"Light Straw Color"

[Yunsok Bang]

Hello. I am one of the welding quality managers who cooperate with representative semiconductor companies. Our customer has their own acceptance criterion that refer some international code such as ASME Section IX, BPE, 31.3, SEMI F81 etc. Recently, one of the related codes was questioned. It refers about the "Light Straw Color" in SEMI F81 regarding to the acceptance criteria of automatic welding surface color. We are using M200 automatic welding machine. There is no included any picture and details of it. Therefore, I wasn't able to find any exact standard of it. How could I verify that criteria. It's surface standard. It's not about the back bead which has certain criterion like AWS D18.2 or ASME BPE.

I would like to get some advices related to this from your various experiences.

Thank you.

[rahul ugale]

Dear all ,

Please comment.

QW-403.6 The minimum base metal thickness qualified

For a WPS where impact test is applicable. As per QW-403.6 The minimum base metal thickness qualified is the thickness of the test coupon T or 16mm whichever less and if T less than 6mm, then 1/2T.

In the scenario, while filling the Weld Deposit range qualification in WPS, How we can enter the data. We can apply for the combination of both processes weld deposit thickness. But how to enter for individual process qualified range.

Ex: 1 ) Base Material Thickness – 53 mm  GTAW (13mm),SMAW(20 mm) & SAW (20 mm) , So PQR Range is 16 mm – 200 mm, what will be the individual ranges for each process considering QW 403.6

Ex: 2 ) Base Material Thickness – 20 mm GTAW (8 mm) & SMAW (12 mm) So PQR Range is 16 mm – 40 mm, what will be the individual ranges for each process considering QW 403.6

Regard,

Rahul

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[Jenish Mistry]

Hi,

There are two scenarios which are described below .

1. Base metal Qualification 

For Base metal Qualification as you attached snap & QW : 451 you get Range of base metal  thickness qualified.

2. Weld metal Qualification

Please refer QW -451 where code mentioned max. Weld metal qualified on your each process.Please refer attached snap for your reference.

I hope your doubts are clear now.

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Thanks for your best support.

Regards,

Jenish Mistry

09033476117

[Kannayeram Gnanapandithan]

only for base metal

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Thu, Jan 27, 2022 at 11:33 AM rahul ugale <rahulu...@gmail.com> wrote:

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