Estimate continuous cooling transformation (CCT) cooling times for t8/5 based on heat input, preheat, and plate thickness per EN 1011-2
Input Parameters
Results
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Cooling Time t8/5
s
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Avg Cooling Rate (800-500°C)
°C/s
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Hardening Risk
Note: Cooling time t8/5 is the time to cool from 800°C to 500°C. This range determines final microstructure. Short t8/5 = martensite risk, long t8/5 = soft microstructure.
Reference
EN 1011-2 t8/5 formulas:
2D (thin): t8/5 = (4300-4.3T0)*10^5 * Q^2/d^2 * [1/(500-T0)^2 - 1/(800-T0)^2] * F
3D (thick): t8/5 = (6700-5T0) * Q * [1/(500-T0) - 1/(800-T0)] * F
Q = heat input (kJ/mm), T0 = preheat (°C), d = thickness (mm), F = joint factor