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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STAINLESS STEEL

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AISI 409

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AISI 439

AISI 441

AISI 444
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* The values shown in the tables are approximate and not binding.

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ALTERNATIVE NAMES

ASTM	EN	UNS	JIS
409	1.4512	-	SUS 409

CHEMICAL COMPOSITION

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
Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	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.