EN 10277-3 standard

W.NR.: 1.0727

High machinability steel for direct hardening

heat analysis according to the EN 10277-3 standard

C % Si % Mn % P % S %
From 0,42 0,70 0,15
To 0,50 0,40 1,10 0,06 0,25

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≤10 570 da 740 a 980 5
>10≤16 470 da 690 a 930 6
>16≤40 da 175 a 225 da 590 a 760 400 da 640 a 880 7
>40≤63 da 172 a 216 da 580 a 730 380 da 610 a 850 8
>63≤100 da 166 a 211 da 560 a 710 340 da 580 a 820 8

* 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):

ISO 683-9 DIN 1651 EN 10087
 46 S 20 45S20  45S20

46S20.pdf