SUS 303 HOT Stainless Steel is a martensitic stainless steel known for its excellent machinability and good corrosion resistance, particularly suited for applications requiring precise machining.

Key Characteristics of SUS 303 HOT Stainless Steel:

- Chemical Composition:
- Chromium (Cr): Approximately 17-19%, providing corrosion resistance.
- Nickel (Ni): Around 8-10%, enhancing mechanical properties and heat resistance.
- Manganese (Mn): About 2%, supporting machinability.
- Sulfur (S): Approximately 0.15-0.35%, improving machinability by producing chip-breaking agents.
- Carbon (C): Up to 0.06%, maintaining high strength without compromising corrosion resistance.

- Physical Properties:
- Corrosion Resistance: SUS 303 HOT offers good corrosion resistance in environments free from strong acids and oxidative conditions.
- Machinability: With a higher sulfur content, this steel is more machinable than other stainless steels, reducing machining time and cost.
- Hardness and Strength: Provides reasonable hardness and strength for applications requiring load-bearing capabilities.

- Applications:
- Machinery Manufacturing: Used in machinery components needing precise machining and wear resistance.
- Electrical Equipment: Applied in parts of electrical devices requiring good corrosion resistance.
- Food Industry: Suitable for food processing equipment due to its corrosion resistance and ease of cleaning.
- Medical Field: Used in medical instruments requiring durability and corrosion resistance.

Manufacturing and Processing:
- Production Process: SUS 303 HOT is typically produced through casting, forging, and heat treatment processes to achieve optimal mechanical properties and corrosion resistance.
- Fabrication: It can be machined using methods such as turning, milling, and drilling, maintaining high precision and surface quality.
(Source: Internet)