High strength (>760MPa) martensitic stainless steel
with better resistance to corrosion, hydro-cavitation,
sulphide-induced SCC, and good sub-zero toughness
when compared with plain 12%Cr steels (e.g. type 410/
CA15).
Weld metal of this type greatly overmatches the
strength of equivalent parent material and is
remarkably resistant to softening during PWHT. These
properties can be exploited for welding martensitic
precipitation-hardening alloys if corrosion conditions
are compatible with lower alloy weld metal, with
the advantage of a single PWHT at 450-620°C for
tempering. The 410NiMo consumables are also used
for overlaying mild and CMn steels.
13%Cr-4%Ni alloys are used in cast or forged form
for **hydraulic turbines, valve bodies, pump bowls,
compressor cones, impellers and high pressure pipes**
in power generation, offshore oil, chemical and
petrochemical industries.
