Yes,
use a 400 deg F preheat.
If there will be subsequent machining, use E-Ni electrode (99% Ni)
If no machining, E-NiFe will work. Chip, peen and wire brush between passes.
Slow cool if possible
Hope this helps
Electric resistant weld
It is one way to "Stress Relieve" the weld joint. As the weld metal metal cools it contracts and hammering on the weld expands it. On thick sections it is done after every layer of weld. Often used when welding cast iron or other metals with a low COE (Coefficient of Expansion).
First, Butt-weld is short for a butt groove. Welding in a butt-groove starts at the throat of the butt-groove. The first weld point could be a tack-weld: holding the two materials to be welded together. The throat is measured and filler metal and electrode are determined to create the root pass.
The required size for a seal weld per AISC is eighteen foot length. AISC also specifies minimum weld size based on the thicknesses of the members joined.
wildly welding main pipe the are fillet weld or butweld
it is not easy to weld hard materials....it always difficult to hard materials.....
yes malleable is very ductile
Nothing BUT ductile is much stronger
I.S.CODES RELATED TO DUCTILE IRON PIPES IS 9523:1980 Ductile Iron fittings for pressure pipes for water, gas and sewageIS 8329:1977 Centrifugally cast (spun) Ductile Iron pressure pipes for water, gas and sewage IS 12288:1987 Code of practice for laying of Ductile Iron pipes Got it ! OK !
its darker
Ductile iron is generally conductive with a thermal conductivity of 36 watts per meter. Compared to grey iron, its conductivity is lower.
Yes
Ductile Iron Pipes
Cast iron mainly includes grey cast iron, ductile cast iron and malleable cast iron. As for ductile iron, it has very wide application, such as Pressure pipes and fittings, Automotive applications, Agriculture, road and construction applications, General engineering applications. As for the specific application of ductile iron, grey iron and malleable cast iron, please refer to the links below.
Electric resistant weld
Cast iron, is one example of a non-ductile metal. Unlike ductile metals, copper, steel, aluminium - cast iron is too brittle to be reworked.
Grey, dull silver.