304 stainless steel thick wall steel pipe introduction:

304 stainless steel thick-walled steel pipes refer to stainless steel pipes with a wall thickness of 10-50.0mm. Those with a thickness of 50mm or more are called extra-thick-walled stainless steel pipes. 304 stainless steel thick-walled steel pipe is a versatile stainless steel material with stronger anti-rust performance than 200 series stainless steel materials. It is also relatively good in terms of high-temperature resistance, and the general operating temperature limit is less than 700°C. 304 stainless steel thick-walled steel pipe has excellent stainless corrosion resistance and good intergranular corrosion resistance. For oxidizing acids, it was found in experiments that in nitric acid with a concentration of ≤65% and below the boiling temperature, 304 stainless steel thick-walled steel pipes have strong corrosion resistance. It also has good corrosion resistance to alkali solutions and most organic and inorganic acids. 304 stainless steel thick-walled steel pipe is a very common stainless steel, also called 18/8 stainless steel in the industry. Its corrosion resistance is better than 430 stainless steel, but the price is cheaper than 316 stainless steel, so it is widely used in daily life, such as some high-end stainless steel tableware, outdoor stainless steel railings, etc. Although this kind of stainless steel is very common in China, the name “304 stainless steel” comes from the United States. Many people think that 304 stainless steel thick-walled steel pipe is a model name in Japan, but strictly speaking, the official name of 304 stainless steel in Japan is “SUS304″.

304 stainless steel thick-walled steel pipe is a versatile stainless steel that is widely used to make equipment and parts that require good comprehensive performance (corrosion resistance and formability). To maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 16% chromium and more than 8% nickel. 304 stainless steel is a brand of stainless steel produced by American ASTM standards. 304 is equivalent to my country’s 0Cr18Ni9 [now changed to 06Cr19Ni10 according to GB/T 20878-2007] stainless steel.

Characteristics of 304 stainless steel thick-walled steel pipe:
304 stainless steel thick-walled steel pipe has good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties. It is resistant to corrosion in the atmosphere. If it is an industrial atmosphere or a heavily polluted area, it needs to be cleaned in time to avoid corrosion. Suitable for food processing, storage, and transportation. Has good processing performance and weldability. Plate heat exchangers, corrugated tubes, household products, building materials, chemicals, food industry, etc. 304 stainless steel is a nationally recognized food-grade stainless steel.

Chemical composition of 304 stainless steel thick-walled steel pipe: 304 chemical composition (%) Carbon C: ≤0.08 Silicon Si: ≤1.00 Chromium Cr: 18.00-20.00 Manganese Mn: ≤2.00 Nickel Ni: 8.00-11.00 Phosphorus P: ≤0.045 Sulfur S: ≤0.030.

Physical properties of 304 stainless steel thick-walled steel pipe: tensile strength σb (MPa) ≥ 520, conditional yield strength σ0.2 (MPa) ≥ 205, elongation δ5 (%) ≥ 40, area shrinkage ψ (%) ≥ 60, Hardness: ≤187HB; ≤90HRB; ≤200HV.