Description
SS 441 / EN 1.4509
SS 441 (EN 1.4509) / UNS S44100) is a ferritic stainless steel containing niobium that provides the steel good oxidation and corrosion resistance. This steel provides good high-temperature strength in exhaust gas environments, and has good for deep drawing, good ductility, good weldability, and good brightness. It polishes well. The 441 flat rolled stainless steel possesses magnetic quality in all conditions.
This grade contains more than 17.5% chromium endowing it with good corrosion resistance. It is dual stabilized with niobium and titanium, thus ensuring excellent resistance to inter-granular corrosion. The addition of niobium improves high temperature oxidation resistance, creep and thermal fatigue resistance. In addition, it leads to a fine equiaxed grain structure with excellent deep drawability. On account of very low interstitial content and stabilization, this steel is characterized by good weldability and retains good mechanical properties in heat affected zone of weld.
SS 441 is a good choice for the manufacture of automotive exhaust systems that require good mechanical strength at high temperature, corrosion resistance at high and low temperature and good cold ductility.
Chemical Compositions of Stainless Steel 441 / EN 1.4509 :
| Element | % Present (in product form) |
| Carbon (C) | 0.03 |
| Silicon (Si) | 1.00 |
| Manganese (Mn) | 1.00 |
| Phosphorous (P) | 0.040 |
| Sulfur (S) | 0.015 |
| Chromium (Cr) | 17.50 – 18.50 |
| Titanium (Ti) | 0.10 – 0.60 |
| Niobium (Nb) | (3xC+0.30) to 1.00 |
| Iron (Fe) | Balance |
Mechanical Properties:
| Mechanical properties | UTS (MPa) |
YS (MPa) |
%EL | Hardness |
| ASTM A240 – UNS S43940 | 430 min | 250 min | 18 min | 88 HRB max |
Stainless Steels 441 Equivalent Grade :
| Grade | WERKSTOFF NR. | AISI | UNS | JIS | EN |
| SS 441 | 1.4509 | 441 | S44100 | SUS 44100 | X2CrTiNb18 |
Products available:
Hot rolled and Cold Rolled coils, plates and sheets
Applications:
- • Automotive Exhaust system: Manifold, Catalytic converter
- • Solar hot water tank, Solar Collector, Solar panel
- • Rail and road vehicles, container construction, warehouse
- • Transportation equipment of the sugar industry, absorbing duct and coal mining.
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