Carbon Equivalent and Preheat
CET, CEV and the preheat temperature per Method B come from generally available standard knowledge on EN 1011-2 (Annex C), not from the reference book, and have not been checked against the standard text.
Analysis (mass %, from the material certificate)
Conditions
Approximately valid for CET 0.2–0.5 %, thickness 10–90 mm, HD 1–20 ml/100 g, heat input 0.5–4.0 kJ/mm.
CET
– %
CEV
– %
Preheat temperature Tp
–°C
Disclaimer: All calculation aids, formulas, tables and reference values on this page are for guidance only. They do not replace the applicable standard texts, the material and equipment manufacturers' data, a welding procedure specification, or a case-by-case technical review. Invictix Systems gives no warranty as to accuracy, completeness or currency and accepts no liability for damages arising from their use. Only the applicable standards, manufacturer data and your own production trials are binding.
Order of magnitude from the reference book, no formula
The manuscript gives no CET formula, only order-of-magnitude preheat by plate thickness: for ferritic filler metals (Armox 370T–500T), from room temperature on thin plate up through 50/100/125/150 °C to 175–200 °C at 80–100 mm; for the high-hardness grades (560T, 600T, 620T, Advance), around 100 °C. Rule of thumb from the book: from 440T upward the window runs roughly 100 to 190 °C, narrowing to 100–120 °C for the high-hardness grades.
Manuskript Kap. 6.5, S. 49–50
Calculation aid based on: Reference book, chapter 6.5; EN 1011-2 (unverified). Replaces neither the standard text nor manufacturer data nor a welding procedure specification.