5

20MnCrS5.pdf