Reduce silicon content

[Pravin G]

Dear Expert

Welding application: compressor piping
Process: GMAW 1.2mm ER70S-6
Welding issue: silicone contamination after welding

How can I reduce the silicon content?
Any special method or consumable which can solve this issue?

Kindly advice.

Pravin Poornachandran
Singapore

Sent from my iPhone

[Ahmad el-sharkawy]

can you send chemical composition of piping and welding electrode also? and tell us what is problems and percent of silicon at weld metal?

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WITH MY BEST WISHES

AHMED ELSHARKAWY
QA/QC ENGINEER
DIPLOMA DEGREE IN WELDING ENGINEERING.
CERTIFIED WELDING INSPECTOR " CWI " 14072901.
ASNT LEVEL II " RT&VT&UT&PT&MT"
IRECA CERTIFIED LEAD EDITOR ISO 9001/2008.

PREPARING MASTER DEGREE IN WELDING ENGINEERING.

[Kannayeram Gnanapandithan]

change over to another consumable manufacture

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

On Wed, Jun 17, 2015 at 1:58 PM, Kannayeram Gnanapandithan <kgpan...@gmail.com> wrote:

is it like a slag?? at random

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

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[meisam shokri arfaei]

In the first step you have to investigate the root cause of the high Si content. Is it just slight percentage from the base material or consumable or etc, or is it higher percentage caused from grinding remain or etc.

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M. Shokri Arfaei

ISA-ISTS - Metallurgy Lab. Manager

ASNT NDT Level III

International Welding Engineer

Tel.: +98 21 66282127

Fax: +98 21 66282779

Mob.:+98 912 1394023

[Anup N K E]

Replace ER 70S-6 with ER70S- 3 GMAW filler wire. Silicon content is 0.45 % to 0.75% for ER70S-3  and 0.8 % to 1.15 % for ER 70S- 6.

This is as per Aramco recommendation.

Regards,

Anup

[Srini Vasan]

Guys I face high silicon content in ER70S-3 with high rejection repair rate,after changing of ER70S-6 we reduce repair rate.better purchase different manufacturer,and verify purging gas purity.

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With Best & Regards

N.Srinivas,

Welding Inspector,

0561198050,0537812787

Al-Khobar.