BS 3605 304 304S11 304S31 316S11 316S13 316S31 Stainless Steel Pipe: Austenitic Stainless Steel Pipe And Tubes For Pressure Purposes
Material Specification
BS 3605 is a British Standard specification for austenitic stainless steel pipes and tubes designed for pressure purposes. This specification covers several grades, including 304, 304S11, 304S31, 316S11, 316S13, and 316S31. These grades are known for their excellent corrosion resistance, high strength, and good formability, making them suitable for various industrial applications.
Key Features
- Corrosion Resistance: Excellent resistance to a wide range of corrosive environments.
- High Strength: Suitable for high-pressure applications.
- Good Formability: Easily fabricated into various shapes and sizes.
- Temperature Resistance: Maintains strength and toughness at both high and low temperatures.
- Hygienic Properties: Ideal for applications requiring cleanliness, such as food processing and pharmaceuticals.
Chemical Composition
The chemical composition of these stainless steel grades is crucial for their performance. Below is a table summarizing the typical chemical composition for each grade:
| Element | 304 / 304S11 / 304S31 | 316S11 / 316S13 / 316S31 |
| Carbon (C) | ≤ 0.07% | ≤ 0.08% |
| Silicon (Si) | ≤ 1.00% | ≤ 1.00% |
| Manganese (Mn) | ≤ 2.00% | ≤ 2.00% |
| Phosphorus (P) | ≤ 0.045% | ≤ 0.045% |
| Sulfur (S) | ≤ 0.030% | ≤ 0.030% |
| Chromium (Cr) | 18.00-20.00% | 16.00-18.00% |
| Nickel (Ni) | 8.00-10.50% | 10.00-14.00% |
| Molybdenum (Mo) | - | 2.00-3.00% |
Mechanical Properties
The mechanical properties of these stainless steel grades are essential for ensuring their suitability for pressure applications. The table below provides an overview of the typical mechanical properties:
| Property | 304 / 304S11 / 304S31 | 316S11 / 316S13 / 316S31 |
| Tensile Strength (MPa) | ≥ 515 | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 | ≥ 205 |
| Elongation (%) | ≥ 40 | ≥ 40 |
| Hardness (HB) | ≤ 201 | ≤ 217 |
Steel Grade
The BS 3605 specification includes several grades of austenitic stainless steel, each with unique properties tailored for specific applications. The primary grades covered are:
- 304 / 304S11 / 304S31: Known for their excellent corrosion resistance and formability, these grades are widely used in various industries.
- 316S11 / 316S13 / 316S31: Enhanced with molybdenum for improved corrosion resistance, particularly against chlorides and other industrial solvents.
Application
These stainless steel pipes and tubes are used in a variety of applications, including:
- Chemical Processing: Due to their resistance to corrosive chemicals.
- Food and Beverage: For their hygienic properties and ease of cleaning.
- Pharmaceuticals: Where cleanliness and corrosion resistance are critical.
- Oil and Gas: For high-pressure and corrosive environments.
- Marine Applications: Due to their resistance to saltwater corrosion.
Possible Alternative Grades
While BS 3605 grades are highly versatile, there are alternative grades that may be considered depending on specific requirements:
- 304L / 316L: Low carbon versions of 304 and 316, offering improved weldability.
- 321 / 321H: Stabilized grades with titanium, suitable for high-temperature applications.
- 317L: Offers even greater corrosion resistance than 316 due to higher molybdenum 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.
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