Commonly used materials approximate limit strength

Favorite Print

materials	Fatigue and compressive limit	Bending fatigue limit	Reverse fatigue limit	Pull pressure pulsation fatigue limit	Bending pulse fatigue limit	Reverse pulse fatigue limit
Structural steel	≈0.3σ_b	≈0.43σ_b	≈0.25σ_b	≈1.42σ_-11	≈1.33σ_-1	≈1.5τ_-1
Cast iron	≈0.225σ_b	≈0.45σ_b	≈0.36σ_b	≈1.42σ_-11	≈1.35σ_-1	≈1.35τ_-1
Aluminum alloy	≈σ_b/6+73.5MPa	≈σ_b/6+73.5MPa	≈（0.55～0.58）σ_-1	≈1.5σ_-11
Structural steel	≈0.3σ_b	≈0.43σ_b	≈0.25σ_b	≈1.42σ_-11	≈1.33σ_-1	≈1.5τ_-1
Cast iron	≈0.225σ_b	≈0.45σ_b	≈0.36σ_b	≈1.42σ_-11	≈1.35σ_-1	≈1.35τ_-1
Aluminum alloy	≈σ_b/6+73.5MPa	≈σ_b/6+73.5MPa	≈（0.55～0.58）σ_-1	≈1.5σ_-11