Machinery's Handbook, 31st Edition
Stresses in Springs
311
220 210 200 190 180 170 160 150 140 130 120 110 100
MUSIC WIRE QQ-Q-470, ASTM A228
Light Service
Average Service
Severe Service
90 80
Wire Diameter (inch)
Fig. 2. Allowable Working Stresses for Compression Springs—Music Wire a 160 150 140 130 120 110 100 Light Service Oil-tempered Steel Wire QQ-W-428, Type I; ASTM A229, Class II Average Service Severe Service
90 80 70
Wire Diameter (inch)
Fig. 3. Allowable Working Stresses for Compression Springs—Oil-Tempered a 190 180 170 160 150 140 130 120 110 Light Service Chrome-silicon Alloy Steel Wire QQ-W-412, comp 2, Type II; ASTM A401 Wire Diameter (inch) Average Service Severe Service Fig. 4. Allowable Working Stresses for Compression Springs—Chrome-Silicon Alloy Steel Wire a
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