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409L STAINLESS STEEL TUBE

409L stainless steel tube

409L stainless steel tube is a low-carbon ferritic alloy, prized for its corrosion resistance due to its 10.5%-11.7% chromium content. The low carbon content improves weldability and lessens post-weld corrosion risks, making it ideal for high-temperature applications like automotive exhaust systems, where it also resists thermal fatigue. It also exhibits good thermal conductivity and a low expansion coefficient, ensuring stable performance across temperatures. Moreover, its mechanical properties amd formability are increased when annealing. Cost-effective and durable, 409L stainless steel tube offers a practical solution for many applications requiring corrosion resistance.

Standards and Specifications

STANDARDS
OD
WT
STANDARDS
OD
WT
mm
inch
mm
ga
ASTM A554
8-323
0.315"-12 3/4"
0.6-6.0
24ga-4ga
ASTM 249/269
15.88-203.2
0.6252"-8"
0.6-3.0
24ga-11ga
ASTM A270
15.88-203.2
0.6252"-8"
1.0-3.0
20ga-11ga
EN 10296-2
8-323
0.315"-12 3/4"
0.6-6.0
24ga-4ga
EN 10217-7
12-323
0.4724"-12 3/4"
0.6-6.0
24ga-4ga
EN 10357
13-204
0.5118"-8"
1.0-3.0
20ga-11ga

CHEMICAL COMPOSITION &
MECHANICAL PROPERTIES

CHEMICAL COMPOSITION AND MECHANICL PROPERTIES

Typical Chemical Composition % (max values, unless noted)
Grade
C
Mn
P
S
Si
Ni
Cr
Mo
409L
0.03
1.0 max
0.04
0.02
1.00
0.5 max
10.5-11.7
Typical Mechanical Properties
Grade
Tensile Strength
Yield Strength
Elongation in 2 in. or (50mm)
Brinell Hardness
Rockwell Hardness
min
min
min
max
max
ksi
Mpa
ksi
Mpa
%
409L
55
379
30
207
20
190
90

Area we serve

AUTOMOTIVE EXHAUST SYSTEM
409L stainless steel tube is highly favored for automotive exhaust systems due to its exceptional corrosion resistance and thermostability. It stands up to high temperatures and harsh conditions, enabling efficient exhaust gas release. Its ability to resist corrosion from moisture, chemicals, and combustion gases ensures durability and prolongs the lifespan of exhaust systems. Additionally, the thermostability of the 409L is critical for the exhaust system, where high temperatures are generated intensely. The material can endure the heat generated during combustion without distortion or alteration, thereby preserving the appropriate form and function of the exhaust system. In addition to the abovementioned two attributes, 409L tube is also renowned for its cost-effectiveness, making it the preferred choice for automakers.
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CONSTRUCTION INDUSTRY
409L stainless steel tube is widely utilized across various segments of the construction industry due to its outstanding corrosion resistance and high-temperature tolerance. Its ability to resist corrosion makes it ideal for drainage systems, ensuring long-lasting performance by preventing deterioration from water and liquids. For ventilation systems, 409L's corrosion resistance ensures air purity and efficient circulation, crucial for maintaining indoor air quality. In heating systems, particularly for chimney flues, the combination of its resistance to corrosion and ability to withstand high temperatures promotes the safe and effective release of combustion gases. Additionally, 409L stainless steel's durability and strength make it suitable for structural applications such as frameworks and supports, underscoring its versatility in construction projects.
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PETROCHEMICAL INDUSTRY
In the petrochemical industry, 409L stainless steel tube is critical for its outstanding corrosion resistance, durability, and cost-effectiveness. It is widely used in conduit systems for the transport of crude oil, natural gas and petrochemical products, where its ability to withstand harsh chemicals and sour gases is crucial. For thermal management, its thermal stability makes it ideal for heat exchangers in distillation and refining processes. 409L is also chosen for storage tanks due to its resistance to oxidation and corrosion, preventing leaks and environmental damage. Additionally, its structural integrity is leveraged in constructing supports and frameworks in corrosive and high-stress petrochemical environments, also in the fabrication of reactors, separators, and other process equipment, ensuring long-term reliability and chemical resistance.
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409L stainless steel tube FAQ

When compared to 430 and 439, 409L stainless steel tube is slightly less resistant to corrosion due to its chromium content, but Its low nickel and high carbon content make it one of the most economical stainless steels available. So 409L is still a better option than mild carbon steel in terms of corrosion.
Neither type of stainless steel is 100% rust-proof. However, due to the chromium element (10.5%-11.7%) in 409L, with other alloying elements are added, 409L stainless steel tube is still more rust-resistant than Mild Steel.
The 'L' signifies a lower carbon content, which enhances the material's weldability and corrosion resistance compared to 409 stainless steel tube.
409L stainless steel tube can withstand temperatures up to approximately 675°C (1250°F) while maintaining good mechanical properties.
Like other 400 grade stainless steel, 409L is magnetic because of its iron content.
409L stainless steel tube not only offers excellent corrosion, oxidation and high temperature resistance, but also is easy to form and weldable. Besides, the price of 409L is much lower compared to other grades of stainless steel. So if you possess minimal stringent expectations regarding material standard and performance, 409L stainless tube offers a more cost-effective alternative.
It is EN 1.4512.
First is the high temperatuure resistance of 409L which enables it to facilitate efficient engine and exhaust system operation, and it also allows for a reduction in the thickness of the exhaust system, leading to a decrease in exhaust emissions. Furthermore, 409L stainless steel is cost-effective, flexible, boasts a high yield, and is easy to replace, making it a highly environmentally friendly product. Therefore, 409L stainless steel is widely used in automotive pipe manifolds, exhaust pipes, catalytic converters, silencers and tail pipes.
To maximize the lifespan of 409L stainless steel tube, it should be cleaned regularly, protected from chlorides and other corrosive substances, and inspected periodically for signs of wear or damage.
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