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Questions tagged [welding]

Use this tag when the question deals with the process of making a weld. For questions about weld design or the use of welds, use the [welds].

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Astute-class submarine nose module shape

The nose module features a continuous ridge running along it's side. The rest of the hull has the typical "cigar" shape as other sub designs. (Q1) Does the "ridge" have a proper ...
Ionkz's user avatar
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1 vote
2 answers
53 views

Division symbol in welding proceedure [duplicate]

I am dealing with a European contractor, and often I see a division symbol (÷) in their documents, screenshot below. Could somebody explain what that means? P.S. Hope this is the right stack for it. ...
Jek's user avatar
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What's the right stress relief treatment for AS161 magnesium alloy?

I have a 50 year old forged magnesium alloy wheel apparently marked AS161, which I have been led to believe is AS1.61 - not dissimilar to this picture here. So I assume 1.6% aluminium and 1% silicone ...
it's a hire car baby's user avatar
0 votes
1 answer
89 views

How to remove oxide layer around stainless steel welds with household items

I have a stainless steel pot whose welds show the formation of an oxide layer. Colors around those welds range from gold to dark blue (see images below). The main question is: How do I remove those ...
Big X's user avatar
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1 vote
3 answers
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Why doesn't the work piece melt when arc welding if a lot of amperes run through our electrode?

I am recently learning the theory of Manual Arc Welding. So far I have seen that our electrodes are connected to a machine that outputs hundreds of amps. The work pieces is electrically connected ...
AB2's user avatar
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1 answer
92 views

Can I weld stretch film?

I have large areas to cover (84 cm x 70 cm, 150 cm x 84 cm, and 150 cm x 70 cm) with stretch film (22 µm thick, 45 cm wide). The stretch film is not wide enough so I have to overlap several sheets to ...
Cara Duf's user avatar
0 votes
1 answer
71 views

Can somebody please explain this Design for Welding guideline and its use case?

This is the rule. Please help. Also identify a usecase.
Abdullah Yasin's user avatar
0 votes
1 answer
42 views

Does slag in case of overhead weld form a layer inside the molten metal pool?

In the case of horizontal weld, the slag covers the fresh molten melt because it has a lower density and forms a protective layer which prevents molten metal to come in contact with atmospheric gases. ...
Meeran Qari's user avatar
0 votes
1 answer
68 views

Advice on building an aquarium stand

I'm building a kitchen/bar in my unused basement area, and want to incorporate my 180 gallon saltwater aquarium into the design. Before I decide on a design, I wanted to ask for advice/opinions on ...
Adola's user avatar
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0 votes
1 answer
118 views

What is the power of a laser welding machine that can penetrate a weld of 10mm stainless steel?

Can a laser welding machine penetrate a weld of 10mm stainless steel?
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1 answer
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How to reduce a welded iron pipe without bending it?

I would like to reduce the diameter of an iron (welded) pipe without bending to the side, where the weld is. With the usual procedure, the result is as follows: I am using the usual pipe reducing ...
osemec's user avatar
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1 vote
2 answers
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Can epoxy bond two Aluminum alloy beams?

The bicycle component manufacturer Shimano makes crankarms named "Hollowtech". Hollowtech crankarms are meant to be both strong and light. As the diagram below (source: Shimano) shows, the ...
Sam7919's user avatar
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3 answers
294 views

Relation between welding bead and outer diameter of a pipe?

How can we find a relation between welding bead and outer diameter of a pipe? Welding bead is inside of the pipe and I am using M.S. pipe. Dimensions are listed below: Pipe OD=25.4mm Thickness=2mm ...
Ibrahim Omer's user avatar
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1 answer
42 views

Correct approach for selecting and calculating welding parameters - MAG welding of carbon steel

What would be correct approach for selecting welding parameters for MAG (Metal Arc Welding) welding of carbon steel. How to select information that will go in WPS (Welding Procedure Specification) ? ...
Sysrq147's user avatar
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Square box welding with T joint, welded with stick welding

When joining two square box beams in Tee, is it enough to weld them in only three sides or I have to weld the full perimeter of the square? If those 3 sided weld are suppose to bear weight, how much ...
user586254's user avatar
1 vote
2 answers
368 views

Consumable arc welding Polarity Effect on heat input

why DCEP is generally used in consumable welding process? As per my understanding more heat is generated where the electrons collide(anode), so in consumable welding,we want deposition and also want ...
Crazy_Court651's user avatar
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34 views

Alternative to welding steel

I am going to buy two steel hemispheres, 400 mm in diameter and 0.8 mm thick, to join them and create a sphere. Of these: https://www.alibaba.com/product-detail/Large-Metal-Half-Sphere-dome-...
Principe Mestizo's user avatar
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0 answers
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Backing up a welder's power source with lead acid batteries

I'm thinking of purchasing a MIG welder sometime in the future. Given, the ordinary mains cannot supply the power. So I would have to plug it through the dryer's outlet, with some adapter & ...
Dehbop's user avatar
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1 vote
2 answers
140 views

What is this kind of weld?

What does this kind of welding symbol indicate? I can see that it is a field weld, all around, with flat finish but the two vertical lines are not known to me. I found it in a drawing of a steel ...
S. Rotos's user avatar
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2 answers
64 views

What kind of welding technology is used for welding this muffler?

Here is an image of a muffler of an R/C aircraft engine. It's made of aluminium alloys. What do you think about the welding technology which is used to make this muffler? I can't see any welding bead.
Roh's user avatar
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3 answers
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What is this welding tool in this video?

https://youtu.be/w6aUzGaXShQ?t=135 At time 2:15, what's the type of the welding tool he uses? I have read a couple of types for welding tools but I cannot see it matches any type.
Franva's user avatar
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2 answers
107 views

Is Lift-tig welding the same as lift-arc welding?

I am a completely new not-even-started starter in welding. I would like to know is Lift-tig welding the same as Lift-arc welding? If not, what are the differences?
Franva's user avatar
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1 vote
1 answer
121 views

Is welding aluminum a good choice?

I am making an aluminum part with a sort of a built in pipeline where water runs to cool the system. To close and seal the "pipe" I would need a lot (at least 144!)screws and two very long (...
TQQQ's user avatar
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0 votes
1 answer
534 views

welding pipes with an angled fillet weld

I am designing a tractor implement for harvesting root crops. Similar to this one here, but stronger construction with cutting discs in front of it to prevent weed jam. These images will help you ...
sanjihan's user avatar
  • 103
1 vote
4 answers
1k views

When is a convex weld finish required?

In weld symbols one can specify the finish of the weld. In flush weld, for example, one needs to level the weld into a flat surface. I can imagine when this is needed: if something is required to rest ...
S. Rotos's user avatar
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3 votes
1 answer
422 views

Can Rotary Friction Welding be used to join metals and ceramics?

Is Rotary Friction Welding a good method to join cylinders of a metal (such as Ti alloy) and a ceramic (such as SiC). I know that Diffusion bonding can be used in such cases. However, it has its own ...
user0's user avatar
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0 votes
2 answers
221 views

Can Sheet Metal Be Formed With Bends At Weld Joints?

I understand that a weld, if done properly, is stronger than the base metal. Does this mean that if you have a part that needs to be formed, the bend can be made along the weld? Or is the weld filler ...
ImDumb's user avatar
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1 vote
2 answers
125 views

Quicker way to weld hexagonal nuts in honeycomb pattern

I am currently designed a structure that require hexagonal nuts to be placed side by side in honeycomb pattern, welded upon sheet. Other than doing it in old-fashioned way, is there any way/technique/...
gijoe's user avatar
  • 83
0 votes
1 answer
61 views

How effective are welding blankets?

I am a novice welder (D.I.Y). I need to weld in a very sensitive area. It will be surrounded by PVC and other plastics withing about 30-50cm of where I have to weld. I have an inverter arc welder, and ...
Louis van Tonder's user avatar
1 vote
0 answers
22 views

Finite element welding simulation with commercial software? [closed]

I am looking forward some libraries/add-ons to perform welding simulation (thermomechanical coupling, steel alloys) using commercial software, like Ansys or Abaqus. My aim is to determine better ...
Andrea's user avatar
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4 votes
1 answer
4k views

Why is fillet weld assumed to be in a state of pure shear stress?

According to Building codes, when calculating the maximum load a fillet weld can take, one checks only that the stress in pure shear is below the maximum shear strength. We know that shear yielding ...
S. Rotos's user avatar
  • 2,259
1 vote
2 answers
164 views

Can wet welding be done in mineral oil?

I'm interested in knowing whether or not submerged welding can be done in fluids other than water, specifically mineral oil in this case. The reason I want to know is that I'm looking into designing ...
Gabe's user avatar
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-1 votes
2 answers
2k views

Welding Carbon fibre

How do you weld carbon fibre to another piece of carbon fibre? If it can't be welded together what other solutions are there for connecting carbon fibre together?
Gabriel Kusiak's user avatar
1 vote
0 answers
35 views

How to weld a copper flange with a Nickel alloy pipe?

I have a copper flange and I want to weld it to a nickel alloy pipe. Normally, which welding technique is used to join these two parts? Also what is the filler material to be used to weld a copper ...
Selvaprakash Vijay's user avatar
2 votes
2 answers
62 views

What treatment is necessary after welding carbon steel pipes?

When welding stainless steel pipes, the welds need some treatment (e.g. ball blasting and pickling). Is there anything equivalent for carbon steel (not stainless)? I'm looking at a tender document ...
mart's user avatar
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1 vote
0 answers
37 views

Is it possible to silver solder a reliable grounding connection to a stainless steel ultrasonic cleaner tank?

My ultrasonic cleaner has a stainless steel tank with a threaded grounding stud for fastening a mains earth wire. I tried to tighten nut that fastens the ground terminal to the stud, but the stud ...
user148298's user avatar
4 votes
4 answers
2k views

Is it possible to increase the heat output of a gas stove by connecting two gas supply canisters to it at the same time, and is it safe to do so?

Here's a typical outdoor gas stove: It is fed by a low-pressure gas supply in the form of a camping cartridge or via an LPG cylinder connected to a low-pressure regulator (around 30mbar) like this ...
WackGet's user avatar
  • 151
1 vote
2 answers
1k views

Can I use a NPT fastened device to vacuum or 10^-2 Torr?

I am designing a flange to be use to maintain a pressure of 10-2 Torr for at least 3 months. I am using an o-ring seal from my (device) to the product weldment. I am looking for feedback on using NPT ...
jreillygreekngineer's user avatar
1 vote
2 answers
59 views

Electric Arc Furnace Steam Production

How much steam is emitted from an electric arc furnace in a unit of time? I have not been able to find any data on this which is strange considering the amount of water that is used to cool an ...
Hypnos Stratagem's user avatar
0 votes
1 answer
948 views

What are the benefits of a digitally controlled TIG welder?

There are "analog" TIG welders where the parameters are directly controlled by rotary knobs and buttons. For example this one. Then there are "digital" ones where parameters are controlled by one ...
Pibben's user avatar
  • 109
1 vote
2 answers
348 views

High frequency TIG welding and Bluetooth or WIFI frequency

I need to work on a project where multiple objects need to exchange trough wireless protocol and they are near to High frequency TIG welding machine. All objects works by pair (one emitter and one ...
vib's user avatar
  • 143
-1 votes
1 answer
386 views

What materials can be used for Brazing

I have trouble understanding the Brazing principle. What I know is that there are a couple of filler materials such as copper, silver, aluminim, etc.... What I remember from the past is that the ...
André Rodriguez's user avatar
1 vote
1 answer
201 views

Is it possible to spot weld three rather than two plates?

I have a situation where ideally, I would like to resistance spot weld three rather than the usual two plates together (individual plate thickness approximately 0.7mm). Is this at all possible? If not,...
Sanchises's user avatar
  • 205
1 vote
1 answer
87 views

Laser beam welding

I would like to use a laser beam to weld small metal parts that are located within an air tight enclosure but want the laser head to be located outside the enclosure which would require the laser beam ...
Donny's user avatar
  • 11
0 votes
1 answer
143 views

Plate thickness for repair of completely corroded web

The web of a H-section column has been completely corroded at the air-moisture interface with the concrete encasement leaving a hole in the web. The proposal is to break out the existing concrete and ...
egg's user avatar
  • 857
0 votes
2 answers
390 views

200A tig welder enough to weld 8mm thick steel flat bar/stainless steel sheet/tubing

I would like a tig welder. It has to be able to weld 8mm thick steel flat bar so we can fix the front gate if it breaks. I also want to be able to do stainless and aluminium for projects. It seems ...
Ageis's user avatar
  • 103
1 vote
0 answers
46 views

What is the smallest size of pipe to which I can Weld a 1 inch pipe Perpendicular to the Axis?

I would to know what is (or how to calculate) the size (dia) if the smallest pipe to which I can weld a 1 inch pipe from the side of the bigger pipe perpendicular to its axis (like a tee).
ZenMaster's user avatar
  • 113
1 vote
1 answer
5k views

Arc-welding 2mm thick steel at an angle without burning-through

I'm learning a bit of stick welding since I keep needing it for certain projects. Total beginner. The latest thing I decided to make is a table similar to this one: The material is 2mm thick ...
hilchev's user avatar
  • 113
0 votes
0 answers
55 views

Phase prediction by cct diagram

Can someone please help in finding out the phase proportion of each phase w.r.t time , cooling rate and temperature by using (mathematical model to predict phases from given cct diagram) Leblond ...
sudheer kumar polamuri's user avatar
0 votes
0 answers
31 views

How to find phase proportion at equilibrium - from iron-carbon diagram - Leblond

{Equilibrium proportion P, this is the proportion which is reached at a constant temperature after an infinitely long time:P is also the austenite proportion in the case of extremely slow heating. It ...
sudheer kumar polamuri's user avatar