Product Description: U8 / U8A / SK85 / SK5 Sheet Steel
U8 and U8A sheet steel (international equivalents SK85 and SK5) are high-carbon tool steels that combine good hardness, wear resistance, and sufficient toughness. This balance of properties makes them a versatile choice for manufacturing tools and components operating under moderate loads.
General Technical Characteristics
U8 / U8A steels are used for producing cutting and measuring tools, as well as parts requiring increased hardness. After heat treatment, the material achieves an optimal balance of strength and wear resistance.
Key properties:
- high hardness
- good wear resistance
- sufficient toughness
- good hardenability
Chemical Composition
The chemical composition ensures reliable performance:
- Carbon (C): 0.75–0.84%
- Manganese (Mn): 0.15–0.40%
- Silicon (Si): 0.15–0.35%
- Sulfur (S) and Phosphorus (P): minimal content
The balanced carbon content provides a combination of hardness and toughness.
Mechanical Properties
After heat treatment, U8 / U8A steel typically demonstrates:
- hardness: up to 58–62 HRC
- good wear resistance
- sufficient strength
- higher toughness compared to U10
Applications
U8 / U8A sheet steel is used for manufacturing:
- cutting tools
- knives and blades
- measuring instruments
- dies and press molds
It is widely applied in tool manufacturing and metalworking industries.
Features
Key advantages include:
- optimal balance of hardness and toughness
- good wear resistance
- versatility of application
- reliable performance in operation
Supply Formats and Standards
The steel is supplied in sheet form:
- hot-rolled sheets
- cold-rolled sheets
- various sizes and thicknesses available
The material complies with GOST 1435-99 and international standard JIS G4401 (SK5, SK85).
U8 / U8A sheet steel is a versatile material suitable for applications requiring a balance of strength, hardness, and wear resistance.
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