Skip to main content

Re: [MW:35353] Cast-iron welding

By Materials & Welding
you could braze it...

On Wed, Dec 18, 2024 at 5:41 AM sridhar cn <sridharcn305@gmail.com> wrote:
Dear Mr. Rajan,
Following steps will help to weld Cast iron successfully.
a. Preheat the CI to a min. of 250-300 deg C to avoid cracking tendency using Oxy fuel or LPG torches. Maintain 
    inter-pass temperature till the welding is complete.
b. For non machinable welding of CI, use LH electrodes like E 7018 , E 8018 C-1 with SMAW process.
c. Use stringer beads and avoid weaving. Use short beads and peening (for each run) to reduce the stresses during welding.
d. For machinable welding, ENi-CI (pure Nickel) or Ni-Fe (Nickel iron) could be used for both Grey and ductile cast iron.
    Both also have superior corrosion resistance properties. FCAW process with similar chemistry could be used as an alternative.
e. CI can be welded with SS electrodes like E 308 and E 309 type also effectively.
f.  Any cracks propped up during welding should be removed by grinding and rewelded as mentioned above.
g. Allow the weld and HAZ zone to cool slowly, possibly wrapping it in an insulation blanket like Asbestos cloth or covering 
    with dry sand. 
h. Use DP check at room temp. to check the final weld quality.

Hope the above details will help you to weld the CI without any defects.

C Sridhar.
---------------------------------------------------------------------------------------------------------------------------------------------------


   


On Wed, 18 Dec 2024 at 16:39, <elams.rajan@gmail.com> wrote:

Any advice for cast iron welding

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/862025221.2919604.1734517515576%40mail.yahoo.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAHo%3DYihc%2BCkidFuL6D8DyKzQJr-%2BCMVSs8-0xFf%2By0mi_rtBRA%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAP9g3GDeOosG8BjYkia-8sg4UwxiSfsG6jkA%3DB99qR4pRfac5g%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

By Materials & Welding
Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...
Post a Comment
Read more