USA Piping Solution is manufacturer, stockist and exporter of Stainless Steel 409 Welded Tubes, also known as SS 409 Welded Tubes or SS 409 ERW Tubes. Grade 409 is a low chromium ferritic stainless steel with titanium stabilization that offers adequate high-temperature oxidation resistance, good formability and weldability at a cost effective price point. Our SS 409 Welded Tubes are made by the electric resistance welding process from the quality tested strip and delivered in Annealed and Pickled condition. These tubes are manufactured to the ASTM A249, ASTM A554 and EN 10217-7 standards. Automotive exhaust systems, agricultural equipment, heat shields, water heater flues and general structural applications are among the many uses where SS 409 Welded Tubes from USA Piping Solution are used where moderate corrosion resistance is acceptable.
Stainless Steel 409 Welded Tubes Specifications
Parameter | Details |
|---|---|
Grade | SS 409 / SS 409L |
Standard | ASTM A249, ASTM A554, ASTM A269, EN 10217-7 |
Manufacturing Method | ERW (Electric Resistance Welded) |
OD Range | 6.35 mm to 304.80 mm |
Wall Thickness | 0.5 mm to 12.70 mm |
Length | 1 m to 6 m, random or fixed |
End Finish | Plain End, Beveled End |
Surface Finish | 2B, Pickled and Annealed, Bright Annealed |
Delivery Condition | Annealed |
Testing | Hydrostatic Test, Eddy Current Test, Flattening Test |
Documentation | Mill Test Certificate, EN 10204 3.1, Third Party Inspection |
Types of SS 409 Welded Tubes
- ASTM A249 SS 409 Welded Tubes
- ASTM A554 SS 409 Welded Tubes
- SS 409L Welded Tubes (Low Carbon)
- SS 409 ERW Tubes
- SS 409 Automotive Exhaust Welded Tubes
- SS 409 Square Welded Tubes
- SS 409 Rectangular Welded Tubes
- SS 409 Round Welded Tubes
- SS 409 Ornamental Welded Tubes
- SS 409 Structural Welded Tubes
Source SS 409 Welded Tubes for automotive exhaust and structural applications — ERW process, ASTM A268 / A554, OD 6.35 mm to 304.80 mm, annealed and pickled condition.
Contact USA Piping Solution for bulk pricing and delivery schedule.
Get a QuoteChemical Composition of SS 409 Welded 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 Welded Tubes
Property | SS 409 | SS 409L |
|---|---|---|
Tensile Strength (min) | 380 MPa | 360 MPa |
Yield Strength 0.2% (min) | 170 MPa | 170 MPa |
Elongation in 2 in. (min) | 20% | 22% |
Brinell Hardness | 179 HB max | 170 HB max |
SS 409 Welded Pipe Equivalent Material
STANDARD | WERKSTOFF NR. | UNS | JIS | BS | AISI | AFNOR |
|---|---|---|---|---|---|---|
SS 409 | 1.4512 | S40900 | SUS 409 | 409 S 19 | 409 | Z3CT12 |
ASTM A249 vs ASTM A554 for SS 409 Welded Tubes
Feature | ASTM A249 | ASTM A554 |
|---|---|---|
Primary Application | Boiler, superheater, heat exchanger tubes | Mechanical and ornamental applications |
OD Range Covered | Up to 76.20 mm | Up to 304.80 mm |
Testing Focus | Hydrostatic / Eddy Current, Flattening | Flattening, Reverse Flattening |
Weld Condition | Full anneal required | Full anneal required |
Finish | Pickled, BA | Polished, Mill |
Applicable Temperature | High temperature service | Room to moderate temperature |
Typical Users | Power plants, chemical plants | Architecture, automotive, structural |
Tolerances for SS 409 Welded Tubes
Parameter | Tolerance |
|---|---|
OD (up to 50.80 mm) | +/- 0.10 mm |
OD (50.80 mm to 101.60 mm) | +/- 0.15 mm |
OD (above 101.60 mm) | +/- 0.25 mm or +/- 0.5%, whichever is greater |
Wall Thickness | +20%, -0% |
Straightness | 3.0 mm per 3.0 m max |
Length (cut to length) | +6.4 mm, -0 |
Ovality (OD 25.40 mm and under) | 0.13 mm max |
Corrosion Resistance of SS 409 Welded Tubes
Environment | Resistance Level |
|---|---|
Atmospheric Corrosion (rural and urban) | Good |
Mild Acid Environments (dilute) | Moderate |
Mildly Alkaline Environments | Good |
High Temperature Oxidation (up to 700 deg C) | Good |
Strong Acids (sulphuric, hydrochloric) | Poor |
Marine Environments (seawater) | Limited |
Automotive Exhaust Condensates | Good |
Applications of SS 409 Welded Tubes
Industry | Application |
|---|---|
Automotive | Exhaust pipes, catalytic converter shells, mufflers, downpipes |
Construction | Structural columns, architectural cladding, roofing trim |
Agricultural | Crop dryers, grain elevator ducts, irrigation channels |
Appliances | Water heater flue tubes, range hood ducting |
Rail Transport | Diesel locomotive exhaust tubing |
Industrial | Heat shields, low pressure pneumatic lines, furnace parts |
Power Generation | Low temperature exhaust stacks, flue gas ducts |
Related Products
- Stainless Steel 409 Pipes and Tubes
- Stainless Steel 409 Seamless Tubes
- Stainless Steel 321 Welded Tubes
- Stainless Steel 347 Welded Tubes
- Stainless Steel 304 Welded Pipe & Tube
- Stainless Steel Welded Pipes and Tubes
- Stainless Steel 410 Pipes and Tubes
- Stainless Steel Pipes and Tubes
Frequently Asked Questions
Can SS 409 Welded Tubes be supplied with a mirror or satin finish?
Yes, SS 409 Welded Tubes can be supplied with 2B, No. 4, satin, or mirror polish finishes depending on whether the application is structural or decorative.
What is the cost advantage of choosing SS 409 over 316 welded tubes?
SS 409 typically costs 30 to 50 percent less than SS 316 welded tubes due to the absence of nickel and molybdenum, making it ideal for cost-sensitive, mild-service projects.
Do you accept small trial orders for new automotive customers?
Yes, we accommodate small trial orders for automotive and structural customers who want to verify quality and fit before committing to a full production quantity.
Are SS 409 Welded Tubes tested for weld seam integrity?
Yes, every batch undergoes flattening and hydrostatic or eddy current testing to confirm weld seam integrity before tubes are approved for dispatch.
SS 409 Welded Tubes for Automotive and Industrial Use
USA Piping Solution offers competitive pricing on SS 409 Welded Tubes in round, square, and rectangular sections. Contact our team for bulk pricing and custom fabrication options.
Get a Quote