EN 10277-3 standard

W.NR.: 1.0765

High machinability steel for direct hardening

heat analysis according to the EN 10277-3 standard

C % Si % Mn % P % S % Pb %
From 0,32 1,30 0,10 0,15
To 0,39 0,40 1,70 0,06 0,18 0,35

according to the EN 10277-3 standard

Thickness
mm
Rolled + peeled rolled
( +SH )
Cold drawn
( +C )
hardness HB Rm (MPa) Rp0,2  minimum Rm (MPa) A5 %
(MPa) minimum
≥5≤10 500 da 660 a 960 6
>10≤16 440 da 620 a 920 6
>16≤40 da 166 a 222 da 560 a 750 390 da 600 a 900 7
>40≤63 da 166 a 219 da 560 a 740 360 da 580 a 840 8
>63≤100 da 163 a 219 da 550 a 740 340 da 560 a 820 9

* Delivery condition: as rolled.

Machinability:
This steel grade generally shows a quite good machinability on machine tools; machinability decreases with the increase of carbon, silicon and manganese content.

Weldability:
Due to the high sulphur and phophorus content free-cutting steels for direct hardening are not recommended for welding.

Notes:

CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):

UNI 4838 AFNOR 35-562 EN 10087
 CF 35 SMnPb 10 35 MF 6 +Pb  36SMnPb14

36SMnPb14.pdf