1) SMAW-- E7018
2) GMAW -- ER70S-6
3) FCAW -- E71T-1
4) SAW -- EH14 F7A4
Regards
Prem Nautiyal
On Thu, 27 Nov 2008 09:25:36 +0530 materials-welding@googlegroups.com wrote
You should opt for E7018 Electrode for SMAW process and ER70S wire for GMAW process.You should also check what is the actual Carbon Equivalent from the material TC by IIW formula C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15 or else by short formula C+Mn/6.It is preferable if it is between 0.41 to 0.43 and does not cross 0.45.Fully killed steel is preferable.
Regards
Aarpee
On 11/26/08, Polaris
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 ¡Ì So
Min
Internal
Bend
Diameter
Min
Charpy V- Notch
Impact Energy
Min
J
< 20
20-40
40 >
¡Ü 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
Polaris Engineers ( I ) Pvt. Ltd.
48/19, Swiss Park, Kolkata- 700 033.
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: Wednesday, November 26, 2008 8:40 AM
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: Tuesday, November 25, 2008 5:44 PM
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.
PREM S NAUTIYAL
CELL : 9820313278
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