Shielding gas-argon - hydrogen mixtures, Mechanical Engineering

Assignment Help:

Argon - Hydrogen Mixtures


Argon - hydrogen mixtures are employed in special cases, such as mechanised welding of light gauge stainless steel tubing, in which the hydrogen does not cause adverse metallurgical effects such as porosity and hydrogen induced cracking. By Increased  of welding speeds can be achieved in almost direct proportion to the amount of hydrogen added to argon because of the high  arc voltage. However, the amount of hydrogen that can be added varies with the metal thickness and type of joint for each particular application. Excessive hydrogen will cause porosity. Argon - hydrogen mixtures are limited to use on stainless steel, nickel - copper and nickel base alloys. The most commonly used argon - hydrogen mixture contains 15 % hydrogen which is used for mechanised welding of tight butt joints in stainless steel up to 0.062 in. (1.6 mm) thick. For manual welding,a hydrogen content of 5 % is sometimes preferred to obtain cleaner welds. 


Related Discussions:- Shielding gas-argon - hydrogen mixtures

Find out power transmitted by belt, Find out power transmitted by belt: ...

Find out power transmitted by belt: A belt is running over pulley of 1.5m diameters at 250RPM. The angle of contact is 120º and coefficient of friction is 0.30. If maximum te

Cantilever beam stress, Dear Engineer! I have an aluminum tube(6061) fixed...

Dear Engineer! I have an aluminum tube(6061) fixed at one end (Cantilever Beam). The length is 180” and the load on the other end is 150 lbs. Question: What size of tubes I s

Flow work and flow energy - thermodynamics, Flow Work and Flow Energy - the...

Flow Work and Flow Energy - thermodynamics: Flo w Work:  The flow work is energy needed to move the working substance against its pressure It is called as flow or displac

Strength of material and engineering mechanics, Di fferentiate between str...

Di fferentiate between strength of material and engineering mechanics Sol.: Three primary areas of mechanics of solids are statics, dynamics and the strength of materials.

Determine the size of grains using fineness test of sand, Q. Determine the ...

Q. Determine the size of grains using fineness test of sand? Fineness test :   Fineness test of sand specimen determines the size of grains and the distribution of grains of

What is electrode coatings and how it works, Q. What is electrode coatings?...

Q. What is electrode coatings? • Slag Forming Ingredients. Asbestos, mica, silica, fluorspar, titanium dioxide, iron oxide, magnesium carbonate, calcium carbonate and aluminum

Steam generator piping, Q. Steam Generator Piping? Control valves shall...

Q. Steam Generator Piping? Control valves shall be Fisher or Purchaser-approved equal. All valves shall be detailed by size, rating, make, model number, and materials Two

Principle of submerged arc welding, PRINCIPLE OF SUBMERGED ARC WELDING In...

PRINCIPLE OF SUBMERGED ARC WELDING In submerged arc welding, the arc zone is submerged beneath the molten flux and hence there is no visible signature of the arc. Welding current

Determine the reactions at beam, Determine the reactions at bea: A can...

Determine the reactions at bea: A cantilever AB, 1.8 m long is fixed at A and carries uniformly distributed load of 20 kN/m over its entire length and a point load of 30 kN at

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd