Core Insights - GH4145 nickel-chromium-based superalloy is crucial for high-temperature applications such as aerospace engines and gas turbines due to its strength and adaptability to complex environments [1][4] - Understanding the melting point and related technical parameters is essential for material selection and process design to avoid potential engineering risks [1][4] Melting Point and Technical Parameters - The melting point of GH4145 is approximately 1320°C, as per domestic GB/T 22877-2017 and international ASTM B898-10 standards [4] - The alloy maintains good mechanical properties at high temperatures, providing reliable temperature assurance for high-end applications [4] - Chemical composition includes over 60% nickel and around 20% chromium, with elements like molybdenum, vanadium, aluminum, and titanium enhancing high-temperature performance and oxidation resistance [4] - Density is about 8.1 g/cm³, and the thermal expansion coefficient is within the range of 10^-6/°C, indicating good adaptability to high-temperature stress [4] Common Misconceptions in Material Selection - A prevalent misconception is the sole focus on high melting points, neglecting the balance between mechanical properties and oxidation resistance at elevated temperatures [5] - Relying exclusively on one standard, such as ASTM, while ignoring domestic standards like GB/T can lead to misunderstandings of material performance [5] - Market fluctuations in metal prices, such as those reported by Shanghai Metals Market and LME, directly impact alloy cost control and procurement decisions [5] Performance Evaluation and Industry Standards - There is a debate on whether melting point should be the primary reference for evaluating high-temperature alloys, as creep, oxidation, and mechanical properties are often more critical [5] - Understanding the differences in domestic and international standards, such as GB/T 22877-2017 and ASTM B898-10, is vital for avoiding material selection errors [6] - The focus on comprehensive performance under extreme conditions is emphasized across various standards, including European and Japanese standards [6] - Awareness of real-time metal price changes can aid in developing more flexible procurement strategies to mitigate cost pressures [6] Conclusion - GH4145's melting point and thermal performance parameters provide foundational support for structural components in high-temperature environments [6] - Recognizing industry standards and common misconceptions, along with multi-source data analysis, enhances control over complex working conditions [6]