Ask a Teacher

Search



WE CAN WELD ON IRON BUT NOT O STEEL ?WHY?

 Stainless steel and cast iron rod are both popular. The most serious problem with stainless is its great hot strength.  As the weld metal is solidifying it has enormous strength at, say, 1800 degrees.  Although cast iron has a higher melting temperature than stainless steel it has no appreciable strength at "red" heat so as the stainless weld shrinks in cooling, the cast iron tears the adjacent weld.  This area is called the HAZ (Heat Affected Zone).


comments powered by Disqus