stainless steel 300 series products

Stainless steel 300 series are classified as the chromium nickel austenitic stainless steel. There are more than ten stainless steel 300 series grade products as below.

stainless steel 301

good ductility, used for molding products. It can also be hardened rapidly by machining. Good weldability. The wear resistance and fatigue strength are better than 304 stainless steel.

stainless steel 302

the corrosion resistance is the same as that of 304. Because the carbon content is relatively high, the strength is better.

stainless steel 303

it is easier to cut than 304 by adding a small amount of sulfur and phosphorus.
stainless steel 304: general model; 18 / 8 stainless steel. Products such as: corrosion resistant containers, tableware, furniture, railings, medical equipment. The standard ingredient is 18% chromium plus 8% nickel. It is a non-magnetic stainless steel that cannot be changed by heat treatment. The GB brand is 06cr19ni10.

stainless steel 304 L

it has the same characteristics as 304, but it is low carbon, so it is more corrosion-resistant and easy to heat treatment, but its mechanical property is poor. It is suitable for products that are welded and difficult to heat treatment.

stainless steel 304 n

with the same characteristics as 304, it is a stainless steel containing nitrogen. Nitrogen is added to improve the strength of the steel.

stainless steel 309

better temperature resistance than 304, up to 980 ℃.

stainless steel 309 s

with a large amount of chromium and nickel, it has good heat resistance and oxidation resistance. Products such as heat exchanger, boiler components and jet engine.

stainless steel 310

excellent high-temperature oxidation resistance, with a maximum service temperature of 1200 ℃.

stainless steel 316

the second most widely used steel after 304, which is mainly used in food industry, watch accessories, pharmaceutical industry and surgical equipment. Molybdenum is added to obtain a special corrosion-resistant structure. Because it has better chloride corrosion resistance than 304, it is also used as “marine steel”. SS316 is usually used in nuclear fuel recovery units. Grade 18 / 10 stainless steel usually meets this application grade.

stainless steel 316 L

low carbon, so it is more corrosion-resistant and easy to heat treatment. Products such as chemical processing equipment, nuclear power generator and refrigerant storage tank.

stainless steel 321

other properties are similar to 304 except that the risk of weld corrosion is reduced due to the addition of titanium.

stainless steel 347

add stabilizing element niobium, which is suitable for welding aviation appliance parts and chemical equipment.

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300 Series Stainless Steel FAQS

What is 300 Series Stainless Steel?

Stainless steel is an alloy made of iron and at least 10.5% chromium. This chromium content gives the alloy excellent corrosion resistance and other useful properties, making it an important material in engineering and construction projects. Among these stainless steel alloys, 300 series stainless steels are popular choices due to their unique properties. In this blog post, we discuss the properties that make 300 series stainless steels so desirable in many applications, such as their strength, ductility, formability, and cost-effectiveness. We will also look at some of the generic grades available and how they are used in different industries.

What are the commonly used grades of 300 series stainless steel?

  1. 304 stainless steel. It is one of the most widely used austenitic stainless steels. It is suitable for the manufacture of deep-drawn parts and acid pipelines, containers, structural parts, and various instrument bodies. It can also be used to manufacture non-magnetic, low-temperature equipment and part
  2. 304L stainless steel. In order to solve the serious intergranular corrosion tendency of 304 stainless steel under some conditions due to the precipitation of Cr23C6, the ultra-low carbon austenitic stainless steel is developed, and its resistance to intergranular corrosion in the sensitized state is significantly better than that of 304 stainless steel. Except for slightly lower strength, other properties are the same as 321 stainless steel. It is mainly used for corrosion-resistant equipment and parts that cannot be solid solution treated after welding. It can be used to manufacture various instrument bodies, etc.
  3. 304H stainless steel. The internal branch of 304 stainless steel, the carbon mass fraction is 0.04%-0.10%, and the high temperature performance is better than 304 stainless steel
  4. 316 stainless steel. On the basis of 10Cr18Ni12 steel, the steel has good resistance to reducing medium and pitting corrosion. In seawater and various other media, the corrosion resistance is better than 304 stainless steel, and it is mainly used for pitting corrosion resistant materials.
  5. 316L stainless steel. Ultra-low carbon steel, with good resistance to intergranular corrosion in sensitized state, suitable for manufacturing welded parts and equipment with thick section size, such as corrosion-resistant materials in petrochemical equipment
  6. 316H stainless steel. The internal branch of 316 stainless steel, the carbon mass fraction is 0.04%-0.10%, and the high temperature performance is better than 316 stainless steel
  7. 317 stainless steel. Pitting corrosion resistance and creep resistance are better than 316L stainless steel, used in the manufacture of petrochemical and organic acid corrosion-resistant equipment
  8. 321 stainless steel. Bowl-stabilized austenitic stainless steel can be replaced by ultra-low carbon austenitic stainless steel by adding bowl to improve intergranular corrosion resistance and have good high-temperature mechanical properties. Except for special occasions such as high temperature or hydrogen corrosion resistance, it is not recommended for general use.
  9. 347 stainless steel. Stabilized austenitic stainless steel, added to improve intergranular corrosion resistance, corrosion resistance in acid, alkali, salt and other corrosive media is the same as 321 stainless steel, good welding performance, can be used as corrosion-resistant materials and heat-resistant steel It is mainly used in thermal power and petrochemical fields such as making containers, pipes, heat exchangers, shafts, furnace tubes in industrial furnaces, and furnace tube thermometers.

What is the surface process of 300 series stainless steel?

  1. CHARACTERISTICS—Silver White Matte: Hot rolled to specified thickness, on a rough, matte surface annealed and dephosphorized.
  2. Features—silver white: pickling after cold rolling, and sometimes a matte surface treatment of a final light cold rolling on the silver surface roll.
  3. Features—brighter luster: after mild cold rolling, it is polished again.

What are the Different Types of 300 Series Stainless Steel?

There are four different types of 300 series stainless steels: austenitic, ferritic, martensitic, and precipitation hardening.

Austenitic stainless steel is the most widely used type of stainless steel. They contain chromium, nickel and manganese and are non-magnetic. Austenitic steels cannot be hardened by heat treatment.

Ferritic stainless steels are magnetic and have a lower carbon content than austenitic steels. They are used in applications where corrosion resistance is important but mechanical properties are not.

Martensitic stainless steels can be hardened by heat treatment and can be magnetic or non-magnetic. They contain chromium, carbon, and sometimes other alloying elements such as molybdenum or vanadium.

Precipitation hardening (PH) stainless steels are a subgroup of the martensitic group. They can be hardened by heat treatment and are magnetic. PH steels contain additional alloying elements such as copper or aluminum.

What are the properties of 300 series stainless steel?

300 series stainless steel is the most widely used type of stainless steel. They are also known as 18/8 stainless steels because they contain 18% chromium and 8% nickel. 300 series stainless steels have good corrosion resistance and are generally non-magnetic.

300 series stainless steel is the most widely used type of stainless steel. They are also known as 18/8 stainless steels because they contain 18% chromium and 8% nickel. 300 series stainless steels have good corrosion resistance and are generally non-magnetic.

The 300 series austenitic stainless steels (SS) feature the addition of chromium (Cr) and nickel (Ni) to the iron, providing excellent corrosion resistance in many corrosive environments. The presence of Cr increases oxidation resistance and scale formation at high temperatures, while Ni increases oxidation resistance against oxidizing and reducing acids. In general, these alloys have excellent toughness, ductility, formability, weldability, and corrosion resistance. Their microstructure usually consists of a face-centered cubic (FCC) austenite phase with small amounts of ferrite or martensite.

What are the benefits of using 300 series stainless steel?

300 series stainless steel is one of the most popular types of stainless steel in the world. It has many advantages over other types of stainless steel, including:

  1. Improved durability: 300 series stainless steel is more resistant to wear than other types of stainless steel. This makes it ideal for applications requiring high durability, such as medical or food processing equipment.
  2. Improved corrosion resistance: Compared with other types of stainless steel, 300 series stainless steel also has better corrosion resistance. This makes it ideal for applications where corrosive conditions exist, such as in marine environments.
  3. Enhanced weldability: 300 series stainless steel is easier to weld than other types of stainless steel and is an excellent choice for manufacturing equipment and structures.
  1. Excellent formability: 300 series stainless steel can be easily formed into various shapes and sizes, making it ideal for a wide range of applications.
  2. Excellent toughness: 300 series stainless steel has excellent toughness, making it resistant to fracture and impact damage. This makes it ideal for critical load bearing applications.