|
Acier : diagramme de Smith
Quelques valeurs des tensions admissible à la fatigue d'aciers standards.
Les valeurs a sont données selon les résultats d'essais de limite de
fatigue (1 e7). ( Courbes de Wohler )
Croquis
Equation
Sm = ( Smax + Smin ) / 2
Tabelle
N°
|
Description
|
État
|
|
Traction
|
Torsion
|
Flexion
|
Remarques
|
|
|
|
S02 |
Sb |
E |
G |
mu |
Sda |
Sdp |
Sdff |
Tta |
Ttp |
Ttf |
Sba |
Sbp |
Sbf |
|
|
|
|
[N/mm2] |
[
- ] |
[N/mm2] |
[N/mm2] |
[N/mm2] |
|
1.2067 |
100Cr 6 |
Etiré |
|
775 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.2067 |
100Cr 6 |
Recuit |
|
650 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.2210 |
115CrV3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.7139 |
16MnCrS5 |
Cémenté à coeur, < dia. 11 |
635 |
880 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.7139 |
16MnCrS5 |
Cémenté à coeur, < dia. 30 |
590 |
780 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.7139 |
16MnCrS5 |
Cémenté à coeur, < dia. 63 |
440 |
640 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.7131 |
16MnCr5 |
|
600 |
800 |
210000 |
|
0.30 |
360 |
600 |
600 |
230 |
350 |
350 |
400 |
670 |
840 |
|
1.8519 |
31CrMoV9 |
Nitruré |
800 |
1000 |
210000 |
|
0.30 |
450 |
800 |
800 |
300 |
480 |
480 |
500 |
800 |
910 |
|
|
31CrAlMo7V |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.7225 |
42CrMo4 |
|
900 |
1100 |
205000 |
|
0.30 |
400 |
700 |
900 |
260 |
400 |
400 |
450 |
770 |
1000 |
|
1.7103 |
67SiCr5 |
Dur à ressort |
1350 |
1500 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.0737 |
9SMnPb36 |
|
260 |
500 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Ac52.3K |
|
|
520 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.0308 |
Ac35 |
Livraison : étiré à froid |
|
440 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.0309 |
Ac35.4 |
Livraison : traité NBK |
235 |
350 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1.1191 |
Ck45 |
|
280 |
500 |
|
|
|
180 |
|
|
|
|
|
240 |
|
|
|
1.1191 |
Ck45 |
Trempé revenu |
320 |
550 |
|
|
|
|
|
|
|
|
|
290 |
|
|
|
1.2380 |
X220CrVMo13-4 |
Trempé revenu |
2050 |
2350 |
196000 |
80000 |
|
850 |
|
|
|
|
|
|
|
|
K190 |
|
|
Ra = 0.2 mu ( N4 ) |
2050 |
2350 |
|
|
|
880 |
|
|
|
|
|
|
|
|
|
|
|
Ra = 0.8 mu ( N6 ) |
2050 |
2350 |
|
|
|
730 |
|
|
|
|
|
|
|
|
|
|
|
Ra = 1.6 mu ( N7 ) |
2050 |
2350 |
|
|
|
570 |
|
|
|
|
|
|
|
|
|
1.4305 |
X8CrNiS18-9 |
|
190 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Inox |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
GGG-40 |
|
280 |
400 |
|
|
|
130 |
180 |
280 |
100 |
150 |
230 |
180 |
260 |
400 |
|
0.7070 |
GGG-70 |
|
500 |
700 |
185000 |
|
0.30 |
210 |
380 |
500 |
200 |
340 |
400 |
350 |
600 |
690 |
|
1.0037 |
Ac37 |
|
240 |
370 |
210000 |
|
0.30 |
170 |
240 |
240 |
110 |
140 |
140 |
190 |
320 |
340 |
|
1.1121 |
Ck10 |
|
250 |
420 |
210000 |
|
0.30 |
190 |
250 |
250 |
130 |
150 |
150 |
220 |
350 |
350 |
|
1.0601 |
Ck60 |
Amélioré |
580 |
850 |
210000 |
|
0.30 |
340 |
450 |
580 |
200 |
260 |
260 |
400 |
600 |
600 |
|
|
X3NiCoMoTi18-9-5 |
Traîté |
1815 |
1860 |
193000 |
72000 |
|
735 |
|
|
|
|
|
|
|
|
W720 |
|
|
Ra = 0.2 mu ( N4 ) |
1815 |
1860 |
|
|
|
700 |
|
|
|
|
|
|
|
|
|
|
|
Ra = 0.8 mu ( N6 ) |
1815 |
1860 |
|
|
|
920 |
|
|
|
|
|
|
|
|
|
|
|
Ra = 2.6 mu |
1815 |
1860 |
|
|
|
900 |
|
|
|
|
|
|
|
|
|
|
AlZnMgCu1.5 |
|
480 |
530 |
72000 |
27000 |
|
|
|
|
|
|
|
110 |
|
|
Perunal-215 |
|
AlMgSi1 |
|
250 |
310 |
69000 |
26000 |
|
|
|
|
|
|
|
80 |
|
|
Anticorodal |
|
AlCuSiMn |
|
380 |
450 |
73000 |
28000 |
|
|
|
|
|
|
|
100 |
|
|
Avional |
|
EN AW-7010 |
|
520 |
590 |
72000 |
|
|
|
|
|
|
|
|
120 |
|
|
Alu
Contal |
|
6Al-4V |
|
830 |
900 |
114000 |
41000 |
|
500 |
|
|
|
|
|
|
|
|
Titane |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|