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eng.steel-temperature-fire-ISO834 Calculator
Calculates steel temperature rise in fire exposure using the ISO 834 standard fire curve and section factor (Hp/A). Steel loses 50% of its yield strength at approximately 550°C — fire protection maintains steel below this critical temperature for the required period.
Inputs
T Min
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
A M M2 M3
A multiplier applied in the calculation.
Ksh
A multiplier applied in the calculation.
Results
ISO 834 gas temperature (°C)
The value at the specified point or condition.
estimated steel temperature (°C)
The value at the specified point or condition.
section factor Am/V (m⁻¹)
A dimensionless multiplier applied in the calculation.
fire resistance
Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.
ISO 834 T_gas = 20 + 345·log₁₀(8t+1)
Reference formula or conversion factor shown for context.
Am/V guide
Reference formula or conversion factor shown for context.