Welding of SA 240 TP 410S material.

[P.Rao]

Dear all,

Can any body share the experience in welding of SA240 TP410 Material.

I have a Vessel consists SA387 Gr.11 Cl.2 material cladded with SS410S.

Internal Piping material : SS410S thickness 10-15mm.

Construction Code : ASME SEC VIII Div.1.

Welds in SS410S will under PWHT of low Low alloy steel.

Need guidance in Preheat & interpass temperature of SS410 material welding (Consumable selected for welding of SS410S is 309L type).

regards

P.Rao

[james gerald]

Rao,   410 material is martensitic stainless steel and 410S material is Ferritic stainless steel. These are basically 13CR stinless steel selected for certain service requirement. The P.No of 410S is P.No.7.   The preheat recommended for 410S is 10degC and the Interpass temperature is 260degC. It can be welded using E309L/Ni based electerode / 410 electrode. Normally PWHT can be waived if E309L electrode is used.   If you prefer to use 410 electrode, then a preheat of 150degC is recommended and the interpass temperatuure shall be 100 degC higher than the preheat. J.GERALD JAYAKUMAR 00919344954677   --- On Sat, 6/26/10, P.Rao <vasanth...@rediffmail.com> wrote:

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[PB HEGDE]

Hi!

 

As base metal is of LAS ,  req  PWHT at min 650C  , Therefore suitable  consumable for clad restoration of 410 S clad is  E NiCr fe3 or NiCr Mo3

 

Preheat Temp . of base metal for barrier layer is 100 C , (No need of preheating  for subsequent layers.  min ,Interpass temp  is  175 max,  Welding Current – 110-120  Amp for 3 .2 dia electrode.

 

Regards

 

Hegde

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of P.Rao
Sent: Saturday, June 26, 2010 5:21 PM
To: material...@googlegroups.com
Subject: [MW:5751] Welding of SA 240 TP 410S material.

 

Dear all,

--

[Prabhu Kumar L]

Dear Rao,

 

As Mr. Hegde mentioned in the trailing mail, it is suggested to use Ni based filler metals instead of E309L type for welding of SS410S materials. In general, 309 type filler metal should not be used for temperature above 600 Deg. C, due to sigma formation (Brittle phase) in the welds.

 

Basically this electrode shall produce higher ferrite content around 20% in the welds, which will convert into brittle sigma phase when temperature above 500 Deg. C. Sigma phase would reduce the toughness and ductility and will increase hardanability and hardness of the weld metal.

 

In your case, piping (SS410S) and complete vessel undergoes PWHT as per Code requirement and hence it is preferred to use ENiCrFe-3 for CR overlay and ERNiCr-3 type filler metal for piping materials.

 

If PWHT can be avoidable for SS410S materials, you can use E309L type filler metal. Refer to API RP582 for recommendation of selection of welding filler metal based on temperature limits.

 

Regards,

 

L. Prabhu kumar,

Sr. Principal Engineer,

 

Equipments & Materials Dept.,

Saipem India Projects Limited,

Nungambakkam High Road, Chennai - 600 034, India.

Tel:+91 44 43906588, Ext.: 588, Fax:+91 44 66840345,

Mobile Ph. No.: +91 9003010978.

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