Carbon Equivalent Calculator
Calculate the IIW carbon equivalent (CE) for steel and assess weldability from chemical composition.
How to Use the Carbon Equivalent Calculator
- Enter the weight percentages of each alloying element from the material certificate.
- Leave elements at 0 if not present in the alloy.
- Click Calculate to get the CE value and weldability assessment.
Casi d'Uso
- •Assessing weldability of structural and pressure vessel steels.
- •Determining preheat and interpass temperature requirements.
- •Comparing base metal grades for welded fabrication projects.
Formula
CE(IIW) = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15. CE < 0.4: Good; 0.4–0.6: Fair; > 0.6: Poor weldability.
Domande Frequenti
What does carbon equivalent tell you?
CE quantifies the combined hardenability effect of carbon and alloying elements. It predicts susceptibility to hydrogen-induced cracking and guides preheat requirements.
What CE values indicate good weldability?
CE < 0.4 indicates good weldability (no preheat usually needed). CE 0.4–0.6 is fair (preheat recommended). CE > 0.6 indicates poor weldability (strict preheat and low-hydrogen procedures required).
Is this calculator free?
Yes, all OhMyCalc calculators are completely free to use.