Page 289 - Analysis and Design of Machine Elements

Table 10.1 Shaft materials and their mechanical properties [1, 2, 4, 7, 8]. Shafts 267
Heat treatment Hardness Ultimate strengths Yield strength Endurance limit in bending Endurance limit Allowable bending Applications

Materials designation in shear stress
b s −1 −1 [ ]
−1
ASTM/AISI
No. BS No. GB No. ISO No. HBW MPa
steels 1020 S235JR Q235A Fe360A 120 440 240 180 105 130 Low loads,
unimpor-
Carbon tant
applica-
tions
1045 060A42 45 C45E4 N 195 600 300 240 140 172 Most
C45E QT 236 650 360 270 155 194 widely used
5120 527A20 20Cr 20Cr4 C 56∼62 850 550 375 215 230 High
Q HRC 650 400 280 160 170 strength
T 650 400 280 160 170 and
toughness
applica-
tions
Alloy steels 530M40 applica-
5140 530A40 40Cr 41Cr4 QT 264 750 550 350 200 214 Heavy load
tions
280 296
640M40
QT 285
1000 800 485
Important
40CrNi
3140
shaft
905M39 38Cr 41CrAl QT 229 990 850 495 285 237 High
MoAl Mo74 strength,
high wear
resistance
410 410S21 12Cr13 X12Cr13 QT 202 600 420 275 155 168 Corrosion
environ-
ment
Stainless steels 304 X5CrNi 06Cr19 X5CrNi A 568 276 228 132 152 Corrosion
18-10
Ni10
18-10
environ-
ment
X10CrNi 12Cr18
302
18-8 Ni9 X10CrNi Q 192 550 220 205 120 145 High and
low tem-
18-8
perature,
corrosion
environ-
ment
Nodular iron 120-90-02 800/2 QT800-2 800-2 290 800 480 290 250 structures
Complex
QT600-3 600-3
233
80-60-03
600/3
420 215
185
600
Note: N = normalizing, T = tempering, C = Carbonizing, Q = Quenching, A = Annealing.