Suitability of PWHT on ER309L Buttering over CS

kunalen...@gmail.com

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Jul 22, 2020, 8:04:50 AM7/22/20

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Dear Experts

Need your expert advice that we have a joint of CS to SS, PWHT is applicable for CS. So planned to go for the buttering with ER309L & then PWHT prior welding with SS. Please advise does ER309L has any adverse effect on it if comes under the PWHT cycle applicable for P1 material.

Kannayeram Gnanapandithan

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Jul 22, 2020, 9:42:26 AM7/22/20

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309 weld metal may not be suitable for temperature above 370°C. Due to sigmaphase formation

On Wed, 22 Jul 2020 5:34 pm , <kunalen...@gmail.com> wrote:

Dear Experts

Need your expert advice that we have a joint of CS to SS, PWHT is applicable for CS. So planned to go for the buttering with ER309L & then PWHT prior welding with SS. Please advise does ER309L has any adverse effect on it if comes under the PWHT cycle applicable for P1 material.

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TDK YOKESH

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Jul 22, 2020, 12:04:07 PM7/22/20

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You can use Inconel filler for buttering to avoid intermetallic phase formation during pwht.

On Wed, Jul 22, 2020, 4:04 PM <kunalen...@gmail.com> wrote:

Dear Experts

Need your expert advice that we have a joint of CS to SS, PWHT is applicable for CS. So planned to go for the buttering with ER309L & then PWHT prior welding with SS. Please advise does ER309L has any adverse effect on it if comes under the PWHT cycle applicable for P1 material.

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pgos...@rogers.com

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Jul 22, 2020, 5:04:23 PM7/22/20

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Hi Kunalenfield,

You may use 309L for buttering on carbon steel and subsequent PWHT, provided the design conditions do not exceed the recommendations of API RP-582 as below. A buttering PQR should be established according to ASME Sec-IX , QW -283 . Typical buttering thickness to lesson the effects of welding on the buttered surface should be 3/16”. Read the details of QW-283 to establish a buttering followed by welding on the same test coupon.

Thanks.

P.Goswami.P.Eng, IWE.

Independent & Consulting Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

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