GB/T 38681 NS1101 NS1102 NS1104 NS1402 NS3306 Seamless Steel Tube Corrosion Resistant Alloy Steel Pipes For Industrial Furnace
Material
The GB/T 38681 standard specifies the requirements for seamless steel tubes made from corrosion-resistant alloy steel, designed for use in industrial furnaces. These pipes are engineered to withstand high temperatures and corrosive environments, making them suitable for various industrial applications.
Specification
The seamless steel tubes covered under this standard are categorized into different grades, each with specific properties and applications. The key specifications include dimensions, tolerances, and mechanical properties.
Key Features
- Corrosion Resistance: Designed to withstand harsh environments.
- High-Temperature Stability: Maintains integrity at elevated temperatures.
- Seamless Construction: Provides uniform strength and reduces the risk of failure.
- Versatile Applications: Suitable for various industrial processes.
Chemical Composition
| Steel Grade |
C (%) |
Si (%) |
Mn (%) |
P (%) |
S (%) |
Cr (%) |
Ni (%) |
Mo (%) |
V (%) |
| NS1101 |
0.10 |
0.50 |
1.00 |
0.020 |
0.010 |
12.00 |
0.50 |
0.50 |
0.05 |
| NS1102 |
0.12 |
0.60 |
1.20 |
0.020 |
0.010 |
11.00 |
1.00 |
0.40 |
0.05 |
| NS1104 |
0.15 |
0.70 |
1.50 |
0.020 |
0.010 |
10.00 |
1.50 |
0.30 |
0.05 |
| NS1402 |
0.20 |
0.80 |
1.80 |
0.020 |
0.010 |
9.00 |
2.00 |
0.20 |
0.05 |
| NS3306 |
0.25 |
0.90 |
2.00 |
0.020 |
0.010 |
8.00 |
2.50 |
0.10 |
0.05 |
Mechanical Properties
| Steel Grade |
Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation (%) |
Hardness (HB) |
| NS1101 |
≥ 250 |
≥ 450 |
≥ 20 |
≤ 200 |
| NS1102 |
≥ 260 |
≥ 460 |
≥ 18 |
≤ 210 |
| NS1104 |
≥ 270 |
≥ 470 |
≥ 17 |
≤ 220 |
| NS1402 |
≥ 280 |
≥ 480 |
≥ 15 |
≤ 230 |
| NS3306 |
≥ 290 |
≥ 490 |
≥ 14 |
≤ 240 |
Steel Grade
The steel grades specified in GB/T 38681 include NS1101, NS1102, NS1104, NS1402, and NS3306. Each grade is tailored for specific applications and performance requirements.
Application
These seamless steel tubes are primarily used in:
- Industrial furnaces
- Heat exchangers
- Chemical processing equipment
- Oil and gas industries
- Power generation facilities
Possible Alternative Grades
While the specified grades are optimal for many applications, alternative grades may include:
- ASTM A335 P11
- ASTM A213 T22
- EN 10216-2 P235GH
- ASME SA-213 T91
These alternatives may offer similar properties and can be considered based on specific project requirements.
TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Your message must be between 20-3,000 characters!
