Sanicro 30 (UNS N08800, W.Nr./EN 1.4558, DIN designation X2NiCrAlTi32-20) is an iron-nickel-chromium heat-resisting alloy developed by the Sandvik/Alleima materials group. Unlike the fully nickel-base superalloys elsewhere in this family, Sanicro 30 is built on an iron matrix with nickel and chromium as the dominant alloying additions, plus small, closely controlled additions of titanium and aluminum. That places it closer to the Alloy 800 family than to a true Inconel or Udimet-type superalloy, and it is generally supplied as a low-carbon variant intended for long-term, stable service rather than maximum short-term strength.

The alloy is a long-established choice for steam generator tubing in nuclear power stations (PWR service) and for other heat exchangers operating up to roughly 550°C (1020°F), where resistance to stress-corrosion cracking and intergranular attack matters as much as high-temperature strength. Its moderate nickel content (versus higher-nickel superalloys) gives it good resistance to chloride-induced stress corrosion cracking while keeping the alloy considerably easier to fabricate and weld than the more heavily alloyed nickel-base grades.

Sanicro 30 machines like the other iron-nickel-chromium heat-resisting alloys in this family: it work-hardens readily under cutting forces, conducts heat away from the cutting edge more slowly than plain carbon or low-alloy steels, and tends to gall or build up on the cutting edge because of its chemical affinity for common tool materials. Because its nickel content (32%) is lower than that of the fully nickel-base superalloys elsewhere on this chart, its cutting forces and work-hardening tendency are somewhat less severe than an Inconel or Udimet-type alloy of similar hardness - but the fundamentals of the approach are unchanged.

A constant, adequate chip load is essential to avoid rubbing in the deformation zone and leaving a hardened skin for the next pass. Rigid setups minimize deflection and chatter, which otherwise accelerate notch wear on an alloy that already resists plastic flow at the tool tip. Sharp, positive-rake carbide geometries reduce cutting forces and heat generation compared to neutral or negative geometries suited to plain steels, and moderate-to-low cutting speeds with generous, consistent coolant delivery keep the heat at the tool-chip interface under control.