When it comes to custom wire trays or baskets, there is a wide range of stainless steel (SS) options available. Each type of stainless steel alloy possesses distinct characteristics, such as melting point, tensile strength, and resistance to corrosion or oxidation.
It is important to select the appropriate stainless steel grade based on your specific requirements. Below is an outline of the most commonly used types of stainless steel and their properties.
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Stainless steel alloys can be classified into:
- Austenitic Stainless Steels: High chromium content for corrosion resistance and non-magnetic properties.
- Ferritic Stainless Steels: Lower nickel content for cost-efficiency.
- Martensitic Stainless Steels: High hardness but less corrosion resistance.
- Duplex (Ferritic-Austenitic) Stainless Steels: High tensile strength and corrosion resistance.
- Precipitation-Hardening (PH) Stainless Steels: Strong and corrosion-resistant.
Each category includes various grades with specific attributes. It’s important to choose the right grade based on the requirements of the application. For example, austenitic stainless steels are commonly used in food processing and medical equipment due to their corrosion resistance and hygienic properties. On the other hand, martensitic stainless steels are often used in applications where hardness and wear resistance are crucial, such as in cutting tools and knives.
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Grade 301 stainless steel is ductile, strong, and resistant to corrosion, suitable for drawing, forming, and welding.
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Grade 302 stainless steel offers corrosion resistance and is ideal for applications like springs, food processing, and kitchen equipment.
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This non-magnetic alloy is highly machinable and corrosion-resistant, making it suitable for heavily machined components.
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Grade 304 stainless steel is versatile with high tensile strength and corrosion resistance, perfect for various uses.
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Grade 309 stainless steel provides high tensile strength and resistance to chemicals and high temperatures, commonly used in high-heat environments.
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Grade 316 stainless steel has good chloride resistance, making it suitable for marine applications.
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Grade 317 stainless steel offers high corrosion resistance and strength, ideal for marine and chemical processing sectors.
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Grade 321 stainless steel can withstand high temperatures and chemical corrosion with excellent stress rupture properties.
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Grade 347 stainless steel is durable in high temperatures and suitable for welding applications.
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Grade 405 stainless steel is less corrosion-resistant but suitable for mildly corrosive environments.
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Grade 408 stainless steel is heat-resistant with nickel and chromium content.
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Grade 409 stainless steel offers resistance against atmospheric corrosion and exhaust gas.
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Grade 420 stainless steel is hard, corrosion-resistant, and ductile, commonly used for cutlery.
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Grade 430 stainless steel has good nitric acid resistance but lower strength compared to austenitic alloys.
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Grade 434 stainless steel is strong and resistant to heat, suitable for high-temperature applications.
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Grade 436 stainless steel is resistant to abrasion and magnetic, used in automotive parts.
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Grade 444 stainless steel resists oxidation and pitting with high strength and good ductility.
Additional Information
Grade 410:
Grade 410 stainless steel is also known for its high strength and hardness, making it suitable for applications such as pump shafts and valve parts.
Grade 410S:
In addition to its low carbon content, grade 410S has good weldability and formability, making it a versatile choice for various industries such as automotive and aerospace.
Grade 414:
Grade 414 stainless steel is often used in the construction of pressure vessels and piping systems due to its superior strength and corrosion resistance.
Grade 416:
Aside from its machinability, grade 416 stainless steel also exhibits excellent resistance to acids, making it a popular choice for applications in chemical processing.
Grade 420:
Grade 420 stainless steel is frequently utilized in the manufacturing of surgical instruments and dental equipment due to its exceptional hardness and wear resistance.
Grade 440:
Grade 440 stainless steel is highly corrosion-resistant and is often found in marine environments, as well as in the production of high-quality tools and industrial equipment.
Additional Stainless Steel Grades
Grade 2205
Grade 2205 stainless steel is a duplex stainless steel that offers excellent corrosion resistance and high strength. It is often used in harsh environments where resistance to chloride stress corrosion cracking is essential. Additionally, grade 2205 has good weldability and formability, making it suitable for various applications in the chemical processing, oil and gas, and pulp and paper industries.
Grade 2304
Grade 2304 stainless steel is a duplex stainless steel with a balanced composition of chromium, molybdenum, and nitrogen. This grade exhibits similar corrosion resistance to grade 316, but with higher strength and improved weldability. Grade 2304 is commonly used in structural and architectural applications, as well as in marine environments where resistance to pitting and crevice corrosion is required.
Grade 2507
Grade 2507 stainless steel is a super duplex stainless steel with enhanced pitting and crevice corrosion resistance. It offers high strength and excellent resistance to chloride stress corrosion cracking, making it suitable for demanding applications in the oil and gas, chemical processing, and desalination industries. Grade 2507 is known for its exceptional performance in aggressive environments where conventional stainless steels would fail.
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Grade 17-4 stainless steel provides exceptional strength and corrosion resistance, commonly used in aerospace and chemical sectors.
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This stainless steel grade offers a combination of strength, corrosion resistance, toughness, and hardness, ideal for high-pressure environments.
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Grade 17-4 stainless steel is known for its excellent weldability and formability, making it versatile for various manufacturing processes.
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Due to its high strength-to-weight ratio, grade 17-4 stainless steel is often used in the production of structural components for sports equipment and automotive applications.
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For a detailed breakdown of stainless steel grades and their characteristics, refer to the chart below:
Tensile Strength
Maximum Use Temp
Melting Point
Resistance
Austenitic Alloys
Grade 301 Stainless: Excellent corrosion resistance
Grade 302 Stainless: Excellent corrosion resistance
Grade 303 Stainless Steel: Lower corrosion resistance
Grade 304 Stainless: Good overall resistance to corrosives
Grade 309 Stainless: Excellent corrosion resistance
Grade 316 Stainless: Excellent chloride resistance
Grade 317 Stainless: Good chloride resistance
Grade 321 Stainless: Excellent corrosion resistance
Grade 347 Stainless: Excellent corrosion resistance
Ferritic Alloys
Grade 405 Stainless: Good acid corrosion resistance
Grade 408 Stainless: Resists oxidizing acids and salt spray
Grade 409 Stainless: Good corrosion resistance
Grade 420 Stainless: Fairly corrosion resistant
Grade 430 Stainless: Good nitric acid resistance
Grade 434 Stainless: Superior pitting resistance
Grade 436 Stainless: Excellent citric and nitric acid corrosion resistance
Grade 442 Stainless: Good corrosion resistance
Grade 444 Stainless: Good oxidation resistance
Martensitic Alloy
Grade 410 Stainless: Good corrosion resistance to air, water, and chemicals
Grade 410S Stainless: Good oxidation resistance
Grade 416 Stainless: Poor Chloride resistance. Good resistance to acids, alkalis & fresh water
Grade 420 Stainless: Resistant to mild acids, alkalis, and water when hardened
Grade 440 Stainless: Limited corrosion resistance
Duplex (Ferritic-Austenitic) Alloys
Grade 2205 Stainless: Excellent corrosion resistance
Grade 2304 Stainless: Resistance to corrosion cracking
Understanding the materials in any metal-based project is essential. Various metals come in a range of grades and alloys, each with unique characteristics. Accurately identifying and testing metals is crucial for project success.
It is essential to select the right metal for your project to avoid negative outcomes, especially in structures that bear heavy loads.
Utilizing common methods for identifying and testing metals can be beneficial when working with unfamiliar materials.
- Magnetic Testing: Magnetic testing is commonly used to distinguish between ferrous and non-ferrous metals. Ferrous metals are attracted to magnets, while non-ferrous metals are not.
- Density Testing: Determining the density of a metal can help identify the type of metal present. Density testing involves measuring the weight of a known volume of the metal.
- Acid Test: The acid test involves applying acid to the metal to observe the reaction. Different metals react differently to acids, allowing for identification.
- Hardness Test: Measuring the hardness of a metal can provide insight into its composition. Hardness testing methods include Rockwell hardness testing and Brinell hardness testing.
- Microscopy: Using a microscope to examine the metal’s microstructure can reveal details about its composition, such as grain size and inclusions.
- Flame Testing: Flame testing involves heating the metal and observing the color of the flame. Different metals produce distinct flame colors, aiding in identification.
These common metal testing methods can provide valuable information about the alloy composition of a metal, even without access to advanced tools. By utilizing a combination of these tests, you can make informed decisions regarding metal identification and analysis.
Metal Identification Testing Order
To identify metals instantly, start by determining if the metal is magnetic. Follow the identification process based on the metal’s magnetic properties.
Identification process for NONMAGNETIC metals:
Identification process for MAGNETIC metals:
How do you determine steel grade?
Identifying steel is straightforward, but distinguishing between the 3,500 grades can be challenging without sophisticated equipment. Three basic tests can help narrow down the options.
Note: These tests are more accurate when compared to a known steel grade. Have a sample of known steel nearby for comparison.
Visual Tests
You can visually identify steel by looking for an identification code or observing the color to determine the type of steel present.
Spark Test
A spark test can confirm if the material is steel and aid in identifying the alloys present, especially the carbon content.
Refer to the illustration below for examples of different grades shown during the spark test.
Filing Test
Try filing the steel to determine which alloys may be mixed with it based on the filing rate. Use the Mohs Hardness Scale of Metals to recognize softer metals that file down at varying rates.
Additional methods for determining steel grade include magnetic tests, which can help identify the type of steel based on its magnetic properties, and chemical tests, which involve analyzing the composition of the steel to determine its grade accurately.
Learn more about steel grades
At Mead Metals, we supply steel and other metals of the highest quality. Explore more about steel grades on our blog or utilize our Steel Comparison Guide for identification purposes.
Whether you require materials, information, or services, Mead Metals is prepared to assist you. Get in touch with us today for a prompt quote.