Core Insights - The 1J22 precision alloy plate has extensive applications in aerospace, medical, and precision machinery, with its physical properties directly affecting processing stability and component lifespan [1] Physical Properties - The density of 1J22 precision alloy plate ranges from 8.7 to 8.95 g/cm³, thermal conductivity is approximately between 70 and 90 W/mK, thermal expansion coefficient is about 16.0 to 17.5×10^-6/K, electrical conductivity is around 60 to 85% IACS, and specific heat capacity is approximately 0.38 to 0.39 J/g·K [3] - The melting point is high, with a working temperature typically covering the range of 20 to 350°C, and it exhibits good dimensional stability after heat treatment [3] - The alloy shows good machinability and weldability, with stable stamping and welding joint performance under conventional manufacturing conditions [3] Standards and Testing - The evaluation of tensile and related parameters for 1J22 precision alloy plate is based on international standards such as ASTM E8/E8M and GB/T 228.1-2010, providing a comparative basis for its mechanical and physical properties [3] Material Selection Misconceptions - There are three key misconceptions in material selection: 1. Relying solely on strength while neglecting thermal behavior, fatigue life, thermal conductivity, and thermal expansion [4] 2. Judging material performance based on a single data source without considering processing consistency and acceptance methods [4] 3. Ignoring supply chain and total cost fluctuations, leading to increased costs in cycles, dimensional tolerances, and subsequent secondary processing due to a blind pursuit of low prices [4] Technical Controversies - The debate regarding heat treatment strategies under high temperature and high load conditions highlights two perspectives: one advocating for solution treatment and aging to enhance fatigue resistance and dimensional stability, while the other supports simplified heat treatment or low-temperature processing to maintain toughness and fracture tolerance [4] Market Dynamics - The use of mixed US and national standards, along with domestic and international market data, aids in understanding cost and supply risks for 1J22 alloy plate [5] - Price fluctuations of raw materials related to 1J22 alloy plate exhibit cyclical behavior, influenced by international market trends reflected in LME data and domestic spot market dynamics [5] Overall Assessment - The physical properties of 1J22 precision alloy plate demonstrate controllability and comprehensive adaptability, with clear technical parameters and testing standards [6] - Avoiding common selection misconceptions and discussing heat treatment strategies for high temperature/high load scenarios are crucial for robust design and procurement decisions [6]