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Stainless Steel

Stainless steel is a group of iron alloys containing at least 11% chromium, an element that inhibits iron from rusting and also provides heat resistance to steel.

111,667 Views 2024-08-20 16:40:47

Stainless Steel Overview

Stainless steel is a group of iron alloys containing at least 11% chromium, an element that inhibits iron from rusting and also provides heat resistance to steel.

Different types of stainless steel include carbon (from 0.03% to greater than 1.00%), nitrogen, aluminum, silicon, sulfur, titanium, nickel, copper, selenium, niobium, and molybdenum.

Specific types of stainless steel are often referred to by their AISI three-digit number, such as 304 stainless steel.

304L Stainless Steel Casting

304L Stainless Steel Casting

Stainless steel can be rolled into sheets, plates, bars, wires, and tubes.

Stainless steel is an ideal material for many applications because it has the strength of steel and the corrosion resistance of chromium.

It is used in many applications such as cookware, cutlery, surgical instruments (medical bone plates), major appliances, vehicles, construction materials in large buildings, industry, and storage tanks and tank trucks for chemicals and food.

Stainless Steel Classification

Stainless steel is generally classified into four different groups:

Austenitic Stainless Steel

Austenitic Stainless Steel: This is the most common type of stainless steel.

Austenitic stainless steel has higher levels of chromium, molybdenum, and nickel than other types of stainless steel.

It is highly adaptable and known for its excellent strength and ductility.

Ferritic Stainless Steel

Ferritic Stainless Steel: This steel contains between 10.5% and 30% chromium.

Ferritic stainless steels typically have low carbon contents of no more than 0.1%.

Ferritic stainless steels are magnetic and are primarily preferred for their resistance to temperature, corrosion, and stress-deterioration cracking.

Duplex Stainless Steel

Duplex Stainless Steel: This steel combines austenite and ferrite to create a metal that is stronger than either alone.

This combination gives the steel greater strength, which can result in significant weight savings.

Its corrosion resistance makes it ideal for use in marine applications.

Martensitic Stainless Steel

Martensitic Stainless Steel: This steel is similar in structure to ferritic stainless steel, but has a higher carbon content (up to 1.2%), which allows the steel to be hardened to a great extent.

This steel is particularly suitable for making medical tools and surgical instruments.

Stainless steel chemical composition table

AISI ASTM EN DIN C % Max Mn % Max Si % Max S % Max P % Max Cr % Max Ni % Max Mo % Max Others %
201 0.15 5.5-7.5 1.00 0.030 0.06 16-18 3.5-5.5 N 0.25 max
202 0.15 7.5-10 1.00 0.030 0.060 17.00-19.00 4.00-6.00
302 1.4310 0.15 2.00 1.00 0.030 0.045 17.00-19.00 8.00-10.00
302HQ 1.4567 0.03 2.00 1.00 0.030 0.045 17.00-19.00 9.00-10.00 Cu : 3.00-4.00
303 1.4305 0.15 2.00 1.00 0.15 Min 0.20 17.00-1900 8.00-10.00 Cu : 1% max
303EHS 0.15 2.00 1.00 0.30-0.33 0.20 17.00-19.00 8.00-10.00 Cu : 1% max
304 1.4301 0.08 2.00 1.00 0.030 0.045 18.00-20.00 8.00-11.00
304HC 0.05 2.00 1.00 0.030 0.045 18.00-20.00 8.50-9.50 Cu : 2.00-2.50
304L 1.4306 0.03 2.00 1.00 0.030 0.045 18.00-20.00 8.00-12.00
308LER 1.4331 0.02 1.5-2.0 0.50 0.020 0.025 19.00-21.00 9.50-11.00
309LER 1.4332 0.03 1.5-2.0 0.50 0.015 0.020 23.00-25.00 12.00-14.00
310 1.4841 0.25 2.00 1.50 0.030 0.045 24.00-26.00 19.00-22.00
310 1.4841 0.25 2.00 1.50 0.030 0.045 24.00-26.00 19.00-22.00
310S 1.4842 0.08 2.00 1.50 0.030 0.045 24.00-26.00 19.00-22.00
316 1.4401 0.08 2.00 1.00 0.030 0.045 16.00-18.00 10.00-14.00 2.00-3.00
316L 1.4404 0.03 2.00 1.00 0.030 0.045 16.00-18.00 10.00-14.00 2.00-3.00
316LER 1.4430 0.02 1.5-2.0 0.50 0.020 0.020 18.00-20..00 12.00-14.00 2.00-2.75
316Ti 0.08 2.00 1.00 0.030 0.045 16.00-18.00 10.00-14.00 2.00-3.00 Ti : Min (5xC%)
317LN 1.4438 0.03 2.00 1.00 0.030 0.045 18.00-20.00 11.00-15.00 3.00-4.00 N : 0.10-0.22
321 1.4541 0.08 2.00 1.00 0.030 0.045 17.00-19.00 9.00-12.00 Ti : Min (5xC%)
410 1.4006 0.15 1.00 1.00 0.030 0.040 11.50-13.50
416 1.4005 0.15 1.25 1.00 0.15 Min 0.060 12.00-14.00
416XM 0.15 1.25 1.00 030-0.33 0.060 12.00-14.00
420 1.4021 0.15 Min 1.00 1.00 0.030 0.040 12.00-14.00
430 1.4016 0.12 1.00 1.00 0.030 0.040 16.00-18.00
430L 0.03 1.00 1.00 0.030 0.040 16.00-18.00
430F 1.4104 0.12 1.25 1.00 0.15 Min 0.060 16.00-18.00
431 1.4057 0.20 1.00 1.00 0.030 0.040 15.00-17.00 1.25-2.50

Properties and characteristics of stainless steel

Stainless steel is a widely used metal alloy that offers a variety of valuable properties and characteristics.

Here are some of the key properties and characteristics of stainless steel:

  • Corrosion Resistance: Stainless steel is highly resistant to corrosion, thanks to the presence of chromium in the alloy. The chromium forms a thin, invisible layer of chromium oxide on the surface, which protects the underlying metal from oxidation and corrosion.
  • Durability and Strength: Stainless steel is a durable and strong material, making it suitable for a wide range of applications. It has a high tensile strength and can withstand significant stress and impact without deformation or damage.
  • Aesthetic Appeal: Stainless steel has a clean, modern, and attractive appearance, with a shiny, lustrous finish. This makes it a popular choice for various applications, such as kitchen appliances, architectural elements, and decorative items.
  • Easy to Clean and Maintain: Stainless steel is easy to clean and maintain, as it is non-porous and resistant to staining and discoloration. It can be easily wiped down and cleaned with mild detergents or specialized cleaners.
  • Hygienic and Sanitary: Stainless steel is a hygienic and sanitary material, making it suitable for use in food processing, medical, and other sensitive environments. It does not harbor bacteria or microorganisms and is easy to sterilize.
  • Heat and Temperature Resistance: Stainless steel has excellent heat and temperature resistance, allowing it to withstand high temperatures without losing its structural integrity or appearance.
  • Recyclable and Environmentally Friendly: Stainless steel is 100% recyclable and can be melted down and reused without losing its properties. This makes it an environmentally friendly material.
  • Magnetic Properties: Depending on the specific alloy composition, some stainless steel grades can be slightly magnetic, while others are non-magnetic.
  • Customizability: Stainless steel can be easily fabricated, welded, and machined, allowing for a high degree of customization and versatility in its applications.

These properties and characteristics make stainless steel a popular choice in various industries, including food processing, chemical processing, construction, medical equipment, transportation, and more.

Application of stainless steel

Stainless steel is widely used in many industries due to its excellent corrosion resistance, beautiful appearance, good mechanical properties and long service life.

Here are some of the main application areas:

Stainless steel for construction

Stainless steel for construction

Construction industry:

  • Building exterior and interior decoration materials.
  • Door and window frames, railings, handrails, etc.
  • Roofing materials, curtain wall systems.

Kitchen and catering equipment:

  • Tableware (such as knives, forks, and spoons).
  • Kitchen utensils (such as pots and pans).
  • Food service equipment (such as refrigerators, ovens, steamers, etc.).
Stainless steel for household use

Stainless steel for household use

Medical equipment:

  • Surgical instruments, operating tables.
  • Medical instruments and laboratory equipment.
  • Implants (such as orthopedic implants).

Automobile manufacturing:

  • Exhaust system components.
  • Decorative parts and body panels.
  • Engine parts.
Engine parts

Engine parts

Aerospace industry:

  • Aircraft engine components.
  • Structural parts in high temperature areas.
  • Exterior covering of spacecraft.

Chemical and petroleum industry:

  • Reactors, storage tanks.
  • Pipeline systems, valves.
  • Filters, heat exchangers.

Household appliances:

  • Refrigerator, washing machine, air conditioner, etc. shell.
  • Microwave oven liner.
  • Small kitchen appliances.

Piping systems:

  • Water supply and drainage pipes.
  • Industrial fluid delivery pipes.
  • Pipes in desalination equipment.
Piping systems used stainless steel

Piping systems used stainless steel

Marine engineering:

  • Ship structures.
  • Platform structures.
  • Anchor chains and cables.

Railway vehicles:

  • Train car interior and exterior shells.
  • Door and window frames.
  • Seats and other interior parts.

These are just some examples of stainless steel applications.

Due to its unique properties, stainless steel plays an important role in almost all modern industries.

Deze Stainless Steel Casting

Deze Casting & Machining is experienced in stainless steel investment casting, and its casting products can be used in a variety of applications, including valve components, pump components, medical device components, food machinery parts, automotive manufacturing parts, etc.

As a well-known stainless steel casting manufacturer in China, our company accepts customized stainless steel castings of different alloys.

In addition, we can provide additional CNC machining and surface treatment services according to customer needs.

If you have any needs, please contact:

Whatsapp: +8615333853330

Email: sales@casting-china.org

Web: https://dz-machining.com/

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