Stainless Steel 409L Strips Coil Sheet Plate
Grade 409L is titanium stabilized ferritic stainless steel containing about 11% chromium conforming to UNS S40910. The presence of chromium leads to the formation of a passive surface film which provides corrosion resistance. The addition of titanium prevents formation of harmful chromium carbides which can lead to inter granular corrosion in service. Titanium being a ferrite former also helps in avoiding hardening on cooling after welding. Furthermore, titanium also ties up with sulphur, leading to improved resistance to pitting corrosion. Atmospheric corrosion resistance of this grade is nearly 250 times that of mild steel. This grade is well suited for such mildly corrosive environments where good formability and weldability are required. 409L stainless steel is especially suitable for the manufacture of automotive exhaustive systems on account of:
¿¿¿ Good cold workability similar to that of low alloy steels.
¿¿¿ Good corrosion resistance in natural atmospheres and in contact with moderately corrosive media.
¿¿¿ Good oxidation resistance up to 800 0C.
¿¿¿ Good weldability.
Grade Specifications for Stainless Steel 409 Coils
|Grade ||WERKSTOFF NR. ||AISI ||UNS ||AFNOR ||BS ||GOST ||JIS |
|SS 409 ||1.4512 ||409 ||S40900 ||Z3CT12 ||409 S 19 ||SUH 409 ||– |
Chemical Properties of SS 409 Coils
|Grade ||C ||Ni ||Si ||S ||Mn ||P ||Cr ||Ti |
|SS 409 ||min. ||– ||– ||– ||– ||– ||– ||10.5 ||6x C |
|max. ||0.08 ||0.5 ||1.00 ||0.045 ||1.00 ||0.045 ||11.75 ||0.75 |
Mechanical Properties of SS 409 Coils
|Tensile Strength(MPa) min ||Yield Strength 0.2% Proof (MPa) min ||Elongation (% in 50mm) min ||Rockwell B (HRB) max ||Brinell (HB) max |
|450 ||240 ||25 ||75 ||131 |