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Customized Precision Vacuum Casting Mould Tube for Seamless Aerospace Applications. High-Purity Carbon Steel: Made with low-impurity steel for superior high-temperature resistance and structural stability. Stress-Relief Treatment: Annealing process removes internal stress to prevent deformation under thermal shock. High Reusability: Designed for multiple cycles to reduce vacuum smelting costs and improve yield. Customized Dimensions: Full customization available for size, precision, and design to meet specific needs. ISO Certified Quality: Manufactured under ISO9001:2015 with 100% export-grade quality inspection.