Date: November 26, 2008
Dear Mr. Bathula Raghuram & friends,
Re: fabrication of I- Girder & Box Girder made of steel of Grade Designation E 410 (Fe 540) of IS 2062: 2006, having plate thickness range 10 m.m. to 36 m.m.
I shall be highly obliged if you kindly help me in selection of welding consumables for the above Steel grade:-
The Chemical Composition of steel:
| Grade Designation | C | Mn | S | P | Si | Carbon Equivalent (CE),Max | Method of deoxidationn |
| E 410 (Fe 540) | 0.20 | 1.60 | 0.045 | 0.045 | 0.45 | 0.44 | Semi-killed or killed |
(Microalloying elements like Nb, V ,Ti and B shall be added singly or in combination. Total microalloying element shall not be more than 0.25)
Mechanical Properties of steel:
| Grade Designation | Tensile Strength R m Min MPa | Yield Stress, R eH Min MPa | Percentage Elongation, A at Gauge Length, L0 5.65 √ So Min | Internal Diameter Min | Charpy V- Notch Impact Energy Min J | ||||
| | < 20 | 20-40 | 40 > | ≤ 25 | >25 | Room Temp. | - 20 | ||
| E 410 (Fe 540) | 540 | 410 | 390 | 380 | 20 | 2t | 3t | 50 | 25 |
For the above welding I have provisionally selected following welding consumables for various welding processes:-
Electrode for SMAW: – E 8018 G of AWS A5.5
Solid wire for GMAW (with Co2 Shielding): – ER 80 S-G of AWS A 5.28
Flux-wire combination for SAW: – F8A2 – EA2-A2 of AWS A5.23 alternatively F 7A4 – EH14 of AWS 5.17
I shall be obliged if you kindly send me your suggestions/ comments on the above selection of electrode, wire & SAW Flux and also let me know some reputed compatible product/brand name of the same.
With regards,
Yours Sincerely,
Soumitra Kumar De
48/19,
Tel: (033) 2424-5386; Fax: (033) 2424-4571; Cell: +91 94330-15347
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Bathula Raghuram (Mumbai - PIPING)
Sent:
To: materials-welding@googlegroups.com
Subject: [MW:1355] RE: 1354] RE: Buried Fittings
It could be poor design, why you need flanges in a buried pipeline?
Most cost effective will be coal tar wrapping
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Fly Yalung
Sent:
To: materials-welding @google
Subject: [MW:1354] RE: Buried Fittings
| Dear Gentlemen, Good day to everyone. I have one dilema regarding some fittings to be welded to a pipe and will be buried 1.5 meter below grade surface. Is this right thing to done? If correct what is the most cost effective protection that we can do to protect the buried fittings(example- Flanges). Best regards, Fly L. Yalung Material Egineer M. A. Al-Kawari Est. K.S.A. |
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