According to Explain That Stuff, cast iron has carbon added, which makes it extremely hard and durable, but also it can be brittle.

Not sure about light poles but we have processed steel/stainless combinations. Steel has different options, a mild steel or stainless steel; Mild steel has a ‘low degree to thermal expansion’ and is an excellent choice for flanges. In response to that, a group member wrote to me off-group to warn against. Ultimately for corrosion resistance use 316 stainless steel anchors and stainless steel light poles :-). Work table bearers, lifting 'dogs' and chain marks have all been noted as causes. this is in cast iron not aluminum. Cast Iron Vs. Any one have experience with >> stainless >> bolts galling in cast iron? John B John B Senior Member; Members; 3,568 posts; Location Dawlish, Devon, UK; Posted February 13, 2011. Non-metallic contact materials and vacuum lifting equipment should be used to avoid process contamination. Stainless is far softer than steel and also does not conduct heat very well, so when you run into a burrr or metal shaving in a bolt hole it will almost immediately GALL. Knowing which pieces of cookware to use when can not only add an extra flavor to your dishes, but also ensure the longevity of your beloved pans. The most important thing to note when using stainless steel fasteners is to check the grading of the steel. Whether you’ve already stocked your kitchen with a carefully-selected set of cookware or you own a few ragtag cast iron and stainless steel skillets, there’s a chance you’re not using the right pans at the right time. Their main difference is alloy content—carbon steel has under 10.5 percent alloy content, while stainless steel must contain 10.5 percent chromium or more. Cast iron is often cheaper than cast steel because of the lower material costs, energy, and labor required to produce a final product. >> to use stainless steel bolts. You can cut through it with a knife and some elbow grease. If is cast steel, there are many ways to go, mig, preheat, weld it very hot, post heat, wrap, , or stick 7018, same procedure, i use 312 stainless on all of the cast steel to steel off road truck builds. Yes - Cast iron works great with electric and induction stove tops. Carbon steel or cast iron : Copper alloys (brass, bronze ) Lead : STAINLESS STEEL : Nickel alloys (Incoloy 825,Hastelloy B) Titanium : Graphite : CATHODIC (Most Noble) The further apart the metals are, in terms of relative potentials, the greater the driving force in a cell. Conversely, if you use aluminum to attach a large sheet of stainless steel, the aluminum life will be dramatically shortened. Just like cast iron, stainless steel does is used often by top chefs because it doesn’t leach any of the metals into your food. It worked both times. However, pure iron is relatively soft.
ARP is a premium line of fasteners. Stainless steel can be prone expanding during heat cycles, then retracting when cooling.