PWHT & PreHeat of S355JR+N

Date 11-19-2018 01:11

I didn't find an exact match between S355Jr+N and an ASTM specification.

You could use the CE formula found in the Annex of AWS D1.1. The formula takes into consideration the chemistry of the base metal, the level of hydrogen control, and the degree of restraint. Use your CMTR as your starting point.

Al

By UmairIkram Date 01-18-2019 07:15

Could you just let me know that whether we need to Preheat and Post heat on S355JR+N

By 803056

Date 01-18-2019 22:51

Not without a referencing code or base metal thickness.

Al

By UmairIkram Date 01-19-2019 03:51

S355JR+N steel plates Metal thickness is between 12mm to 25mm i just wanna know if there's any standard related to Preheat & PWHT (required for WPS & PQR) structural welding Code

By UmairIkram Date 01-19-2019 03:54

& I dont wanna know with the manufacturing point of view i wanna know regarding to weldability & its preheat temperatures

By 803056

Date 01-19-2019 17:27

The carbon content is less than 0.3% and it is equivalent to an ASTM A572 Gr 50. I would make sure the temperature is above 25 degrees C for the material up to 15 mm thick and 75 degrees C for over 15 mm up to 25 mm thick.

Al