Every note published so far, newest first. Use the search on your browser or the grade pages to jump to a specific alloy.
Both are nickel-chromium alloys with 8–10% molybdenum, so room-temperature datasheets look alike. Above 800 °C they are limited by different mechanisms: 617 by creep and scale adhesion, 625 by a precipitate that does not survive.
Read the note →Both alloys survive furnace atmospheres, but they protect themselves differently: 600 relies on chromia, 601 on alumina. The choice usually turns on how often the furnace cycles, what sulfur is present, and whether the part ever sees aqueous corrosion.
Read the note →Both are nickel-chromium alloys hardened by titanium, aluminium and niobium. They are rarely interchangeable — the decision usually comes down to section size, welding and how hot the part really runs.
Read the note →Both handle aggressive chemistry, but they fail in different places. C276 is the chlorine and hypochlorite alloy; G3 is the sulphuric-phosphoric workhorse with better thermal stability and a lower alloy cost.
Read the note →The two nickel-copper grades share a base chemistry and almost nothing else. K-500 is 400 plus aluminium and titanium, aged to roughly double the yield strength — with real penalties in ductility, welding and magnetic behaviour.
Read the note →904L costs several times what 316L does per kilogram. It earns that premium in chloride plus sulphuric acid service — and wastes it in clean water. Here is how to tell which case you are in.
Read the note →Both are duplex stainless steels with roughly double the yield of 316L. The choice between them is set by chloride level, temperature, flow and how much welding the fabrication carries.
Read the note →Buyers of nickel alloys get burned by the same pattern repeatedly: a broker quotes a good price, ships material with a plausible certificate, and the problem only surfaces at the NDT stage. These are the checks that catch it before the order.
Read the note →625 is the corrosion and welding alloy; 718 is the structural one. Choosing between them is mostly a question of whether the part is loaded, welded, or exposed to chlorides.
Read the note →The certificate is the only document that ties a heat to your parts. Here is what a 3.1 must contain, the four checks that catch most problems, and where 3.2 differs.
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