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4130 Postheating

4130 Postheating

4130 Postheating

(OP)
Is post heating mandatory to be done on 4130 material. We are required to meet hardness of 250 Hv10 and every weld would be subjected to PWHT. Thickness range - 0344" - 1.88". Weld consumable - ER100S-G, E101T1-GH4.
If yes then at what temperature and how much time.

RE: 4130 Postheating

To meet the hardness requirement PWHT would be necessary on material 1/2" or greater in thickness. You would find this out when you qualify a WPS with hardness testing.

The PWHT temperature would be 50 deg F below the original tempering temperature of the 4130 if it was supplied as Q&T or N & T.

RE: 4130 Postheating

Time is 1 hour per inch of weld deposit thickness.

RE: 4130 Postheating

(OP)
I meant preheat maintenance after completion of welding before PWHT

RE: 4130 Postheating

There is no preheat maintenance after welding is completed. You cool and apply PWHT if required.

RE: 4130 Postheating

(OP)
Thanks mentengr for the help.

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