I. Differences in Material Properties
(I) Core Relationship Between Hardness and Sharpness

- High-Speed Steel (HSS): Hardness ranges from HRC 60 to 67, with sharpness superior to manganese steel; maintains stable hardness above 600°C, excellent high-temperature adaptability, and cutting speed up to 60 meters per minute.

- Manganese Steel: Hardness ranges from HRC 47 to 55, featuring good toughness but inferior sharpness and sharpness retention, more suitable for impact-resistant scenarios.

(II) Influence of Chemical Composition on Performance

- High-Speed Steel (HSS): Contains various alloying elements (total content 10%-25%), with excellent hot hardness and wear resistance; maintains high hardness at 500°C, suitable for high-speed cutting.

- Manganese Steel: Mainly composed of manganese, low cost, outstanding strength and toughness, but poor corrosion resistance, prone to rusting and requiring regular maintenance.

II. Comparison of Practical Application Performance

(I) Differences in Cutting Performance

- High-Speed Steel (HSS) Tools: Excellent sharpness retention and wear resistance, suitable for precision food processing in professional kitchens and cutting of high-strength materials.

- Manganese Steel Tools: Superior toughness and impact resistance, ideal for heavy-duty kitchen tasks such as chopping bones, mincing meat, as well as outdoor survival and other heavy/impact-related operations.

(II) Segmentation of Applicable Scenarios

- High-Speed Steel (HSS): Core scenarios include precision food processing in professional kitchens, precision mechanical cutting, and high-temperature, high-strength cutting operations.

- Manganese Steel: Core scenarios include heavy kitchen work, outdoor survival tools, and heavy-duty operation equipment.

III. Maintenance and Cost Analysis

(I) Differences in Maintenance Methods

- High-Speed Steel (HSS): Regular grinding at the correct angle; clean with mild detergent after use, rinse thoroughly and dry.

- Manganese Steel: Dry promptly after use, apply anti-rust oil in humid environments; regular grinding to keep the cutting edge flat.

(II) Cost Comparison

- High-Speed Steel (HSS) Tools: High purchase price, wear-resistant and durable, low maintenance requirements, and superior long-term cost performance.

- Manganese Steel Tools: Low purchase price, prone to dullness requiring frequent maintenance, and long-term costs need comprehensive consideration.

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