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Raja Adnan
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Join Date: Mar 2015
Posts: 3

How To Remove Maganite During Welding

04/07/2015 6:13 AM

hi guys

Today during welding of plate thickness 20mm gr70 its manganite came so I want to know how we remove manganite during welding and why its come.
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lyn
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#1

Re: How to remove maganite during welding

04/07/2015 9:55 AM

What is manganite?
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Anonymous Poster #1
#3
In reply to #1

Re: How to remove maganite during welding

04/07/2015 11:20 AM

It's the element used when manufacturing dilithium crystal holders. Scotty used to have trouble with these and that is why he often got frustrated when Jim wanted more power. You can find more details if you check the index of your NCC-1701 Operator's Manual.
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IdeaSmith
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#5
In reply to #3

Re: How to remove maganite during welding

04/07/2015 11:44 AM

Reported as good post from Anonymous.

I want the full name exposed to all!

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IdeaSmith
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#2

Re: How to remove maganite during welding

04/07/2015 9:59 AM

http://en.wikipedia.org/wiki/Manganite

Are you saying the Manganite was building while welding?

What is the plate material. Maybe its some steel that has high Manganese content.

I would not try to remove it but find out what material you are welding and decide how to weld it properly.

Start from scratch!

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Original_Macgyver
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Join Date: Jul 2013
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#4

Re: How To Remove Maganite During Welding

04/07/2015 11:34 AM

I'm not sure I comprehend your question?

  1. Is the weld producing Maganite? Manganite?
  2. What does the Mill spec sheet describe as to the steel chemistry?
  3. What does the Mill spec sheet describe as to the welding rod chemistry?
  4. What welding process are you using?
  5. Is the Maganite? Manganite? causing weld issues? Finished product blemish?
  6. Once again you give so little information that your question borders on the ridiculous!
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Whitephone
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Join Date: Jan 2010
Location: Mineral wells Tx
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#6

Re: How To Remove Maganite During Welding

04/07/2015 12:05 PM

Is very easy. You are in India? yes, ofcourse.

Manganite contaminations occur when you are welding and eating mango at the same time.

Solution: Do not eat mango when you are welding.

Note: Mango is great.
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Whitephone
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#7
In reply to #6

Re: How To Remove Maganite During Welding

04/07/2015 12:23 PM

Ok Sorry. Are you welding Inox? Chek your filler metal
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Whitephone
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#8
In reply to #7

Re: How To Remove Maganite During Welding

04/07/2015 1:07 PM

Also check heat input , interpass temperature and cooling temperature.
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classic
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Join Date: Mar 2015
Location: Iraq- hot Middle East
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#9
In reply to #7

Re: How To Remove Maganite During Welding

04/07/2015 4:19 PM

No let it be with Mango..G.A
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spades
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Location: Port Macquarie N.S.W. Australia
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#10

Re: How To Remove Maganite During Welding

04/07/2015 8:40 PM

I suspect that what you are experiencing is the formation of Martensite and Cementite.

I presume by the plate thickness that the weld is multipass, and so dendrite growth is highly likely.

Martensite normally has a fine needle like structure, and forms due to a concentration of Carbon when the outer regions of the HAZ cools from the Austenite state too rapidly to reform to Pearlite. The effect can be reversed by reheating and cooling more slowly.

Cementite has a slightly larger structure and forms closer to the weld, as that cools more slowly. It too can be transformed by tempering.

If, as would be suggested by the plate thickness, this weld is associated with load bearing or other critical structure, ie pressure vessel etc., then you need to be very careful about reheating and tempering to remove the Martensite as this procedure can reduce the tensile strength of the weld. I would suggest that you employ a qualified welder.
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Kevin LaPaire
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#12
In reply to #10

Re: How To Remove Maganite During Welding

04/08/2015 9:52 AM

Not only a qualified welder, but get a WPS from a qualified welding engineer who can give you ALL the required variables. I can't recall, but I am quite sure that there is no prequalified joints for the grade of material being used.

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only1yeti
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#11

Re: How To Remove Maganite During Welding

04/08/2015 5:51 AM

As a welding supervisor shouldnt you already know the answer to this? or atleast know the reference material you need to read to find out the answer?
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Anonymous Poster (1); classic (1); IdeaSmith (2); Kevin LaPaire (1); lyn (1); only1yeti (1); Original_Macgyver (1); spades (1); Whitephone (3)

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