304 Stainless Steel Pipe
Features: The most commonly used "food-grade" stainless steel (industry terminology: 18/8, containing 18% chromium and 8% nickel). Excellent overall corrosion resistance, processing performance, and weldability; good acid and heat resistance.

201 Stainless Steel Pipe
Features: High manganese content, low nickel content, inexpensive; decent strength, but poor corrosion resistance (especially acid resistance), prone to rusting over time or in humid environments.

Stainless steel pipe is a kind of hollow long circular steel, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial transportation pipes and mechanical structural components.

201 Stainless Steel Coil: An economical material, using manganese instead of nickel. Features: Lowest price, high hardness, but weak corrosion resistance; unsuitable for humid or high-temperature environments. Uses: Decorative parts, shelves, furniture tubing in dry environments; also a raw material for low-end kitchenware.

304 Stainless Steel Coil. General-purpose stainless steel (18% chromium + 8% nickel). Features: Excellent overall performance, resistant to acids, alkalis, and common oxidation. Applications: Food processing equipment, ambient temperature water tanks, chemical containers; it is the most common industrial and civilian coil material.

304L Stainless Steel Coil. A low-carbon version of 304. Features: Due to its lower carbon content, it has better resistance to intergranular corrosion after welding (the weld is less prone to rusting), but its strength is slightly lower than 304. Applications: Thick-walled containers and pipes requiring extensive welding, without the need for post-weld heat treatment.

309S Stainless Steel Coil. A high-chromium, high-nickel heat-resistant stainless steel (approximately 22% chromium + 12% nickel). Features: Excellent resistance to high-temperature oxidation; can be repeatedly heated below 980℃; resistant to sulfide corrosion. Applications: Furnace components (such as annealing furnace liners and radiant tubes), heat treatment tooling, automotive exhaust systems.

304 Stainless Steel Bar
Features: General purpose (18% chromium + 8% nickel), good overall performance, highest cost-effectiveness, excellent machinability and weldability, usually weakly magnetic. Commonly used in food machinery shafts, fasteners, structural parts, and chemical parts.

310 stainless steel bar, also known as 310S stainless steel bar, corresponds to the Chinese grade 0Cr25Ni20. It is a stainless steel material with a high chromium and nickel content.