Stainless martensitic • precipitation hardening steel • stainless ferritic — Our answer to your needs
Stabilised Ferritics with Mo 436 444 470LI
Grades which compete with 316/316L in corrosion resistance. The absence of nickel produces a lower cost alternative. The ferritic structure gives excellent deep drawability and stress corrosion cracking resistance but disadvantages in welding of thick sections and stretch forming.
Equivalent EN and UNS Grades - 1.4526 1.4521 1.4613 S43600 S44400
Approximate Composition – 17-20% Cr, 1.0-2.0% Mo, plus combinations of stabilising elements like Ti and Nb. 470LI uses 24% Cr instead of Mo additions to achieve comparable corrosion resistance to 316. (Exact composition ranges vary between EN and ASTM standards).
These grades combine the following characteristics:
These grades have been used extensively over the years for a number of familiar applications such as exhaust systems. They are being targeted at competing with 316 in applications where the limitations on weld thickness and stretch forming are not an issue.
Applications which illustrate these features include:
Cladding, wall panels, exhaust systems, roofing, handrails, catering equipment, domestic plumbing, hot water tanks, sugar processing, electrical motor housings.