Alloy Geek 317 Stainless Steel Standard

Your Analysis Type: X-Ray Fluorescence (XRF)
Pedigree: Certified Reference Material (includes certified chemical analysis)
Sale price$250.00


Alloy Geek 317 Austenitic Stainless Steel Standard

Alloy 317, also known as AISI 317 or UNS S31700, is an austenitic stainless steel alloy with a higher content of molybdenum compared to many other stainless steel grades. This increased molybdenum content provides enhanced resistance to corrosion, particularly in chloride-containing environments. Alloy 317 is often chosen for its improved performance in corrosive and high-temperature applications.

The composition of Alloy 317 typically includes:

  • Chromium (about 18-20%)
  • Nickel (about 11-15%)
  • Molybdenum (about 3-4%)
  • Carbon (about 0.08% max)
  • Manganese (about 2% max)
  • Silicon (about 1% max)
  • Phosphorus (about 0.045% max)
  • Sulfur (about 0.03% max)
  • Iron (balance)

Key features and characteristics of Alloy 317:

  1. Corrosion Resistance: The higher molybdenum content in Alloy 317 contributes to its improved resistance to corrosion, especially in chloride-containing environments. This makes it suitable for applications involving exposure to seawater, brine, and acidic solutions.

  2. High-Temperature Performance: Alloy 317 maintains its mechanical properties and corrosion resistance at elevated temperatures, making it useful in applications involving heat and thermal cycling.

  3. Chloride Stress Corrosion Cracking Resistance: The alloy's composition, including the increased molybdenum content, helps mitigate the risk of chloride stress corrosion cracking, which is common in environments containing chlorides.

  4. Weldability: Alloy 317 is easily weldable using common welding methods.

  5. Applications: It's used in various industries, including chemical processing, pulp and paper, pharmaceuticals, and power generation. Typical applications include heat exchangers, pipelines, and components for corrosive and high-temperature environments.

  6. Forms: Alloy 317 is available in various forms, including sheets, plates, bars, and pipes.

  7. Versatility: Alloy 317 can be used in environments that demand both corrosion resistance and high-temperature performance.

Alloy 317's combination of enhanced corrosion resistance, high-temperature performance, and versatility makes it suitable for industries where exposure to corrosive and high-temperature environments is common. Its ability to resist chloride-related corrosion issues, such as stress corrosion cracking, is particularly valuable in applications involving seawater or chlorinated environments.

Reference Material (RM): A reference material, or RM, is a material with a known composition or property that is used for informational purposes to look at analytical instruments, methods, or procedures. It serves as a point of comparison to ensure the accuracy and reliability of measurements. Reference materials can vary in terms of their level of characterization and traceability. Some reference materials may have well-defined properties, but they might not have undergone the rigorous testing and certification process that certified reference materials (CRMs) undergo. Reference Material chemical compositions are for information purposes.

Certified Reference Material (CRM): A certified reference material, or CRM, is a type of reference material that has been thoroughly analyzed and characterized using multiple validated methods to determine its composition or properties. The results of these analyses are then used to establish certified values, along with associated uncertainties. CRMs are produced and certified by accredited organizations or laboratories following internationally recognized standards, such as ISO Guide 34 (ISO 17034). The certification process includes interlaboratory comparison and statistical analysis to ensure accuracy and traceability.

In summary, the main difference between a reference material and a certified reference material lies in the level of characterization, validation, and certification. CRMs have undergone a more comprehensive and rigorous testing process, resulting in certified values and uncertainties that can be confidently used for instrument calibration, quality control, and research. Reference materials, on the other hand, can provide a point of comparison but do not have the same level of certification and traceability as CRMs. When accuracy and traceability are critical, certified reference materials are preferred.

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