Interpass Temperature For Carbon Steel Welding. As shown in Fig. For carbon steels the maximum interpass temperature is around 600 deg F.
Up to ½ inch 12 mm thickness. But weld metal cracks were observed in the non-preheat condition while they were stopped at 50Ž preheating. 1 CEIIW is a preferable index for carbon steels and carbon manganese steels but absolutely unacceptable for low-carbon low-alloy steels.
Up to ½ inch 12 mm thickness.
Pcm is suitable for the steels except steel. INTERPASS TEMPERATURE When welding alloys which do not contain ferrite a lower interpass temperature is preferred which lowers thermal stresses. Additionally higher interpass temperatures will generally pro-vide a finer grain structure and improved Charpy V notch toughness transition temperatures. And in most cases preheating to 300F will costs you more than double that of preheating to 150F.