SA387 Gr.11 Cl.2 material welding.

PAMULA

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Dec 14, 2009, 8:26:16 AM12/14/09

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Dear all,

Can any body have experiance on welding of SA387 Gr.11 Cl.2 (1 1/4Cr-1/5 Mo)material with E8018-B3L, ER80S-B3L, EB3 type welding consumables(2 1/4 Cr-1Mo).

Higher composition consumables (B3L) are recommended?

Is there any change in PWHT is required as compared to standard PWHT cycle for SA387 Gr.11 Cl.2 material as per ASME Div.1.

Pl. share experiance on welding of subject material.

( Design Code : ASME div.1
MDMT : 0 Deg.C
Impact : 50/40)

regards

P.Rao

pgos...@sympatico.ca

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Dec 14, 2009, 2:04:19 PM12/14/09

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Dear Mr Rao,

SA 387 Gr.11 Cl.2 is P,No 4, Gr-1 material and is supplied in Normalized and Tempered condition. Typical UTS range for this steel is (75 to 100 KSi or 515 to 690 Mpa). P-4 material is weldable by 2.25 Cr-1Mo consumable, however one has to take care of the following:-

· The recommended PWHT temperature of two different codes (Sec-VIII,DIV-1 & B-31.1) is shown below for P4 and P5 material. For your scenario, P4 requirement applies to base metal whereas P5 criteria applies to weldmetal.

· Pr Vessel Code- Sec-VIII, DIV-1 specifies the minimum PWHT temperature, fabricator can select higher PWHT temperature provided base metal simulation test coupon or PQR indicates that minimum UTS is met.

· Piping Code-B-31.1 code gives a range, fabricators are advised to stay within this range.

· As you can see from illustrations of B-31.1 the recommended PWHT temperatures for P4 and P5 base metals are overlapping

The recommended PWHT temperature shall be 1260± 10⁰F, which would equally soften weld and HAZ. There may be queries on over softening of P4 base metal. As mentioned above if you have base metal simulation test coupon results @ higher PWHT temperature(as above ot close to that) then you’re safe.

If there are hardness restrictions on weld and HAZ then it should be taken care off during procurement of base metals and welding consumables.You need to ensure that required hardness values are met after PWHT.

PWHT Temperatures:-

ASME –Sec-VIII,DIV-1

· P-No. 4-- 1,200⁰F (650⁰C)

· P-Nos. 5A,--1,250 ⁰F (675⁰C) ,

ASME B-31.1

· P-No.4-- 1,200 ⁰F (650⁰ C) -1,300⁰F(700⁰C)

· P-No-- 5A 1,300⁰F(700⁰C) -1,400 (760⁰C)

Hope it would help you.

Thanks.

Pradip Goswami,P.Eng

Senior Engineer/Specialist(Welding-Metallurgy)

Machine Dynamics & Component Integrity Dept.

Engineering & Training Services Division

ONTARIO POWER GENERATION Inc.

PO Box-2000, RR-55(South)

Nanticoke, Ontario,N0A1L0

Tel:-(519) 587-2201, Ext 3107--in Nanticoke

(416) 231-4111, Ext 5925--in Kipling,Toronto

Fax: (519) 587-6814

Email-prad...@opg.com.

From: pgos...@sympatico.ca [mailto:pgos...@sympatico.ca]
Sent: Monday, December 14, 2009 9:11 AM
To: GOSWAMI Pradip -FOSSIL
Subject: FW: [MW:3835] SA387 Gr.11 Cl.2 material welding.

Date: Mon, 14 Dec 2009 13:26:16 +0000
To: material...@googlegroups.com
Subject: [MW:3835] SA387 Gr.11 Cl.2 material welding.
From: vasanth...@rediffmail.com

Dear all,

Can any body have experience on welding of SA387 Gr.11 Cl.2 (1 1/4Cr-1/5 Mo)material with E8018-B3L, ER80S-B3L, EB3 type welding consumables(2 1/4 Cr-1Mo).

Higher composition consumables (B3L) are recommended?

Is there any change in PWHT is required as compared to standard PWHT cycle for SA387 Gr.11 Cl.2 material as per ASME Div.1.

Pl. share experience on welding of subject material.

( Design Code : ASME div.1
MDMT : 0 Deg.C
Impact : 50/40)

regards

P.Rao

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PB HEGDE

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Dec 14, 2009, 10:37:04 PM12/14/09

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Hi !

Generally SA387Gr11 Cl2 is being welded with EB2 wire and related flux as per manufacturer. And it will give you impact even at minus 18C with PWHt at 705 C for 6 hrs soaking min you get more that 54J

EB3 Not recommended If at all if you want weld with EB3 and suitable flux PWHt should be at 690C for 6 hrs Preferably AC mode

In such case you will get better Impact properties.

However for Better impact You have to restrict Interpass temperature ,Preheating, post heating, and Bead thk (say 2-2.5mm max)

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of PAMULA
Sent: Monday, December 14, 2009 6:56 PM
To: material...@googlegroups.com
Subject: [MW:3835] SA387 Gr.11 Cl.2 material welding.