HAZ size

[Hany Nabil]

Dear exports,

For HAZ in side welding depending on heat input.

How to calculate HAZ distance ?

Any equation formula ?

Thanks,

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 Best Regards,

 Eng. Hany Nabil

 Senior Welding Engineer

 Petrofac

 Engineering and Production Service

 Email: eng.han...@gmail.com

 Egypt Mobile: 002-01225622022

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[Patel Ankit]

Dear Sir,

Really Heat affected zone is measured regarding the micro-structure changes in the weld and also according to the experts. The theoretically calculation of HAZ may be not accurate to depend.

You can find such formula in chapter three of AWS Welding Handbook {Heat Flow in Welding}

1/Tp-To = 4.13pchY/ Hnet + 1/Tm-To;

where,

Y is width of HAZ in mm

h: plate thickness in mm

Tp is peak temperature,

To is initial plate temp (room temp or preheat temp),

pc-volumetric specific heat (J/mm3.C),

Tm is melting temp;

Hnet: net heat input (J/mm)

Regards,

Ankit Patel

Mo No : +91 8140255303

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[George Dilintas]

I have done this using FE simulation 

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

[james gerald]

Taken from AWS Handbook Volume 1, Chapter3, Heat Flow in Welding

Thanks & Regards

J.Gerald Jayakumar

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