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BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410

Very competitive price and the tubes are well polished, we are very satisfied with Spezilla from our cooperation since year 2010.

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Spezilla supports our group very well, and now we are approved supplier of goverment, they are reliable and flexible! Spezilla always answers!

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BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410

BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410
BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410 BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410 BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410

Large Image :  BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410

Product Details:
Place of Origin: CHINA
Brand Name: SPEZILLA
Certification: ISO9001, TS16949, PED, AD2000
Model Number: SMLS
Payment & Shipping Terms:
Minimum Order Quantity: 500KGS
Packaging Details: WOODEN BOXED
Delivery Time: Ex-Mill 15 - 30DAYS
Payment Terms: T/T, L/C
Supply Ability: 100TONS/MONTH
Detailed Product Description
Product Name: Ferritc Stainless Steel Tube Shape: Round
Test Certificate: EN10204 3.1 Specification: ASTM A268/ASME SA268
Material Grade: TP409L TP439 TP410 Size Range: 5/8"-2"
WT: BWG18-BWG12 Length: 6096mm
Finishing Options: Pickling, Polishing, Custom Cutting Packaging: Wooden Box, Bundled, Export Packaging Available
Application: Boiler,Heat Exchanger,Automotive
High Light:

industrial stainless steel pipe


ss round tube

Automotive Ferrtic Stainless Steel Tubing ASME SA268 TP409L TP439 TP410


A ferritic stainless steel tube, type 439 outperformsboth type 409 and 436 in oxidation and corrosionresistance in the most-demanding environments. Type439 stainless steel tube withstands temperaturesupwards of 1700˚F (927˚C), exceeding the limits ofboth types 409 and 436.



The grade 446 stainless steel is a ferritic, non-heat treatable stainless steel that provides good resistance to high temperature oxidation and corrosion. The following datasheet provides more details of grade 446 stainless steel.

TP446-1 seamless stainless steel tube, TP446-1 stainless steel tube, TP446-1 seamless steel tube, TP446-1 heat exchanger tube, TP446-1 recuperator tube, S44660 heat exchanger tube, S44660 condenser tube, S44660 super ferritic steel tube.
TP446-1 is a heat-resistance ferritic chromium-alloy stainless steel. It just has very little nickel content and has the following characteristic:
-Material could be used at high temperature up to 1100 grade
-Very good resistance to oxidation in air
-Excellent resistance to reducing sulphurous gas
-Good resistance to oil-ash corrosion
-Good resistance to molten copper, lead and tin
TP446-1 is the ferritic chromium-alloy material. It has the excellent heat-resistance capability and mainly served at temperature above 700, where the excellent resistance of the material to slag corrosion and sulphdizing gas is very obviuos.
The typical applications include the following:
Tube used in the recuperator in the metallurgical and glass industry
Tube used as the thermocouple protection tube
Tube used as the soot blower tube
Tube used as the high temperature injection nozzle
Tube used as the furnace tube in the wire industry

Typical Manufacturing Specifications:





TP409 is a typical martensitic chromium-alloy steel grade. It does not have the nickel content and owns the following characteristic:

- Harding by heat treatment
- High hardness with good ductility
- Good corrosion resistance capability
- Good wear corrosion resistance
- High cold-deformation property



Item Code: TP409
Tube OD.: 1/4'' - 2''
Wall: 0.028'' - 0.120''
Length: 20FT
Material: 405
Standard: ASTM A268 ASME SA268
Finish: Annealed & Pickled.
Type: Seamless Cold Drawn
Certification: ISO9001:2015
Mill Test Certificate: EN10204 3.1
Packing: Sleeved, Wooden Boxed


Grade 409/409L is a titanium stabilized Ferritic Stainless Steel , most commonly known for use in automotive exhaust systems. It features good mechanical properties and high temperature corrosion resistance. As a matter of fact, 409 / 409L as a chromium Stainless Steel can also be used in applications where weldability and corrosion protection are demanded. Although it is susceptible to rust formation, rarely used for decoration purpose, 409 / 409L stainless steel demonstrates excellent corrosion resistance against gas corrosion.


Alloy TP 409 Pipes is suitable for service in highly corrosive conditions and where high strength is required. The properties of this alloy are being widely used in offshore oil and gas exploration and production and in heat exchangers in petrochemical and chemical processing.

Type 409 stainless steel has a unique chemical composition that includes:

  • C 10.5-11.75%
  • Fe 0.08%
  • Ni 0.5%
  • Mn 1%
  • Si 1%
  • P 0.045%
  • S 0.03%
  • Ti 0.75% max

Available Tube Product Forms:




Typical Applications:


Used for parts requiring a combination of good strength and toughness, plus reasonable corrosion resistance. Typical applications are: Bolts, Bushings, Fasteners, Gas Turbine Parts, Mine Equipment, Pump Parts, Petrochemical Equipment, Steam Turbine Parts, Studs, Valve Parts etc.

Material magnetic in all conditions.


The typical applications of grade 409 stainless steels are listed below:

  • Automotive exhaust tubing
  • Catalytic converter systems
  • Mufflers

Heat Resistance

Grade 409 stainless steels offer scaling resistance at temperatures up to 675°C during continuous operation, and up to 815°C under intermittent conditions. These temperatures pertain to specific service environments.

Heat Treatment

Annealing of grade 409 steels is carried out at temperatures ranging from 790 to 900°C, followed by air-cooling. Thermal treatment does not harden grade 409 steels.


Grade 409 steels must be pre-heated to temperatures of 150 to 260°C before welding. Although grade 430 and 409 filler rods or electrodes can be used during welding of grade 409 steels, grade 309 electrodes or filler rods are strongly recommended by AS 1554.6. Care should be taken to weld grade 409 steels with minimum heat, in order to mitigate grain growth.

Ductility of the welded products can be improved by annealing post-welding at temperatures of 760 to 815°C. However, this is not required for thin welded products. Welding of exhaust tubing of automobiles is carried out without filler rods.


Quality Assurance:

Spezilla's seamless bright annealed stainless steel tubes are produced acc. to the following process and inspection to assure our quality:

1. Chemical Composition Analysis Test With 100% PMI.

2. Solution Annealing / Bright Annealed.

3. 100% Hydrostatic Test and 100% Eddy Current Test

4. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test.

5. Impact Test subject to Standard request.

6. Grain Size Test and Intergranular Corrosion Test.

7. Visual Test and Endoscope Test for Surface Quality Test





5% Test
Solution at 120°F
Corrosion Rate in Mils per Year and Millimeters per Year (mm/a)
Alloy 409 Alloy 410S Alloy 420 Alloy 425 Mod Alloy 440A Alloy 430
Acetic Acid 0.88
Phosphoric Acid 0.59



Chemical Composition of ASTM A268 409 S40900 Grade and EN 10088-2 1.4512 1.4516 Stainless Steel
Grade C Mn Si P S Cr Ni Ti
TP409 min. max. - 0.08 - 1.00 - 1.00 - 0.045 - 0.030 10.5 11.7 - 0.50 6×C-0.75
TP409L min. max. - 0.035 - 1.00 - 1.00 - 0.045 - 0.030 10.5 11.7 - 0.50 6×C-0.75
1.4516 min. max. - 0.08 - 1.50 - 0.70 - 0.040 - 0.015 10.5 12.5 0.50-1.50 0.05-0.35
1.4512 min. max. - 0.030 - 1.00 - 1.00 - 0.040 - 0.015 10.5 12.5 - 0.50 6×(C+N)-0.65

Mechanical Properties 


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


Grade Tensile Strength ksi (MPa) min Yield Strength 0.2% Proof
ksi (MPa) min
Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
409 55 (380) 25 (170) 20 95 207
1.4512 380-560 210 25    


BWG18 - BWG12 Automotive Stainless Steel Tubing ASME SA268 TP409L TP439 TP410 0

Contact Details
Spezilla Tube Co., Ltd. (Shanghai)

Contact Person: Will Ma

Tel: +86 13918539222

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