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Weldability of Metals

By Prof. D K Dwivedi   |   IIT Roorkee
Learners enrolled: 284   |  Exam registration: 9
ABOUT THE COURSE:

The course content is designed to have systematic and comprehensive understanding on various aspects related with weldability of various metal systems of commercial importance. It is proposed to include weldability, factors affecting weldability of metals, weldability of plan carbon steel, alloy steel, and stainless steels. Presentations will be supported with case studies for effective communication of concepts and procedures. Case studies will be taken up regarding dis-continuities in metal systems like ferrous and non-ferrous metals.

INTENDED AUDIENCE: UG and PG Student, Research Scholar & Practicing Engineers

INDUSTRY SUPPORT: Manufacturing industry
Summary
Course Status : Upcoming
Course Type : Elective
Language for course content : English
Duration : 8 weeks
Category :
  • Mechanical Engineering
Credit Points : 2
Level : Postgraduate
Start Date : 18 Aug 2025
End Date : 10 Oct 2025
Enrollment Ends : 18 Aug 2025
Exam Registration Ends : 29 Aug 2025
Exam Date : 02 Nov 2025 IST
NCrF Level   : 4.5 — 8.0

Note: This exam date is subject to change based on seat availability. You can check final exam date on your hall ticket.


Page Visits



Course layout

Week 1:   
1. Understanding Weldability: IntroductionI.
2. Understanding Weldability: Introduction II,
3. Metal Properties & Weldability I,
4. Metal Properties & Weldability II,
5. Weldability of Work Hardenable Metals

Week 2: 
6. Weldability of Work Hardenable & Precipitation Strengthened Metals.
7. Weldability of Precipitation Strengthened Metals.
8. Weldability of Metals Strengthened by Grain Refinement, dispersion Hardening and Transformation Hardening.
9. Weldability of Transformation Hardening Metals.
10. Weldability of Metals: Combination of Strengthening Mechanisms.

Week 3:  
11. Weldability Consideration
12. Weldability of Carbon and Alloy Steel – I,
13. Weldability of Carbon and Alloy Steel – II
14. Weldability of Carbon and Alloy Steel – III
15. Weldability of Low Carbon Steel and Mild Steel

Week 4:  
16. Weldability of Medium Carbon Steel and High Carbon Steel
17. Weldability of Carbon and Welding Processes- I
18. Weldability of Carbon and Welding Processes- II
19. Weldability of Carbon Steel and Welding Processes III
20. Weldability of Carbon Steel and Radiation Welding and Thermal Cutting.

Week 5  :   
21. Weldability of High Strength Low Alloy Steels.
22. Weldability of Q & T Steels- I
23. Weldability of Q & T Steels- II
24. Weldability of Q & T Steel- III
25. Weldability of Q & T Steel- IV

Week 6  :   
26. Weldability of HTLA Steel- I
27. Weldability of HTLA Steel- II
28. Weldability of Cr-Mo steel I
29. Weldability of Cr-Mo Steel- II
30. Weldability of Cr-Mo Steel- III

Week 7 :   
31. Weldability of Pre-Coated Steel- I
32. Weldability of Pre-Coated Steels- II
33. Weldability of Stainless Steel- I
34. Weldability of Stainless Steel- II
35. Weldability of Martensitic Stainless Steel I

Week 8 : 
36. Weldability of Martensitic Stainless Steel- II
37. Weldability of Ferritic Stainless Steel,
38. Weldability of Austenitic Stainless Steel -I
39. Weldability of Austenitic Stainless Steel- II
40. Weldability of PH Stainless Steel.

Books and references

  • Lancaster J F., “Metallurgy of Welding”, Allen & Unwin Co. 2000
  • Castro R. and Cadenet J. J. de., “Welding Metallurgy of Stainless and heat-resisting steels”, Cambridge Uni. Press. 1975
  • Welding, Brazing and soldering”, Vol. 6, ASM International, ASM, Ohio. 1993
  • Kou S., Welding metallurgy, 2nd edition, Wiley Publications 2003
  • Hrivnák, I., “Theory of Weldability of Metals and Alloys”, Elsevier Science 1991
  • Gene Mathers, “Welding of Aluminium and alloys”, Wood Head Pub. UK. 2002

Instructor bio

Prof. D K Dwivedi

IIT Roorkee
Prof.D K Dwivedi obtained BE (mechanical engineering), in 1993 from GEC Rewa, ME (welding engineering) Univ. of Roorkee in 1997 and PhD in Met. Engineering from MNIT, Jaipur in 2003. He has about 9 years teaching experience at NIT Hamirpur and 29 years at IIT Roorkee of subjects related with manufacturing at UG level and welding engineering related subjects at PG level. He has published more than 145 research papers in SCI/SCIE indexed journals and undertaken more than 24 sponsored research and 56 industrial consultancy projects. Instructor has authored six books namely “Production and Properties of Cast Al-Si Alloys with New Age International, New Delhi (2013), Surface Engineering, Springer, New Delhi (2018) and Fundamentals of Metal Joining, Springer, (2021), Materials Engineering, AICTE (2022), Dissimilar metal joining, Springer Nature (2023) and Manufacturing Processes, AICTE (2024).

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: November 02, 2025 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

CRITERIA TO GET A CERTIFICATE

Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

Please note that assignments encompass all types (including quizzes, programming tasks, and essay submissions) available in the specific week.

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Roorkee .It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team


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