Welder Tech

do not draw the heat. weld then cover with natural lime powder and let cool.

Very important note is to minimize the heat input due to welding by selecting a welding procedure applying a small diameter wire/electrode which required a relatively low ampere. Heat input = Volt x Ampere / Speed.

We can use preheating and intermediate heating between weld passes to control the rate of heating or cooling depending on type of material and its thickness. If you give me the name of material in accordance with ASME code or ASTM, I can inform you with the necessity for preheating.

Rene 108 ASTM VBC9108

I looked for the material ASTM 108-VBC9108 at ASME code, Section II, Part A, sorry I didn't find it.

http://www.hitchiner.com/documents/Alloy_list.pdf

Alloy Type Designation Castability Weldable Tensile Yield Elong In Area °F PSI Life Elong

Rene 108 B50TF262 Poor No 135,000 100,000 8 10 1800 30,000 20

"Rene 108 B50TF262 Poor No 135,000 100,000 8 10 1800 30,000 20"

This specification is neither ASTM nor ASME material specification.

The actual cracking is accuring in the base material not in the weld deposit.

salam allikum

i think that silicon cast iron has a very good chilling effects, also copper does,

but i dont like the idea for chilling the welds specially for welding high carbon steel and alloy steel, so as not to have a martensitic structure in the HAZ

I assume you want to protect the metal immediately around the weld from distortion or damage, in that case i would suggest an aluminum or copper block with a channel where the weld itself would touch or one on either side either finned or water cooled.