The information here is aimed at aimed at simplifying, improving and boosting the efficiency of the welding process. It offers good advice on preheat and interpass temperatures, heat input, welding consumables, shielding gas and a great deal more. The aim is to enable every user to gain full benefit of the unique properties of Weldox and Hardox.

Preheat and interpass temperatures

The right preheat and interpass temperature is important in order to avoid hydrogen cracking.

Influence of alloying elements on the choice of preheat and interpass temperatures

A unique combination of alloying elements optimizes the mechanical properties of Weldox and Hardox. This combination governs the preheat and interpass temperature of the steel during welding, and can be used to calculate the carbon equivalent value. The carbon equivalent value is usually expressed as CEV or CET in accordance with the equations below.

The alloying elements are specified in the inspection certificate of the plate and are stated in percent by weight in these formulas. A higher carbon equivalent usually requires a higher preheat and interpass temperature. Typical values of carbon equivalents are given in our product data sheets.

Preheat and interpass temperatures, equation

Preheat and interpass temperatures, equation