USA Piping Solution is an established manufacturer and supplier of Stainless Steel 409 Seamless Tubes, also known as SS 409 Seamless Tubes. Grade 409 is a low chromium ferritic stainless steel that is titanium stabilized and is the most widely used ferritic grade in the world, particularly in the automotive and exhaust manufacturing industries. Our SS 409 Seamless Tubes offer good oxidation resistance at elevated temperatures up to 700 degrees Celsius, satisfactory corrosion resistance in mild environments, and excellent formability. We supply SS 409 Seamless Tubes as per ASTM A268, ASTM A511, and related standards. Our tubes are used in exhaust systems, catalytic converters, heat shields, and low pressure fluid applications. We maintain ready stock and can provide test certified material with full material traceability for each order.
Stainless Steel 409 Seamless Tubes Specifications
Parameter | Details |
|---|---|
Grade | SS 409 / SS 409L |
Standard | ASTM A268 / ASME SA268, ASTM A511, EN 10216-5 |
Manufacturing Method | Seamless (Cold Drawn / Hot Finished) |
OD Range | 6.35 mm to 101.60 mm |
Wall Thickness | 0.8 mm to 12.70 mm |
Length | 1 m to 6 m, random or cut to length |
End Finish | Plain End, Beveled End |
Surface Finish | 2B, Pickled and Annealed, Bright Annealed |
Delivery Condition | Annealed |
Testing | Hydrostatic Test, Flattening Test, Eddy Current Test |
Certification | Mill Test Certificate, EN 10204 3.1, Third Party Inspection |
Types of SS 409 Seamless Tubes
Chemical Composition of SS 409 Seamless Tubes
Element | SS 409 | SS 409L |
|---|---|---|
Carbon (C) | 0.08% max | 0.03% max |
Manganese (Mn) | 1.00% max | 1.00% max |
Silicon (Si) | 1.00% max | 1.00% max |
Phosphorus (P) | 0.045% max | 0.045% max |
Sulfur (S) | 0.045% max | 0.045% max |
Chromium (Cr) | 10.50 to 11.75% | 10.50 to 11.75% |
Nickel (Ni) | 0.50% max | 0.50% max |
Titanium (Ti) | 6 x (C + N) min, 0.75% max | 6 x (C + N) min, 0.75% max |
Mechanical Properties of SS 409 Seamless Tubes
Property | SS 409 | SS 409L |
|---|---|---|
Tensile Strength (min) | 380 MPa | 360 MPa |
Yield Strength 0.2% proof (min) | 170 MPa | 170 MPa |
Elongation in 2 in. (min) | 20% | 22% |
Brinell Hardness | 179 HB max | 170 HB max |
Rockwell Hardness | 88 HRB max | 85 HRB max |
SS 409 vs SS 304 vs SS 316 Seamless Tubes Comparison
Feature | SS 409 Seamless Tubes | SS 304 Seamless Tubes | SS 316 Seamless Tubes |
|---|---|---|---|
Type | Ferritic | Austenitic | Austenitic |
Chromium % | 10.5 to 11.75% | 18 to 20% | 16 to 18% |
Nickel % | 0.50% max | 8 to 10.5% | 10 to 14% |
Stabilizer | Titanium | None | None |
Corrosion Resistance | Moderate | Good | Excellent |
Heat Resistance (max) | 700 deg C | 870 deg C | 870 deg C |
Cost | Lowest | Moderate | Higher |
Primary Use | Automotive exhaust | General purpose | Marine and chemical |
Magnetic | Yes | No (annealed) | No (annealed) |
Switching from 304/316 to a lower-cost ferritic grade? Confirm fit for your application.
Request a QuotePhysical Properties of SS 409
Property | Value |
|---|---|
Density | 7.7 g/cm3 |
Melting Range | 1454 to 1510 deg C |
Thermal Conductivity | 24.9 W/m.K |
Thermal Expansion | 11.7 x 10-6 /K (0 to 100 deg C) |
Specific Heat Capacity | 460 J/kg.K |
Electrical Resistivity | 0.60 x 10-6 Ohm.m |
Modulus of Elasticity | 200 GPa |
SS 409 Seamless Pipe Equivalent Material
STANDARD | WERKSTOFF NR. | UNS | JIS | AFNOR | BS | KS | EN |
|---|---|---|---|---|---|---|---|
SS 409 | 1.4512 | S40900 | SUH 409 | - | 409S19 | - | - |
SS 409 Seamless Pipe Applications
- Automotive: Exhaust pipes, mufflers, catalytic converters, tail pipes
- Construction: Structural framing, column covers, roofing components
- Agricultural: Grain dryers, storage silos, agricultural machinery
- Appliances: Water heater flues, range hoods
- Industrial: Heat shields, low pressure fluid lines, process equipment
- Railway: Exhaust systems for diesel locomotives
Related Products
- Stainless Steel 409 Pipes and Tubes
- Stainless Steel 409 Welded Tubes
- Stainless Steel 321 Seamless Tubes
- Stainless Steel 347 Seamless Tubes
- Stainless Steel 304 Seamless Pipe & Tube
- Stainless Steel 316 Seamless Pipe & Tube
- Stainless Steel Seamless Pipes and Tubes
- Stainless Steel Pipes and Tubes
- Stainless Steel 410 Pipes and Tubes
Frequently Asked Questions
Why are SS 409 Seamless Tubes cheaper than 304 or 316 grades?
SS 409 is a ferritic grade with no nickel and lower chromium content, making raw material costs significantly lower than nickel-bearing austenitic grades like 304 or 316.
Can SS 409 Seamless Tubes be bent or formed on-site?
Yes, SS 409 offers good formability and can be bent or shaped using standard tube bending equipment, provided proper tooling and bend radius guidelines are followed.
What documentation comes standard with an SS 409 Tube order?
Each order includes a mill test certificate, dimensional inspection report, and packing list as standard. EN 10204 3.1 certification is included at no extra cost.
Is SS 409 suitable for automotive exhaust fabrication?
Yes, SS 409 is the most widely used ferritic grade for automotive exhaust systems due to its heat resistance up to 700°C and cost-effective performance.
Bulk Supplier of SS 409 Seamless Tubes
USA Piping Solution supplies SS 409 Seamless Tubes in large quantities with fast turnaround times. We offer competitive pricing for automotive, construction, and industrial customers across the world.
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