Dear Pgoswami,
As per SEC IX- 2007; QW/QB-422 SA 210 A-1 comes under Pno:1 Gr 1 and I had referred SEC II part A and found that there is no Molybenum in it. Could you please verify it? Regards Ilangkumaran
--- On Wed, 7/6/11, pgoswami <pgoswami@quickclic.net> wrote:
From: pgoswami <pgoswami@quickclic.net>
Subject: [MW:11596] RE: 11595] E7018-A1 Electrod
To: materials-welding@googlegroups.com
Date: Wednesday, July 6, 2011, 5:39 AM
Hi Zakaria, E-7018-A1 is C-0.5 Mo electrode while E-7018 is just C-Mn electrode. The base metals are A 210Gr A1(C-0.5Mo, Sec IX-P3 material) and P11(1 or 1.25 Cr- 0.5 Mo), P4) material. So for room temperature tensile, high temperature Creep properties, E-7018-A1 would be the minimum requirement as it meets all the room temperature tensile strength and elevated temperature creep strength of the leaner alloys (P3). See Sec-II, Pt-C, SFA 5.5, Table-2 (for C-Mo electrodes, E-7018-A1) and SFA 5.1, Table-7 for C-Mn(E-7018) electrodes. You should not replace E-7018-A1 with E-7018. This would endanger the weld and make it prone to failure in service. Thanks. Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist & Consultant Ontario,Canada. Hi All, In our boiler project we have to weld socket tube A210 Gr A1, 38 mm diameter , 4 mm thick to collector P11 material thick , according client WPS we have to weld by E7015-A1. What's the difference between EXXXX and EXXXX-A1 May E7018 substitue E7015-A1 ? Kind regards -- زكرياء غراب
GHRAB Zakaria
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