In modern industrial applications, selecting the right stainless steel pipe is critical for ensuring durability, corrosion resistance, and safety. S30408 stainless steel pipe is a widely used material in chemical, food, pharmaceutical, and marine industries due to its superior mechanical properties and excellent corrosion resistance.
This guide will help you understand what S30408 is, its specifications, applications, and why it is a reliable choice for your projects.
What is S30408 stainless steel pipe?
S30408 is the UNS designation for 1.4301/304 stainless steel pipe, commonly used in industrial piping systems. It is an austenitic stainless steel that exhibits excellent corrosion resistance and mechanical properties in various environments. It maintains structural integrity at temperatures up to 870°C (1598°F) and can be easily welded using standard welding techniques, making it suitable for complex piping systems.
What is S30408 equivalent to ASTM material?
30408 is essentially equivalent to ASTM A240/A240M Grade 304 (or AISI 304) austenitic stainless steel. It is the designation for 304 stainless steel in the Chinese standard (GB/T 20878), possessing almost identical chemical composition and mechanical properties, such as excellent corrosion resistance, high strength, and good weldability.
Chemical Composition
| Element | C | Mn | Si | Cr | Ni | P | S | N |
|---|---|---|---|---|---|---|---|---|
| % | ≤0.07 | ≤2.0 | ≤1.0 | 17.0–19.5 | 8.0–10.5 | ≤0.045 | ≤0.03 | ≤0.11 |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 500–700 MPa |
| Yield Strength | 205 MPa |
| Elongation | ≥40% |
| Hardness | 70–95 HRB |
| Density | 7.93 g/cm³ |
| Maximum Service Temperature | 870°C |
Available Sizes
| Outer Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6 mm – 500 mm | 0.5 mm – 25 mm | 6 m / custom |
Corrosion resistance of S30408 stainless steel
S30408 steel is a type of stainless steel which belongs to the 300 series. It has excellent corrosion resistance due to its high chromium content, making it ideal for use in applications such as automotive parts, kitchen sinks and exhaust systems.
Ductility of S30408 material
S30408 (304 stainless steel) exhibits high ductility, with typical elongation rates of 60-70% in the annealed condition before fracturing, allowing it to be easily formed and bent without breaking. This high ductility is a key characteristic of this austenitic stainless steel, making it suitable for applications requiring significant deformation during manufacturing.
What is the density of S30408 stainless steel?
The density of S30408 (Type 304) stainless steel is approximately 7.93 g/cm³ or 7930 kg/m³. This density can also be expressed as approximately 0.286 lb/in³ or 490 lb/ft³.
Applications of S30408 Stainless Steel Pipe
Chemical Industry – Ideal for piping systems handling acids, alkalis, and other corrosive fluids.
Food and Beverage Industry – Suitable for hygienic piping in dairy, brewery, and beverage production.
Pharmaceutical Industry – Complies with sanitary standards for fluid transfer in production lines.
Marine & Offshore – Corrosion-resistant in saltwater environments.
Construction & HVAC – Commonly used for water, gas, and air systems.
If you have project requirements for 304 stainless steel pipes, we welcome your order. GNEE has a large inventory of best-selling products for you to choose from. Available in both seamless and welded forms. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.
Packaging: Packed with waterproof paper and steel strips, meeting standard export sea freight packaging requirements, suitable for various transportation methods, or customized according to customer requirements.
Delivery time: Stock items ship immediately, customized products have a delivery time of 15-30 days.
*Value-added services: Pre-treatment, parts cutting, third-party inspection, sample service, ultrasonic testing, and dimensional inspection.
FAQ
Is S30408 suitable for seawater applications?
Yes, S30408 stainless steel pipes have good corrosion resistance in mild chloride environments, but for highly saline or aggressive marine conditions, S31603 / 316L may be recommended.
Can S30408 pipes be welded?
Absolutely. Standard welding techniques like TIG, MIG, and arc welding can be applied without pre-treatment. Post-weld annealing is optional for critical applications.
What is the difference between S30408 and S30403?
S30403 is a low-carbon variant (similar to 304L), designed to minimize carbide precipitation during welding. S30408 has standard carbon content and is suitable for general piping applications.
Can custom sizes be produced?
Yes, manufacturers like Gnee Stainless Steel provide custom diameters, wall thicknesses, and lengths, along with processing services such as cutting, bending, and polishing.