No. It is the easiest to weld as the metal puddles well, and the heat runs evenly through the joint.
stainless steel
The main difference between cast iron and mild steel is the carbon content. Mild steel has a lower carbon content than cast iron. This makes cast iron brittle, while mild steel is much harder.
Tensile yield strength in a steel bar is the amount of pressure exerted before the bar begins to bend. Tensile steel is used for a variety of construction projects.
MS stands for mild steel. This is steel than only has a small about of carbon. It's strong, but not easily tempered. CS stands for carbon steel. In carbon steel, the main alloying element is carbon.
The alloy used for welding should be similar in strength to the bulk material being welded. Otherwise there will be stress concentration at the junction between the two alloys. This problem is somewhat reduced when the metals mix during welding, if the weld point moves slowly enough.
Mild steel
mild steel
stainless steel
Cast iron is more brittle then mild steel
HSS
In ordinary or "mild" steel, iron and carbon predominate. In stainless steel, there is usually a total of chromium and/or nickel that is substantially more than the carbon content. Molybdenum and some other metals are also found in some specialty steels.
The main difference between cast iron and mild steel is the carbon content. Mild steel has a lower carbon content than cast iron. This makes cast iron brittle, while mild steel is much harder.
aluminum has a lower melting point, higher thermal conductivity, and doesn't change color before it goes molten
yes
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Per the attached related link, the density (hence weight) of stainless is slightly more than the mild carbon steel. Using about 8.03/7.84 ratio of density, for the same volume of material the stainless will weigh 2.4 % more.
Typically mild steel can withstand vibration better because it has a higher density than the more brittle cast iron but cast iron may be better at absorbing vibrations than mild steel, due to its lower density.