Inconel 718 Seamless Tube Manufacturer & Supplier in Thailand

Inconel 718 Seamless Tubes are high-strength, corrosion-resistant tubes crafted from a nickel-chromium alloy known for exceptional performance in extreme environments. Thaida produces Inconel 718 seamless tubes at our advanced facility in Chon Buri, Thailand, combining years of pipe manufacturing experience with modern technology. As a trusted stainless steel seamless tube supplier in Chon Buri, our offerings are designed to meet the demanding needs of industries such as aerospace, oil & gas, marine, and power generation. We offer a wide range of sizes and grades, along with key services like custom cut-to-length tubing and bulk supply solutions. Every Inconel tube is manufactured with precision and tested for durability and compliance, ensuring consistent quality for critical applications.

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Overview of Inconel 718 Seamless Tubes

Inconel 718 seamless tubes are made from a nickel-chromium alloy, known for their exceptional mechanical strength and durability. Inconel 718 material is a high-temperature alloy specifically developed to perform in extreme heat and pressure environments. It contains a balanced composition of nickel, chromium, iron, niobium and molybdenum, which together provide excellent resistance to corrosion, oxidation and stress corrosion cracking. These seamless nickel alloy tubes are manufactured without any welded joints using a controlled extrusion or piercing process.

The seamless design is critical for ensuring uniform strength throughout the tube’s structure. The absence of welds eliminates potential weak spots, ensuring better performance and longer service life under dynamic loads and thermal cycling. These corrosion-resistant tubes conform to ASTM B983 standards, ensuring consistent quality and dimensional accuracy. It maintains strength even at elevated temperatures, making it suitable for heat exchangers, jet engines and high-pressure chemical processing.

Benefits of Inconel 718 Seamless Tubes

Following are the benefits of inconel 718 seamless tubes that make them a reliable choice for demanding industrial applications.

Performs reliably in environments with temperatures up to 700°C without losing mechanical strength.

These tubes withstand harsh environments including acids, seawater and oxidizing conditions without degradation.

Maintains excellent tensile, yield and creep-rupture strength even under high-pressure operations.

The tube’s uniform and joint-free construction ensures superior pressure handling and eliminates weak points.

718 inconel seamless tubes can be easily machined and welded without compromising structural strength or material integrity.

Durable and reliable, reducing maintenance frequency and replacement costs over time.

Why Choose Our Inconel 718 Seamless Tubes?

Thaida Stainless Steel Manufacturing (Thailand) Co. Ltd. is your trusted partner for Inconel seamless tubes, offering custom sizes and grades. With global supply capability and a customer-centric approach, we provide strict quality standards through comprehensive product testing, in-house testing, and full traceability. As a direct manufacturer, we ensure consistent quality, precision manufacturing, and compliance with ASTM/ASME standards, make us a smart choice for all your Inconel tube needs.

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Inconel 718 Seamless Tubes Specification

Below is the specification of Inconel 718 seamless tubes, including international specification, standard, wall thickness and surface finish.

ASTM Specification	ASTM B167, ASTM B163
Standard	GB, DTD, ASME, AISI, ASTM, TOCT, JIS, NF, SAE, DIN, AMS, DS, EN
International Specification	WERKSTOFF Nr 2.4668 , UNS N07718
Seamless Tubes Size	3.35 millimeter To 101.6 Ccommercial OD
Bwg & Swg	18 Swg., 14 20 Swg., Swg. Swg., 12 16 Swg., 10 Swg.
Tubing wall thickness	0.020" –0.220", (custom wall thicknesses available)
Length	Standard & Cut length , Single Random, Double Random Tubes
Finish	AP (Annealed & Pickled), BA (Bright & Annealed) etc
End	Plain End, Beveled End, Treaded Tubes, Screwed ends
Marking	Heat No. (Or as per need.), Thickness, OD, Grade, Standard Length
Value Added Service	Expansion and Draw as per needed Length and Size, Polish (Commercial and Electro), Machining, Annealed & Pickled Bending Etc.
manufacturing Technique	Cold drawn, hot drawn, bright annealed, solid solution, hot extruding

Alloy 718 Nickel Seamless Tubing Chemical Composition

Below is the chemical composition of Inconel Alloy 718 seamless tube, detailing the percentages of nickel, chromium, iron and other elements.

Grade	C	Mn	Si	P	S	Cr	Cb	Mo	Co	Ta	Ti	Al	B	Fe	Ni	Cu
UNS N07718	≤0.08	≤0.35	≤0.35	≤0.015	≤0.015	17.00 - 21.00	≤1.00	2.80 - 3.30	4.75 - 5.50	0.05	0.65 - 1.15	0.20 - 0.80	≤0.006	Bal	50.00 - 55.00	≤0.30

Inconel 718 Seamless Tubes Mechanical Properties

Here are the mechanical properties of Inconel Alloy 718 seamless tube, including tensile strength, yield strength and elongation.

Property	1000 psi	MPa
Yield Strength (0.2% offset)	159.0	1096
Tensile Strength	191.5	1320
Elongation %	20
Rockwell Hardness	40C

Alloy 718 Seamless Tubes Sizes

This table shows available size options for alloy 718 tubes, covering outer diameter, wall thickness and standard lengths.

Regular Wall (RW) mm	Gauge	Extra Thin Wall (XTW) mm	Outside Diameter Tolerance mm	Ultra Thin Wall (UTW) mm	Thin Wall (TW) mm
0.0064 to 0.0089	30		0.0304 to 0.0317
0.0064 to 0.0089	29		0.0330 to 0.0342
0.0076 to 0.0102	28		0.0355 to 0.0368
0.0089 to 0.0115	27		0.0406 to 0.0419		0.0064 to 0.0089
0.0089 to 0.0114	26		0.0457 to 0.0469
0.0115 to 0.0140	25		0.0508 to 0.0520		0.0089 to 0.0114
0.0114 to 0.0140	24		0.0558 to 0.0571	0.0051 to 0.0102	0.0089 to 0.0114
0.0140 to 0.0165	23		0.0635 to 0.0647	0.0051 to 0.0102	0.0089 to 0.0114
0.0140 to 0.0165	22	0.0077 to 0.0102	0.0711 to 0.0723	0.0051 to 0.0102	0.0096 to 0.0121
0.0140 to 0.0165	21		0.0812 to 0.0825	0.0051 to 0.0102	0.0102 to 0.0127
0.0108 to 0.0165	20		0.0901 to 0.0914		0.0108 to 0.0134
0.0166 to 0.0216	19	0.0070 to 0.0108	1.0054 to 1.0079		0.0102 to 0.0140
0.0191 to 0.0241	18	0.0083 to 0.0121	1.0257 to 1.0282	0.0051 to 0.0102	0.0127 to 0.0165
0.0177 to 0.0229	17	0.0083 to 0.0127	1.0460 to 1.0485	0.0057 to 0.0102	0.0115 to 0.0152
0.0204 to 0.0254	16	0.0096 to 0.0133	1.0638 to 1.0663	0.0070 to 0.0121	0.0127 to 0.0165
0.0204 to 0.0254	15	0.0096 to 0.0134	1.0816 to 1.0841	0.0070 to 0.0121	0.0127 to 0.0165
0.0216 to 0.0292	14	0.0114 to 0.0165	2.0082 to 2.0133	0.0076 to 0.0134	0.0165 to 0.0229
0.0267 to 0.0343	13		2.0387 to 2.0438		0.0191 to 0.0267
0.0267 to 0.0321	12		2.0743 to 2.0749
0.0293 to 0.0368	11		3.0023 to 3.0073		0.0216 to 0.0292
0.0318 to 0.0394	10	0.0216 to 0.0292	3.0378 to 3.0429

Inconel 718 Seamless Tubes Manufacturing Process

The process of manufacturing inconel 718 seamless tube is divided into five stages which are outlined below.

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

2. Tube 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 Inconel 718 Seamless Tubes

Inconel 718 seamless tubes are used in the aerospace industry for components like aircraft engine casings, turbine blades, and exhaust systems, making it the leading sector in terms of usage. These tubes are chosen for their ability to endure extreme heat and mechanical stress in high-performance jet engines. In the oil and gas sector, they are used in downhole tools, wellhead components, and high-pressure pipelines, where resistance to pressure and corrosion is critical. Power generation plants use Inconel 718 tubes in nuclear reactors and gas turbines due to their long-term stability in high-temperature environments.

Aerospace & Defense

Oil and Gas Industry

Chemical and Petrochemical Industry

Power Generation & Heat Exchange

Automotive and Transportation

Construction and Architecture

Food and Beverage Industry

Marine & Shipbuilding

Pharmaceutical & Biotechnology

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