Skip to main content

[MW:1796] Re: Query on SMAW electrode selection for API 5L X65

By Materials & Welding
Hi, pls note the following applications;
Mainline Welding:
 

Steel Grade

Root Pass

Hot Pass

Filling

Cap

 

 

 

 

 

X42/X52

Pipeweld 6010

Pipeweld 7010

Pipeweld 7010

Pipeweld 7010

X60/X65

Pipeweld 6010

Pipeweld 8010

Pipeweld 8010

Pipeweld 8010

X70

Pipeweld 6010

Pipeweld 9010

Pipeweld 9010

Pipeweld 9010

 

 

 

 

 

 


 
Weld area strengths and properties should be observed. So we will focus on  "Total Weld Metal Area" and also HAZ for the required
--- On Sun, 22/3/09, ARI <ariv2k@gmail.com> wrote:
From: ARI <ariv2k@gmail.com>
Subject: [MW:1792] Re: Query on SMAW electrode selection for API 5L X65
To: materials-welding@googlegroups.com
Date: Sunday, 22 March, 2009, 9:43 AM

Hi,
 
Using E6010-G would keep the dilution level as minimum, but at the same time, it wouldn;t give the UTS equal to Parent metal UTS for API5L X65?

Regards,
 
Ari
 
On 3/21/09, babu k <kbabupsg@gmail.com> wrote:

Hi,
 
Put it in simple words, the use of E6010-G is to keep the dilution level to be minimum ; 
 
Thanks & Regards,
 
K.Babu
Singapore
 

 
On Thu, Mar 19, 2009 at 6:15 PM, Ari <ariv2k@gmail.com> wrote:

Dear All,

Can you please advise, why E6010-G (root) & E-7010-P1 (hot/fill) are
used for Oil pipelines(Sour) containing parent material of API 5L X65.
Since these type of PQR/WPS are being approved by most of the
Company.

As, X65 has an YS of 65,000 Psi, whilst the electrodes used E6010 has
YS of  48,000 Psi, and E-7010-P1 has YS of 60,000 psi. By using both
of these electrodes the weld metal strength would not exceed  YS
60,000 psi.

How its acceptable to keep the low weld metal strength(<YS 60,000 Psi)
than the parent metal (= YS 65,000Psi).

Thy suppose to use E8010 for root and E8018 for hot/fill, for API 5L
X65 materials, which only would give the equivalent WM strength.

As we all know that overmatching weld metal strength causes gross
section yielding in the pipe, whereas Undermatching weld metal
strength will cause straining of the weld.

Your advise/suggession, based on experience is appreciated.

Regards,

Ari






New Email addresses available on Yahoo!
Get the Email name you've always wanted on the new @ymail and @rocketmail.
Hurry before someone else does
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---

Comments

Post a Comment

Popular posts from this blog

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

By Materials & Welding
Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...
Post a Comment
Read more