EN 10277-3 standard

W.NR.: 1.0718

High machinability steel not destined to heat treatment

heat analysis according to the EN 10277-3 standard

C % Si % Mn % P % S % Pb %
From 0,90 0,27 0,20
To 0,14 0,05 1,30 0,11 0,33 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≤10 440 da 510 a 810 6
>10≤16 410 da 490 a 760 7
>16≤40 da 112 a 169 da 380 a 570 375 da 460 a 710 8
>40≤63 da 112 a 169 da 370 a 570 305 da 400 a 650 9
>63≤100 da 107 a 154 da 360 a 520 245 da 360 a 630 9

* Delivery condition: as rolled.

Machinability:
This steel grade is marked by a good machinability on machine tools and by an easy fragmentation of chips.
In order to further improve its machinability, this steel grade can be supplied upon request with Te (tellurium) and Bi (bismuth) addition.

Weldability:
Due to the high sulphur and phophorus content free-cutting steels not destined to heat treatment are not generally recommended for welding.

Notes:

CORRESPONDENCE WITH OTHER STANDARDS (purely as an indication):

UNI 4838 DIN 1651 AFNOR 35-561 ISO 683-9 EN 10087
 CF 9 SMnPb 28  9SMnPb28  S 250 Pb 11 SMnPb 28  11SMnPb30

11SMnPb30.pdf