Materials & Welding

I'm a member of this group and have been following this discussion with some interest. I am attaching a summary of a position on the need for controlling the S level in type 316LN stainless steel that will be autgeneously G.T.A welded in the form of small diameter thin-walled tube. Any comments or feedback is welcomed. I also hope that some of the information that I'm posting will be of value to others. Ed Dalder ----- Original Message ----- From: "John Henning" <jhenning@deltak.com> To: materials-welding@googlegroups.com Sent: Tuesday, September 29, 2009 7:43:31 AM GMT -08:00 US/Canada Pacific Subject: [MW:3371] RE: 3297] 3295] Welding qualification of very low sulfur steels. In the past, super clean steels were investigated by EPRI and others.  It was found that if the sulfur is extremely low, one can experience arc wander and significant difficulty in obtaining a quality weld.  Just a wee bit is good thing from a welding stand point.  I don't ha...

Dear All, We are try to weld a 5mm Strip to a tube of wall thickness 2mm Mild Steel [ O_ ] In this position. We need to weld vertically and from both sides at the same time front and back. Is it ok to do so ? Will there be a problem if we weld both from front and back at the same time ? Is it better to weld one side first then the other ? We are using 1.0 mm solid wire and CO2 as gas. Regards, -- Nimesh S Chinoy --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

Dear Mr Moorthy, Please submit the welding procedure specification (if it exists) and the exact base material analysis from the certificate. I need to know the bead positioning, the heat input and the basematerial analysis of the cracked plate as a minimum. The hardness of the HAZ in the cracked plate can give an indication as well. Regards, Huub. 2009/9/29 bdsathiyamoorthy < bdsathiyamoorthy@gmail.com > Dear All,   I am doing tank construction. I have found some cracks on the pad toe and pad corner. Shell thk 38 mm, pad thk 30 mm and fillet weld size 21 mm. we were controlled everything. (electorde quiver temp. preheat, oven temp. before start welding good cleaning and etc).   Material details :   Shell mat'l  : A537  Pad mat'l   : S275 Gr J   Electrode    : E7018   Pls any one can sugest to me the causes and prevention.   Regards, Moorthy.         --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to mat...

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com   BR From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of rahul.pisat@akersolutions.com Sent: Wednesday, September 30, 2009 1:46 PM To: materials-welding@googlegroups.com ; materials-welding-unsubscribe@googlegroups.com Subject: [MW:3382] try to unsubscribe from this group for this ID   Hello   How to unsubscribe from this forum ?, I would like to unsubscribe from this forum for this email Id? I got a  delivery failure message for the email id mentioned in Group site   Rahul Pisat Engineer - Material Engineer T el:-  +31 79 368 8655 Email :- rahul.pisat@akersolutions.com   Aker Process B.V. , PO Box 5254, 2701 GG  Zoetermeer, The Netherlands H   Houtsingel 5, 2719 EA  Zoetermeer, The Netherlands   (   +31 (0)79 368 8688 7 ...

Hi,   For better achieving impact at -46 Deg.C, E 7016-1 (Root) + E7018-1(Hot, Fill and Cap) also recommended, since both are tested at -45 deg.C.   Note: Check your LAST requirement and choose the consumable accordingly.   Regards, Vasanth From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of amarjit Singh Sent: 29 September 2009 16:13 To: materials-welding@googlegroups.com Subject: [MW:3376] Re: Electrode for LTCS A333Gr6   Dear Kaushik,   SA 333 Gr 6 is generally recommended upto -46 deg C so you can use E7010 for root pass & E7018-1 for filling & capping or for better control you can also use GTAW root   Amarjit singh On Mon, Sep 28, 2009 at 5:58 PM, checks patel < checkspatel@gmail.com > wrote: Dear All,   I have a U/G pipeline of ASTM A 333 Gr.6 (LTCS) for 2 KM.   Which Electrode ...

What type of copper it is, oxygen bearing or oxygen free? It is difficult to weld oxygen bearing copper Some times CuSi type filers are an added advantage due to its fluidity, consult a consumable manufacturer with correct type/grade or UNS# of the material Helium (or He+Ar mixture) can be selected as a shielding gas because; risk of oxide entrapment in the weld pool is greatly reduced and provides deeper penetration Preheating of the base metal is typically required to maintain the base metal at welding temperatures without preheating, the high thermal conductivity of copper results in excessive loss of heat away from the weld zone. -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of gajjalla surya prakash Sent: Wednesday, September 30, 2009 11:47 AM To: materials-welding@googlegroups.com Subject: [MW:3373] filler wire for copper dear all , can any one suggest me the filler wire for GTAW process for weld 12mm t...

CARBON STEEL   -   INPUT DATA   - INCH UNIT METRIC UNIT 1. MATERIAL   : ASTM A515 GR.70   ALLOWABLE STRESS(by B31.3) : 23100.00 Psi 1624.00 ㎏/㎠G 2. CORROSION ALLOWANCE (C) : 0.05 inch 1.30 mm 3. PIPE QUALITY FACTOR(carbon은 1) : 1.00   1.00   4. DESIGN PRESSURE(Kg/cm2G) : .00 Psi 57.00 ㎏/㎠G 5. DESIGN TEMPERATURE( ℃) : .00 75.00 6. FLUID :       -   OUTPUT DATA   -   1. The equation for wall thickness calculation based on ASME B31.3     tm   =   d g √(3P/16SE) + C     where,            tm   :   minimum required wall thickness in   mm.             d g :   inside diameter of gasket for raised or flat face flange or the gasket                   pitch diameter for ring joint and fully retained gasketed flanged              E :   joint efficiency or pipe quality factor              P :   design pressure              S :  ...