There are many skilled marketing personnel and a skilled processing service team in our company. Sales network and service network about steel automotive metal products all over the world. Enjoy our warmly customers with Stainless Steel 400 series products and fast and convenient processing services at any time.
400 series stainless steel FAQ
What are the composition and characteristics of 400 series stainless steel?
Commonly used 400 series stainless steel varieties are 430, 410, 420, 409L, etc., of which 430 stainless steel is used the most. The chromium content of 430 stainless steel is 18%, which is characterized by low price, small thermal expansion coefficient, and better chloride stress corrosion resistance than 300 series stainless steel varieties: but its shortcomings are relatively obvious: formability, weldability and tensile strength are less than 300 series stainless steel models, so limited its scope of use. The chromium content of 410 and 420 stainless steel is 13%, and their main feature is high hardness.
Under the same chromium content, the corrosion resistance of 400 series stainless steel is the same as that of 300 series stainless steel and better than that of 200 series stainless steel in oxidizing media such as atmosphere, fresh water and nitric acid. Adding trace elements such as copper, copper and aluminum can improve its deep drawing performance, weldability, corrosion resistance and high temperature resistance strength, and can partially replace 300 series stainless steel.
At present, 400 series stainless steel is widely used in automobile exhaust pipes, elevators, washing machine inner cylinders, kitchen utensils, home appliances, medical equipment, water heaters, roof panels, curtain walls and power plant equipment and other industries.
What types of 400 series stainless steel are there?
There are five main types of stainless steel: austenitic, ferritic, martensitic, duplex, and precipitation hardening. Each type has different characteristics that make it ideal for certain applications.
Austenitic stainless steel is the most widely used type of stainless steel. They have a high chromium content and low carbon content, making them highly resistant to corrosion. They are also non-magnetic and cannot be hardened by heat treatment.
Ferritic stainless steels have lower chromium content than austenitic stainless steels, but still have good corrosion resistance. They can be hardened by cold working, but not by heat treatment.
Martensitic stainless steels have a higher carbon content than austenitic and ferritic stainless steels. They can be hardened by heat treatment and are commonly used in blades and surgical instruments.
The microstructure of duplex stainless steels contains both austenite and ferrite phases. They have excellent corrosion resistance and mechanical properties.
Precipitation hardening stainless steels are a subset of martensitic stainless steels. They are strengthened by precipitation hardening, which involves adding elements such as copper or aluminum to the alloy and then heat treating it to promote the formation of intermetallic phases.
What are the properties of 400 series stainless steel?
400 Series Stainless Steel: This group of alloys includes 410, 416, and 420 steels, which are corrosion resistant and heat treatable. They contain 10.5% to 27% chromium, and small amounts of carbon (0.08% in 410, 0.20% in 416), manganese (1.0%), silicon (0.6%) and other trace elements such as sulfur. They have good oxidation resistance at high temperatures due to their high chromium content. Their mechanical properties are also very different from the 300-series steels; they are generally softer and not as strong at high temperatures as their austenitic cousins. The martensitic grades (410, 420) can be hardened by heat treatment; however, due to their lower chromium content, they are not as corrosion resistant as austenitic stainless steels.
What are the physical properties of 400 series stainless steel?
The 400 series stainless steels are characterized at normal processing temperatures by a single-phase ferritic microstructure in which scattered Ti and Nb carboamides are deposited. The proportion of its chemical composition is very careful, avoiding the annealing temperature or in the heat-affected zone of welding
Austenite and subsequently martensite are formed. Many ferrites have been exposed to temperatures of 700-1100°F (370-590°C) for a long time
Will embrittle after range. This embrittlement is most rapid at a temperature of about 885°F (475°C), often referred to as “885°F
(475°C) embrittlement”. This is caused by the deposition of a Cr-rich second phase called α’ martensite. At 885°C (475°C)The rate of embrittlement depends strongly on the Cr content of the alloy. With less than 12% Cr, embrittlement at 885°F (475°C) is rare.
What is the stress fracture of 400 series stainless steel?
The 409 and 439 alloys have similar fracture data at 1200°F (649°C), while the 439 alloy is slightly longer resistant to fracture under specific stress. However, due to its higher Cr content, Alloy 439 has a longer resistance to fracture at stresses of 1500 psi (10.3 MPa) or less at 1500°F (816°C).
What are the applications of 400 series stainless steel?
The 400 series stainless steels are characterized by high chromium and manganese contents. They are easy to weld and form, making them ideal for a wide range of applications.
Some common applications for 400 series stainless steel include automotive exhaust systems, kitchen appliances, and sinks. This type of stainless steel is also frequently used in architectural applications such as trim and escutcheons.
What is the welding of 400 series stainless steel？
The 400 series stainless steels include martensitic and precipitation hardening types that are magnetic in the annealed condition. They can be heat treated to obtain a wide range of strength and hardness values. Martensitic grades contain 11% to 18% chromium and up to 1.2% carbon, while precipitation hardening grades contain 13% to 30% chromium and up to 3% copper. 400 series alloys can be welded by all standard welding processes, although their high carbon content makes them susceptible to cracking during cooling of the weld zone.
What are the benefits of choosing 400 series stainless steel?
Overall, 400 series stainless steel is an excellent choice for a variety of applications requiring strength, durability, and corrosion resistance. Its many features make it an excellent choice for everything from kitchen appliances to industrial components. Plus, its affordability makes it an excellent choice for anyone looking to save money without sacrificing quality. If you are in the market for stainless steel products or components, we strongly recommend that you consider 400 series stainless steel as your material of choice.