What are the commonly used stainless steel materials for precision castings?
2025-04-02
Precision stainless steel castings are metal parts made of stainless steel through precision processes such as investment casting (lost wax method), which have the characteristics of high dimensional accuracy, adaptability to complex structures and excellent surface quality. Its core processes include mold making, wax mold forming, multi-layer shell preparation, melting and pouring, and post-processing, which can achieve near-net shape and reduce processing allowances.
Commonly used stainless steel materials for precision castings
1. Austenitic stainless steel
Typical grades: 304 (06Cr19Ni10), 316 (06Cr17Ni12Mo2), 316L (022Cr17Ni12Mo2)
Features: Excellent corrosion resistance (especially the 316 series containing molybdenum has strong resistance to chloride ion corrosion), non-magnetic, high machinability, suitable for complex thin-walled castings3.
Application scenarios: Chemical equipment, medical equipment, food processing equipment.
2. Duplex stainless steel
Typical grades: 2205 (022Cr23Ni5Mo3N), 2507 (022Cr25Ni7Mo4N)
Features: Combining the advantages of austenite and ferrite, high strength, resistance to stress corrosion cracking, suitable for high temperature and high pressure environment.
Application scenarios: Oil and gas pipelines, marine engineering components.
3. Precipitation hardening stainless steel
Typical grade: 17-4PH (04Cr17Ni4Cu4Nb)
Characteristics: High hardness and strength obtained through heat treatment, good dimensional stability, suitable for precision instruments and aerospace components.
4. Martensitic stainless steel
Typical grade: 410 (12Cr13), 420 (20Cr13)
Characteristics: High hardness and wear resistance, but weak corrosion resistance, requiring surface treatment.
Application scenarios: Wear-resistant parts such as tools, bearings, valves, etc.
