Alloy 31 Seamless Tubes Manufacturer and Supplier Thailand

Alloy 31 seamless tubes are high-performance nickel-based alloy tubes known for their exceptional corrosion resistance, strength and durability in demanding environments. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, is a trusted alloy 31 seamless tube manufacturer and supplier, specializing in premium nickel alloy seamless tubes. Manufactured to ASTM B622 standards, these tubes are ideal for high-temperature and high-pressure applications. We offer alloy 1.4562 seamless tubes in various sizes, thicknesses and lengths with options for different surface finishes. These tubes come with excellent mechanical and physical properties, making them suitable across chemical, marine and power industries.

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Product Overview Of Alloy 31 Seamless Tubes

Alloy 31 Seamless Tubes are high-quality tubes composed of iron, nickel, chromium, & molybdenum alloy, offering excellent resistance to harsh environments. This stabilized austenitic steel is highly resistant to intergranular corrosion, making it ideal for demanding industrial applications. With added chromium and molybdenum, these tubes provide improved strength and stability at high temperatures. Alloy 31 UNS N0831 tubes are available in lengths up to 6000mm, thickness from 0.1mm to 100mm and widths up to 1500mm, with different outer diameters and surface finishes. These Stainless steel tubes are designed to perform reliably in both low and high-temperature environments.

Key Benefits Of Alloy 31 Seamless Tubes

These alloy 31 seamless tubes offer key benefits such as high strength, durability, weldability and more that make them perfect for various applications.

Withstands harsh chemicals and environments, ensuring long-lasting performance in corrosive conditions.

Alloy 31 seamless tubing effectively resists stress corrosion cracking in chloride-containing and acidic environments.

These tubes deliver excellent mechanical strength and long-term durability under demanding conditions.

Reduces maintenance and replacement costs over time, offering better value for long-term projects.

Easy to fabricate and weld without compromising structural integrity or performance.

UNS N08031 tubes are widely used in chemical, marine, power and oil & gas industries due to its adaptable properties.

Why Choose Our Alloy 31 Seamless Tubes

Our Alloy 31 Seamless Tubes are known for their consistent quality, precise dimensions and superior finish. At Thaida, We use high-grade raw materials, follow strict manufacturing standards and ensure timely delivery. Each tube is thoroughly tested for strength and durability, making us a trusted choice for reliable and long-lasting performance.

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Specifications Of UNS N08031 Alloy 31 Seamless Tubes

The detailed alloy 1.4562 tube specifications includes details like grade, specifications, size, thickness, length, end type and other key tube parameters.

Property	Details
Grade	Alloy 31 / UNS N08031 / WNR 1.4562
Specifications	ASTM B622 / ASME SB622
Form	Rectangular, Round, Square etc.
Length	Double Random, Single Random, Cut Length.
End	Beveled End, Plain End, Treaded End.
Type	Seamless
Alloy 31 Seamless Tubes Size	1/2” NB - 8” NB
Thickness	0.3mm – 50 mm
Outer Diameter	6.0 - 630mm

Alloy 1.4562 Seamless Tubes Chemical Composition

The table outlines the chemical composition of Alloy 1.4562, listing elements and their respective percentage content.

Ni	Cr	C	Mn	Si	Cu	Mo	N	P	S	Fe
30.00-32.00	26.00-28.00	≤0.015	≤2.00	≤0.030	1.00-1.40	6.00-7.00	0.15-0.25	≤0.020	≤0.010	Balance

Mechanical Properties UNS N08031 Alloy 31 Seamless Tubes

The alloy 31 seamless tubes mechanical properties such as tensile strength, yield strength and elongation are mentioned below.

Melting Point	Density	Elongation (%)	Tensile Strength (MPa)	Yield Strength (MPa)
1350–1370℃	8.10 g/cm³	≥40	≥650	≥280

Equivalent of Alloy 31 Seamless Tubes

The equivalent table for nickel alloy 31 seamless tubes outlines global standards, grade names, and UNS designations.

STANDARD	WERKSTOFF NR.	UNS	AFNOR	EN
Alloy 20	2.4660	N08020	Z2NCUD31-20AZ	NiCr20CuMo

Physical Properties of Alloy 31 Seamless Tubes

This physical properties table of UNS N08031 seamless tubes includes its density, melting point, thermal conductivity and electrical resistivity.

Property	Value	Unit
Specific Heat (0–100°C)	452	J.kg⁻¹.°K⁻¹
Thermal Conductivity	11.7	W.m⁻¹.°K⁻¹
Thermal Expansion	18.1	mm/m/°C
Modulus of Elasticity	198	GPa
Electrical Resistivity	1.03	μΩ·cm
Density	8.61	g/cm³
Tensile Strength	≥650	MPa
Yield Strength	≥280	MPa

Alloy 31 Seamless Tubes Size Available

The size chart of alloy 31 seamless tubes includes outer diameter, wall thickness, and length specifications for accurate selection.

Pipe Size	O.D. Inches	5s	SCH 5	10s	SCH 10	20	30	40s & STD	SCH 40
1/8	0.405	0.35	0.049	0.049	0.068	0.068
1/8	0.1383	0.1863	0.1863	0.2447	0.2447
1/4	0.54	0.049	0.065	0.065	0.088	0.088
1/4	0.257	0.3297	0.3297	0.4248	0.4248
3/8	0.675	0.049	0.065	0.065	0.091	0.091
3/8	0.3276	0.4235	0.4235	0.5676	0.5676
1/2	0.84	0.065	0.065	0.083	0.083	0.109	0.109
1/2	0.5383	0.5383	0.671	0.671	0.851	0.851
3/4	1.05	0.065	0.065	0.083	0.083	0.113	0.113
3/4	0.6838	0.6838	0.8572	0.8572	1.131	1.131
1	1.315	0.065	0.065	0.109	0.19	0.133	0.133
1	0.8678	0.8678	1.404	1.404	1.679	1.679
1 1/4	1.66	0.065	0.065	0.109	0.109	0.14	0.14
1 1/4	1.107	1.107	1.806	1.806	2.273	2.273
1 1/2	1.9	0.065	0.065	0.109	0.109	0.145	0.145
1 1/2	1.274	1.274	2.638	2.638	2.718	2.718
2	2.375	0.065	0.065	0.109	0.109	0.154	0.154
2	1.604	1.604	2.638	2.638	3.653	3.653
2 1/2	2.875	0.083	0.083	0.12	0.12	0.203	0.203
2 1/2	2.475	2.475	3.531	3.531	5.793	5.793
3	3.5	0.083	0.083	0.12	0.12	0.216	0.216
3	3.029	3.029	4.332	4.332	7.576	7.576
3 1/2	4	0.083	0.083	0.12	0.12	0.226	0.226
3 1/2	3.472	3.472	4.97	4.97	9.109	9.109
4	4.5	0.083	0.083	0.12	0.12	0.237	0.237	0.281
4	3.915	3.915	5.613	5.613	10.79	10.79	12.66
4 1/2	5	0.247
4 1/2	12.53
5	5.563	0.109	0.109	0.134	0.134	0.258	0.258
5	6.349	6.349	7.77	7.77	14.62	14.62
6	6.625	0.109	0.109	0.134	0.134	0.28	0.28
6	7.585	7.585	9.289	9.289	18.97	18.97
7	7.625	0.301
7	23.57
8	8.625	0.109	.109	0.148	0.148	0.25	0.277	0.322	0.322
8	9.914	9.914	13.4	13.4	22.36	24.7	28.55	28.55	35.64
9	9.625	0.342
9	33.9
10	10.75	0.134	0.134	0.165	0.165	0.25	0.307	0.365	0.365
10	15.19	15.19	18.65	18.65	28.04	34.24	40.48	40.48	54.74
11	11.75	0.375
11	45.55
12	12.75	0.156	0.165	0.18	0.18	0.25	0.33	0.375	0.406
12	21.07	22.18	24.2	24.2	33.38	43.77	49.56	53.53	73.16
14	14	0.156	0.188	0.25	0.312	0.375	0.375	0.437	0.593
14	23.06	27.73	36.71	45.68	54.57	54.57	63.67	84.91
16	16	0.165	0.188	0.25	0.312	0.437	0.375	0.562	0.75
16	27.9	31.75	42.05	52.36	62.58	62.58	82.77	107.5
18	18	0.165	0.188	0.25	0.312	0.437	0.375	0.562	0.75
18	31.43	35.76	47.39	59.03	82.06	70.59	104.8	138.2
20	20	0.188	0.218	0.25	0.375	0.5	0.375	0.593	0.812
20	39.78	46.05	52.73	78.6	104.1	78.6	122.9	166.4
24	24	0.218	0.25	0.25	0.375	0.562	0.375	0.687	0.968
24	55.37	63.41	63.41	94.62	140.8	94.62	171.2	238.1
26	26	0.312	0.5	0.375
26	85.6	136.2	102.6
28	28	0.312	0.5	0.625	0.375
28	92.26	146.8	182.7	110.6
30	30	0.25	0.312	0.312	0.5	0.625	0.375
30	79.43	98.93	98.93	157.5	196.1	118.6
32	32	0.312	.5	0.625	0.375	0.688
32	105.6	168.2	209.4	126.7	230.1
34	34	0.312	0.5	0.625	0.375	0.688
34	112.3	178.9	222.8	134.7	244.8
36	36	0.312	0.625	0.375	0.75
36	118.9	236.1	142.7	282.3
40	40	0.375
40	158.7
42	42	0.375
42	166.7
48	48	0.375
48	190.7

Manufacturing Process Of Alloy 31 Seamless Tubes

Here’s a step-by-step process involved in manufacturing nickel alloy 31 seamless tubes. We follow a precise and professional manufacturing process to ensure every tube meets industry standards with perfect finish.

1. Raw Material Selection
High-quality nickel alloy 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.

Application Of Alloy 31 Seamless Tubes

Nickel alloy 31 seamless tubes are mainly used in flue gas desulfurization systems in the power generation industry. They are also utilized in chemical plants, pickling lines, and marine exhaust systems under acidic and chloride-rich conditions.

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 Alloy 31 tube?

Alloy 31 tube is a high-nickel stainless steel tube made for harsh and corrosive work areas. It handles strong acids, salt, heat, and pressure without breaking down. Many plants use it in chemical units, oil and gas systems, and seawater lines. It also works in paper mills, food units, and clean water setups. The tube gives long life, great strength, and safe flow in demanding jobs.

How to weld Alloy 31 tube?

You can weld Alloy 31 tube with standard stainless welding methods like TIG or MIG. Use clean tools and dry filler wire for the best bond. Keep heat low and steady to stop cracking and save the metal’s corrosion strength. Shield gas must stay steady to protect the weld from air contact. Slow cool the welded part and clean the joint area to get a strong, long-lasting weld. Many fabricators pick trained welders for this grade to avoid mistakes and keep quality high.