4130 to Carbon steel meeting impact requirements

[newweldeng09]

I am qualifying a welding procedure to weld a 4130 nozzle to a forged carbon steel case in production. The min. tensile requirement shall be 70 ksi and impacts shall be tested in weld metal and 4130 to MDMT of +20F. I plan on using a -20F certified FCAW and GTAW carbon steel wire and PWHT at 1150F. (Both base materials were tempered at 1200F). I am required to meet 37/25 for HAZ in the 4130 HAZ. Will this PWHT yield these types of impact results?

 

[metengr]

If the 4130 was supplied as either quenched and tempered or normalized and tempered yes, you should meet the CVN requirement at 20 deg F with PWHT at 50 deg F below the tempering temperature.

 

[newweldeng09]

Thanks. The 4130 is supplied quench and tempered.