304 Pipe
Stainless Steel 304 Pipe: Ideal for all structural applications
304 stainless steel pipe is one of the most widely used austenitic stainless steel pipes globally . 304 pipe is the most versatile and widely used of various stainless steel pipes due to its versatility and high-end durability. Its chemical composition, mechanical properties, weldability, and corrosion/oxidation resistance provide the best all-round performance stainless steel at a relatively low cost. The 304 pipe provides protection from corrosion and pitting, which adds longer life to the product.
Main Alloying Elements
Chromium (Cr)
18–20%
Forms passive oxide layer for corrosion resistance.
Nickel (Ni)
8–10.5%
Stabilizes austenitic structure; improves ductility and toughness.
Nitrogen (N)
≤0.10%
Increases strength and stabilizes austenite
Carbon (C)
≤0.08%
Enhances strength but reduces weldability if high.
Manganese (Mn)
≤2.0%
Improves hot workability and replaces some nickel.
Silicon (Si)
≤0.045%
Improves machinability (trace amounts).
Phosphorus (P)
≤0.045%
Trace elements (improve machinability).
Sulfur (S)
≤0.030%
Enhances machinability but may reduce corrosion resistance.
Advantages
- Excellent corrosion resistance in mild environments (better than carbon steel).
- High formability and weldability.
- Cost-effective and widely available.
Standards & Certifications
ASTM A312
(Seamless/welded pipes for high-temp service).
ASTM A269
(Stainless tubing for general corrosion resistance).
Common Applications
- Food & Beverage Industry: Sanitary tubing, storage tanks.
- Architecture: Handrails, decorative structures.
- Automotive: Exhaust systems, trim.
- Household: Kitchen sinks, appliances.
- Chemical containers, including for transport
Types of 304 Stainless Steel Pipes
- Seamless Pipes: Higher pressure resistance, used in critical applications.
- Welded Pipes: More economical, suitable for low/medium-pressure systems.
- Schedule Variants: Sch 10, 40, 80, 160 (thickness varies for pressure requirements).