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Product Introduction: 310S and 310H Alloys – Exceptional Performance for High-Temperature Applications

The 310S and 310H alloys, recognized under UNS designations S31008 and S31009 respectively, are highly regarded in industries requiring materials capable of withstanding extreme temperatures and corrosive environments. These alloys are particularly suitable for applications in chemical processes, oil and gas industries, and power generation due to their superior mechanical properties and resistance to oxidation.

Physical Properties and Composition

When in the annealed condition and subjected to temperatures ranging from -20°F to +100°F, both 310S and 310H exhibit impressive tensile and yield strengths. The tensile strength for both alloys is approximately 75,000 psi (515 MPa), while the yield strength is around 30,000 psi (205 MPa). The elongation in 2 inches for these alloys is a minimum of 35%, which demonstrates excellent ductility, making them easier to work with during fabrication.

In terms of composition, both alloys contain a balanced mixture of chromium and nickel, essential for their high-temperature performance. The 310S alloy consists of 24.0% to 26.0% chromium and 19.0% to 22.0% nickel, while 310H maintains similar chromium levels but allows for a slightly higher carbon content with a maximum of 0.10%. Such a composition ensures that both alloys have enhanced resistance to oxidation and can perform effectively in elevated temperatures.

Mechanical Properties Overview

The mechanical properties of these alloys are indistinguishable in their core metrics, demonstrating consistent performance standards regardless of application. Both 310S and 310H have a maximum hardness of 90 Rb, a modulus of elasticity of approximately 29.0 x 10^6 psi, and a mean coefficient of thermal expansion measured at 9.2 x 10^-6 in/in/°F. The outstanding thermal conductivity of 116 BTU-in/ft²-h-°F further enhances their suitability in heat exchangers and similar applications, ensuring efficient heat transfer while maintaining structural integrity.

Industry Applications

The versatility of 310S and 310H alloys is evident in a broad array of applications, including high-temperature furnace components, chemical processing equipment, and heat-resistant structures. Their outstanding resistance to oxidation and corrosion at elevated temperatures makes them the top choice for reactors, boilers, and piping systems within power plants and refineries.

Additionally, the use of these alloys in the construction of heat exchangers and industrial ovens highlights their durability and performance under harsh conditions. The ability to withstand thermal cycling without warping or yielding ensures that components made from these materials maintain operational efficiency over time.

Conclusion

In summary, the 310S and 310H alloys stand out in the field of high-performance materials for heat and corrosion resistance. Their robust mechanical properties, superior thermal characteristics, and versatility in application make them a preferred choice for engineers and manufacturers worldwide. As industries continually demand materials that perform under extreme conditions, 310S and 310H alloys will remain integral to innovative solutions across various sectors. For specific applications, consult with material experts to determine the best alloy choice to meet your operational needs.