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AISI data sheet 409

Stainless steels containing a good amount of chromium but without addition of nickel and other elements capable of forming austenite.

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ALTERNATIVE NAMES

ASTM EN UNS JIS
409 1.4512 - SUS 409

CHEMICAL COMPOSITION

409 Chemical Composition - Maximum Value
C Mn Si Cr Ni P S Ti
0.05 1.0 1.0 10.50-11.7 0.5 0.04 0.015 8X(C+N)0.15-0.5
Typical Value
0.01 - - 11.5 0 0.02 0.15 0.2

MECHANICAL CHARACTERISTICS

Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
450
(550)
230
(280)
23
(25)
76 131

END USES

Grade 1.4512 is a ferritic stainless steel, Titanium stabilised, with 11% Chromium for high temperature applications up to 600º C. At microscopic level, it has a completely ferritic crystalline structure (and in fact, at ambient temperatures it has ferromagnetic characteristics), and the addition of Titanium allows better stability and prevents the formation of martensite in moulding processes.

Thanks to good resistance to corrosion and high temperatures, it is mainly used in the automotive industry, where it is used for parts of exhaust systems. Other possible applications are gas boilers and other applications at high temperatures.