SS 316LN Seamless Tubes Manufacturer & Supplier in Thailand

Name: Stainless Steel 316LN Seamless Tubes
Brand: Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd.

Stainless Steel 316LN Seamless Tubes is a high-performance tubing product known for its excellent corrosion resistance, superior strength, and durability under extreme conditions. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, specializes in producing premium 316LN seamless tubes to meet the demands of critical industries. With years of tube manufacturing experience, we offer a wide range of sizes and grades, with services like custom cut-to-length and bulk supply tailored to meet project specifications. Manufactured using top-grade DIN 1.4429 / UNS S31653 material, our seamless tubes are ideal for use in chemical processing, marine environments, and power generation sectors. Backed by rigorous quality control, all our products adhere to international standards such as ASTM A269 and API 5L, ensuring performance, reliability, and long service life.

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Product Overview: 316LN Stainless Steel Seamless Tubing

316LN stainless steel is a low-carbon, nitrogen-enhanced version of 316L, offering superior strength, corrosion resistance and performance in harsh environments. The seamless structure of 316LN stainless steel tubing ensures uniformity and strength with no welds, reducing defects and increasing durability. Known for its high-temperature resistance, the AISI stainless steel ASTM A249 316LN seamless tubing performs well under both cryogenic and elevated temperatures, with excellent resistance to stress cracking and intergranular corrosion. These tubes are used in industries such as pharmaceuticals, chemicals, marine, nuclear and power generation and complies with global standards like ASTM A312, DIN 1.4541 and UNS S31653 to ensure reliability and top-quality performance. Additionally, 316LN stainless steel is 100% recyclable, making it an eco-friendly option for sustainable applications.

What material is 1.4404 din?

1.4404 is a grade of austenitic stainless steel, commonly known as 316L. It is a low-carbon version of 316 stainless steel, offering excellent corrosion resistance particularly in chloride environments and is widely used in industries such as chemical processing, marine and pharmaceuticals.

Key Benefits of Stainless Steel 316LN Seamless Tubes

Stainless Steel 316LN Seamless Tubes offers a range of key benefits that make it ideal for harsh environments and high-performance applications.

Designed to withstand harsh environments, ensuring a long service life even in extreme conditions.

Capable of handling high-pressure applications without compromising integrity or performance.

Combines high tensile strength with resistance to stress cracking, making it suitable for heavy-duty applications.

Exhibits excellent ductility, allowing easy shaping and customization for various installation needs.

The seamless structure ensures a leak-proof solution, preventing fluid or gas leaks in critical systems.

Resistant to both cryogenic and elevated temperatures, making it ideal for high-temperature applications.

The low-carbon formulation reduces the risk of carbide precipitation, ensuring improved weldability and corrosion resistance.

Non-magnetic properties make it suitable for sensitive applications where magnetic interference is a concern.

The seamless design provides a smooth surface, reducing friction and preventing bacterial growth in sanitary applications.

Why Choose Thaida for 316LN Stainless Steel Seamless Tubing?

As one of the top stainless steel tube manufacturers, we offer 100% factory price and factory direct sales with fast delivery. Our competitive pricing ensures consistent quality, advanced production technology and international certifications like ASTM and ASME. With a skilled workforce and on-time delivery, we prioritize customer satisfaction, ensuring that every product meets the highest standards of quality.

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What is the difference between 316L and 316LN Seamless Tubes?

316L is a low-carbon version of 316 stainless steel, designed to offer better weldability and reduce carbide precipitation. 316LN, a nitrogen-enhanced version of 316L, provides increased strength and improved resistance to pitting and crevice corrosion. Mechanically, 316LN has higher strength and better flexibility compared to 316L, making it suitable for more demanding applications. While 316L is commonly used in general corrosion-resistant environments, 316LN is ideal for applications requiring higher strength such as in chemical processing, marine engineering and other harsh industrial conditions.

Specification of Stainless Steel 316LN Seamless Tubes

Explore the technical specifications of Stainless Steel 316LN Seamless Tubes to understand its composition, standards, and dimensional range.

Specification	ASTM A-213 & Its equivalent ASME, DIN & EN Standard.
Grades	316LN
Type	Seamless
Outer Diameter Size	1/4” OD, NB to 3” OD, NB sizes
Thickness	1mm to 12mm, SCH 5/5S, 10/10S, 20/20S, 40/40S, 80/80S, 120/120S, 160/160S as per ANSI B36.19/36.10
Length	Up to 6 meters, custom cut lengths
Ends	No.1 Pickled Finish, No.4 finish, BA Finish, Electropolished Seamless Tubes
Delivery Conditions	As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw
Coating	Electropolish, Mechanical Polish, Satin Finish, Passivated
Other Testing	Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiographic Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc
Dimension	All Tubes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME
Value Added Services	Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment
Packaging	Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector

ASTM A213 SS 316LN Seamless Tubes Chemical Composition

This chemical composition table for stainless steel 316LN seamless tubes outlines percentages of major elements like carbon, chromium, nickel, and molybdenum.

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	Other
316LN	≤0.03	≤2.00	≤1.00	≤0.045	≤0.015	16.00-18.00	2.00-2.50	11.00-14.00	N 0.10-0.16

316LN Stainless Steel Seamless Tubes Physical Properties

Below are the physical properties that define the durability and performance of 316LN Stainless Steel Seamless Tubes in demanding environments.

Specific Heat (0-100°C)	485	J.kg⁻¹.°K⁻¹
Thermal Conductivity	16.3	W.m⁻¹.°K⁻¹
Thermal Expansion	16.5	mm/m/°C
Modulus Elasticity	200	GPa
Electrical Resistivity	7.4	μohm/cm
Density	7.99	g/cm³

Stainless Steel 316LN Seamless Tubes Mechanical Properties

Stainless Steel 316LN Seamless Tubes delivers reliable mechanical performance in challenging conditions, with detailed values given below.

PROPERTIES	METRIC	IMPERIAL
Tensile strength	515 MPa	74694 psi
Yield strength	205 MPa	29732 psi
Modulus of elasticity	190-210 GPa	27557-30457 ksi
Poisson’s ratio	0.27-0.30	0.27-0.30
Elongation at break (in 50 mm)	60%	60%

ASTM A213 SS 316LN Seamless Tubes Pressure Rating

The following table presents the pressure ratings of ss 316LN seamless tubes, indicating their capacity to withstand different pressure levels.

OD inches	Ave. Wall inches	Min Yield Strength (PSI)	Min Tensile Strength (PSI)	Theoretical Burst Pressure * (PSI)	Working Pressure (PSI) 25% of Burst	Theoretical Yield Point ** (PSI)	Collapse Pressure *** (PSI)
0.250	0.020	30,000	75,000	14,286	3,571	5,714	4,416
0.250	0.028	30,000	75,000	21,649	5,412	8,660	5,967
0.250	0.035	30,000	75,000	29,167	7,292	11,667	7,224
0.250	0.049	30,000	75,000	48,355	12,089	19,342	9,455
0.250	0.065	30,000	75,000	81,250	20,313	32,500	11,544
0.375	0.020	30,000	75,000	8,955	2,239	3,582	3,029
0.375	0.028	30,000	75,000	13,166	3,292	5,266	4,145
0.375	0.035	30,000	75,000	17,213	4,303	6,885	5,077
0.375	0.049	30,000	75,000	26,534	6,634	10,614	6,816
0.375	0.065	30,000	75,000	39,796	9,949	15,918	8,597
0.500	0.020	30,000	75,000	6,522	1,630	2,609	2,202
0.500	0.028	30,000	75,000	9,459	2,365	3,784	3,172
0.500	0.035	30,000	75,000	12,209	3,052	4,884	3,906
0.500	0.049	30,000	75,000	18,284	4,571	7,313	5,202
0.500	0.065	30,000	75,000	26,351	6,588	10,541	6,786
0.500	0.083	30,000	75,000	37,275	9,319	14,910	8,307
0.625	0.020	30,000	75,000	5,128	1,282	2,051	1,859
0.625	0.028	30,000	75,000	7,381	1,845	2,953	2,568
0.625	0.035	30,000	75,000	9,459	2,365	3,784	3,172
0.625	0.049	30,000	75,000	13,947	3,487	5,579	4,335
0.625	0.065	30,000	75,000	19,697	4,924	7,879	5,591
0.625	0.083	30,000	75,000	27,124	6,781	10,850	6,910
0.625	0.095	30,000	75,000	32,759	8,190	13,103	7,734
0.625	0.109	30,000	75,000	40,172	10,043	16,069	8,639
0.750	0.028	30,000	75,000	6,052	1,513	2,421	2,156
0.750	0.035	30,000	75,000	7,721	1,930	3,088	2,669
0.750	0.049	30,000	75,000	11,273	2,818	4,509	3,664
0.750	0.065	30,000	75,000	15,726	3,931	6,290	4,749
0.750	0.083	30,000	75,000	21,318	5,330	8,527	5,905
0.750	0.095	30,000	75,000	25,446	6,362	10,179	6,637
0.750	0.109	30,000	75,000	30,733	7,683	12,293	7,453
0.750	0.120	30,000	75,000	35,294	8,824	14,118	8,064
0.875	0.020	30,000	75,000	3,593	898	1,437	1,340
0.875	0.028	30,000	75,000	5,128	1,282	2,051	1,859
0.875	0.035	30,000	75,000	6,522	1,630	2,609	2,202
0.875	0.049	30,000	75,000	9,459	2,365	3,784	3,172
0.875	0.065	30,000	75,000	13,087	3,272	5,235	4,126
0.875	0.083	30,000	75,000	17,560	4,390	7,024	5,152
0.875	0.095	30,000	75,000	20,803	5,202	8,321	5,807
0.875	0.109	30,000	75,000	24,886	6,221	9,954	6,543
0.875	0.120	30,000	75,000	28,346	7,087	11,339	7,100
1.000	0.028	30,000	75,000	4,449	1,112	1,780	1,633
1.000	0.035	30,000	75,000	5,645	1,411	2,258	2,027
1.000	0.049	30,000	75,000	8,149	2,037	3,259	2,796
1.000	0.065	30,000	75,000	11,207	2,802	4,483	3,647
1.000	0.083	30,000	75,000	14,928	3,732	5,971	4,567
1.000	0.095	30,000	75,000	17,593	4,398	7,037	5,159
1.000	0.109	30,000	75,000	20,908	5,227	8,363	5,827
1.000	0.120	30,000	75,000	23,684	5,921	9,474	6,336
1.000	0.134	30,000	75,000	27,459	6,865	10,984	6,963
1.250	0.035	30,000	75,000	4,449	1,112	1,780	1,633
1.250	0.049	30,000	75,000	6,380	1,595	2,552	2,260
1.250	0.065	30,000	75,000	8,705	2,176	3,482	2,958
1.250	0.083	30,000	75,000	11,485	2,871	4,594	3,719
1.250	0.095	30,000	75,000	13,443	3,361	5,377	4,213
1.250	0.109	30,000	75,000	15,843	3,961	6,337	4,776
1.250	0.120	30,000	75,000	17,822	4,455	7,129	5,207
1.250	0.134	30,000	75,000	20,468	5,117	8,187	5,742
1.500	0.035	30,000	75,000	3,671	918	1,469	1,367
1.500	0.049	30,000	75,000	5,243	1,311	2,097	1,896
1.500	0.065	30,000	75,000	7,117	1,779	2,847	2,487
1.500	0.083	30,000	75,000	9,333	2,333	3,733	3,136
1.500	0.095	30,000	75,000	10,878	2,719	4,351	3,559
1.500	0.109	30,000	75,000	12,754	3,188	5,101	4,043
1.500	0.120	30,000	75,000	14,286	3,571	5,714	4,416
1.500	0.134	30,000	75,000	16,315	4,079	6,526	4,881
1.500	0.148	30,000	75,000	18,439	4,610	7,375	5,336
1.750	0.035	30,000	75,000	3,125	781	1,250	1,176
1.750	0.049	30,000	75,000	3,864	966	1,546	1,434
1.750	0.065	30,000	75,000	6,019	1,505	2,407	2,146
1.750	0.083	30,000	75,000	7,860	1,965	3,144	2,711
1.750	0.095	30,000	75,000	9,135	2,284	3,654	3,080
1.750	0.109	30,000	75,000	10,672	2,668	4,213	3,504
1.750	0.120	30,000	75,000	11,921	2,980	4,768	3,832
1.750	0.134	30,000	75,000	13,563	3,391	5,425	4,242
1.750	0.148	30,000	75,000	15,268	3,817	6,107	4,645
1.750	0.165	30,000	75,000	17,430	4,357	6,972	5,124
2.000	0.035	30,000	75,000	2,720	680	1,088	1,032
2.000	0.049	30,000	75,000	3,864	966	1,546	1,434
2.000	0.065	30,000	75,000	5,214	1,303	2,086	1,887
2.000	0.083	30,000	75,000	6,788	1,697	2,715	2,387
2.000	0.095	30,000	75,000	7,873	1,968	3,149	2,715
2.000	0.109	30,000	75,000	9,175	2,294	3,670	3,092
2.000	0.120	30,000	75,000	10,227	2,557	4,091	3,384
2.000	0.134	30,000	75,000	11,605	2,901	4,642	3,751
2.000	0.148	30,000	75,000	13,028	3,257	5,211	4,111
2.000	0.165	30,000	75,000	14,820	3,705	5,928	4,542

ASTM A213 SS 316LN Equivalent

This table compares ss 316LN to equivalent materials, highlighting alternative standards and their compatibility.

STANDARD	WERKSTOFF NR.	UNS	EN
SS 316LN	1.4429	S31653	X2CrNiMoN17-13-3

Stainless Steel 316LN Seamless Tubes Manufacturing Process

There are 5 steps involved in the stainless steel UNS S31653 seamless tube manufacturing process which are given below. Every step of production is precisely controlled to comply with stringent industry standards.

1. Raw Material Selection
High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.

2. Tubes Formation
The selected raw material is formed into tubes using seamless extrusion methods, depending on the application.

3. Heat Treatment
Tubes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working and Finishing
After heat treatment, tubes are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing
Every tube is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Applications of Stainless Steel 316LN Seamless Tubes

Stainless Steel 316LN seamless tubes are primarily used in the chemical and petrochemical industry for handling corrosive fluids, high-purity gases, and aggressive solvents, making it the sector with the highest demand. These tubes are installed in heat exchangers, reactors, and processing lines where high strength and resistance to intergranular corrosion are essential. Additionally, they are used in power generation for superheaters and reheaters, and in marine environments for condensers and fluid transport systems. Their stable performance under high temperature and pressure makes them a trusted choice in critical operations.

Oil and Gas Industry

Chemical and Petrochemical Industry

Food and Beverage Industry

Pharmaceutical & Biotechnology

Aerospace & Defense

Automotive and Transportation

Construction and Architecture

Marine & Shipbuilding

Power Generation & Heat Exchange

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FAQ's

What is 316LN stainless steel tube?

316LN stainless steel tube is a low-carbon, nitrogen-enhanced grade of 316 stainless steel. It offers excellent corrosion resistance, high strength, and reliable performance in both cryogenic and high-stress environments, making it ideal for demanding industrial applications.

What is the difference between AISI 316L and 316LN tube?

316LN stainless steel differs from 316L mainly by its added nitrogen content (0.10–0.16%), which enhances strength and corrosion resistance. While both grades have low carbon levels for excellent weldability and resistance to intergranular corrosion, 316LN offers higher yield and tensile strength along with improved resistance to pitting and crevice corrosion. As a result, 316L is commonly used in chemical, food, and marine industries, whereas 316LN is preferred for high-strength and critical applications such as nuclear, cryogenic, and high-pressure systems.

What is the composition of ss316ln tube?

SS316LN (UNS S31653) is a low-carbon, nitrogen-enhanced version of 316 stainless steel, primarily composed of iron with key alloying elements like chromium (16–18%), nickel (10–14%), and molybdenum (2–3%). The “L” denotes low carbon for improved weldability, while the added nitrogen (0.10–0.16%) enhances strength and corrosion resistance, making it more robust than standard 316.

What is the magnetic permeability of stainless steel 316LN tube?

The magnetic permeability of annealed 316LN stainless steel tube is very low, typically below 1.02 and sometimes around 1.005, making it essentially nonmagnetic in this state. However, processes like cold working or welding can slightly increase permeability due to the formation of small amounts of ferrite or martensite, though it remains largely nonmagnetic overall.