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din25201
Fatigue Stress Amplitude Curve (DIN 25201)
Fatigue stress amplitude σ_a vs. bolt size M3-M48 for DIN 25201 bolted joints. σ_A ≈ 60 MPa is the rolled-thread fatigue limit (2×10⁶ cycles), ~30% higher than cut threads.
Standard Condition Curve
Curve variants across specs × materials. Register to view.
Standard Condition Curve
| Parameter | Value | Unit |
|---|---|---|
| Material | 42CrMo4 | — |
| nominal_dia | M12 | — |
| thread_type | rolled | — |