ASTM A182 304 304H 304L 304N 304LN Stainless Steel Tube Austenitic Stainless Steel Pipe For High-Temperature Service
Material
ASTM A182 covers forged or rolled alloy and stainless steel pipe flanges, fittings, and valves for high-temperature service. The grades 304, 304H, 304L, 304N, and 304LN are austenitic stainless steels known for their excellent corrosion resistance and high-temperature strength.
Specification
The specification outlines the requirements for the chemical composition, mechanical properties, and manufacturing processes of these stainless steel grades. They are primarily used in high-temperature applications, such as in power generation, petrochemical, and chemical processing industries.
Key Features
- Corrosion Resistance: Excellent resistance to a wide range of corrosive environments.
- High-Temperature Strength: Maintains strength and stability at elevated temperatures.
- Versatility: Suitable for various applications, including pressure vessels and piping systems.
- Weldability: Good weldability, allowing for easy fabrication and assembly.
Chemical Composition
| Grade | C (%) | Cr (%) | Ni (%) | Mn (%) | Si (%) | P (%) | S (%) |
| 304 | 0.08 max | 18.0-20.0 | 8.0-10.5 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| 304H | 0.04-0.10 | 18.0-20.0 | 8.0-10.5 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| 304L | 0.03 max | 18.0-20.0 | 8.0-12.0 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| 304N | 0.08 max | 18.0-20.0 | 8.0-10.5 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| 304LN | 0.03 max | 18.0-20.0 | 8.0-12.0 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
| 304 | 205 | 515-720 | 40 | 201 |
| 304H | 205 | 515-720 | 40 | 201 |
| 304L | 170 | 480-620 | 40 | 197 |
| 304N | 205 | 515-720 | 40 | 201 |
| 304LN | 205 | 515-720 | 40 | 201 |
Steel Grade
The steel grades 304, 304H, 304L, 304N, and 304LN are commonly used in various applications due to their unique properties. Each grade has specific characteristics that make it suitable for different environments and conditions.
Application
These stainless steel grades are widely used in:
- Power Generation: Boiler tubes and heat exchangers.
- Chemical Processing: Piping systems and storage tanks.
- Oil and Gas: Equipment and piping in high-temperature environments.
- Food and Beverage: Processing equipment that requires corrosion resistance.
Possible Alternative Grades
While 304 series stainless steels are popular, alternative grades may be considered based on specific requirements:
- 316 Stainless Steel: Offers better corrosion resistance, especially in chloride environments.
- 321 Stainless Steel: Provides improved high-temperature stability.
- 310 Stainless Steel: Suitable for high-temperature applications due to its higher chromium and nickel content.
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.
