SUS409L Stainless Steel: Automotive Exhaust System Material

Jan 14, 2026

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Chemical Composition and Properties: What Sets 201 and 304 Apart?Characteristics of SUS430 Stainless SteelWhat is the difference between SUS304 and SUS316?

Chemical Composition of ASTM A268 409 S40900 Grade and EN 10088-2 1.4512 1.4516 Stainless Steel

Grade–CMnSiPSCrNiTi
A268 409min. max.– 0.08– 1.00– 1.00– 0.045– 0.03010.5 11.7– 0.506×C-0.75
TP409Lmin. max.– 0.035– 1.00– 1.00– 0.045– 0.03010.5 11.7– 0.506×C-0.75
1.4516min. max.– 0.08– 1.50– 0.70– 0.040– 0.01510.5 12.50.50-1.500.05-0.35
1.4512min. max.– 0.030– 1.00– 1.00– 0.040– 0.01510.5 12.5– 0.506×(C+N)-0.65

 

 

Mechanical properties of ASTM A268 409 Grade and EN 10088-2 1.4512 stainless steel

GradeTensile StrengthYield Strength 0.2% ProofElongationHardnessHardness
Gradeksi(MPa) minksi (MPa) min(% in 50mm) minRockwell B (HR B) maxBrinell (HB) max
40955 (380)25 (170)2095207
1.4512380-56021025  

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.

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