General Tables

The following tables are given for reference: Table 50.1 Using a Safety Factor of 5—Allowable Working Stress for a Steady or Permanent Working Load Material Type of Stress Tension (t) (MPa) Compression (c) (MPa) Bending (b) (MPa) Shear (MPa) Cast iron 29 83 41–55 27.5 Mild steel 89.5–117 89.5–117 89.5–117 69–117 Cast steel 117–145 117–145 117–145 89.5–117 Steel casting 55–69 83–110 69–96.5 16.5 Rolled copper 41.5 — — — Brass 21 — — — Table 50.2 Allowable Working Stress for a Load Varying from Zero to Maximum Value Material Tension (t) (MPa) Compression (c) (MPa) Bending (b) (MPa) Shear (MPa) Cast iron 19.3 58.6 27.5 24 Mild steel 59.3–78.6 59.3–83 59.3–78.6 45–59.3 Cast steel 78.6–96.5 78.6–96.5 78.6–96.5 59.3–78.6 Steel casting 36.5–55 55–73 45.5–65 32.4–55 Rolled copper 20.7 — — 11.0 Brass 13.8 — — — Table 50.3 Allowable Working Stresses for a Fluctuating Load Producing Equal Stresses in Opposite Directions Material Tension and Compression (MPa) Bending (MPa) Shear (MPa) Cast iron 9.7 13.8 12.0 Mild steel 29.6–39.6 29.6–39.4 22.8–29.6 Cast steel 39.3–48.3 39.3–48.3 29.6–39.3 Steel casting 18.6–27.6 22.8–32.4 15.9–27.6