It looks like you’re asking about “SUS420 balls for slurry mills”—likely referring to stainless steel (SUS420) grinding balls used in slurry milling or grinding applications. Here’s a breakdown of key details:
1. SUS420 Stainless Steel Properties
– Grade: SUS420 (similar to AISI 420) is a martensitic stainless steel.
– Hardness: Can be hardened to HRC 50-55 (good for wear resistance).
– Corrosion Resistance: Moderate (better than carbon steel but less than 304/316 stainless).
– Applications: Used where hardness and moderate corrosion resistance are needed (e.g., cutlery, valves, and grinding media).
2. Use in Slurry Mills
– Slurry mills grind materials into fine particles suspended in liquid (common in mining, ceramics, or chemical industries).
– Why SUS420 Balls?
– Hardness resists wear from abrasive slurries.
– Better corrosion resistance than carbon steel in wet environments.
– Often chosen for mildly corrosive slurries where higher-grade stainless steels (like 316) are not necessary.
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3. Alternatives to Consider
– Higher-Corrosion Resistance: SUS304/SUS316 if the slurry is highly acidic/alkaline.
– Higher Hardness: Ceramic (alumina, zirconia) or hardened chrome steel balls for extreme abrasion.
4. Key Specifications When Ordering
– Size (e.g., 5mm–50mm diameter).
– Hardness (request HRC values).
– Certifications (e.g., ISO, ASTM).
5. Potential Challenges
– SUS420 may corrode in highly acidic/chloride-rich slurries.
– Over-hardening can make balls brittle; ensure proper heat treatment.
If you need sourcing help or further technical details, clarify your application (slurry type, pH, temperature) for better recommendations. Let me know if you’d like supplier suggestions!