SK85M (SK5) - UNS T72301 | High Carbon Tool Steel

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MOQ : 100 Kilograms

About SK85M (SK5) - UNS T72301 | High Carbon Tool Steel

Property	Value
Grade	SK85M (SK5)
Reference Standards (for reference only)	JIS SK85M (G3311) / SK85 (G4802) AISI/SAE W1-8 UNS T72301
Available Shapes	Coil, Sheet
Manufacturable Thickness Range (Strip, Sheet)	0.10–2.0 mm
Manufacturable Width Range (Strip, Sheet)	3.0–300 mm
Length	Strip or Sheet (Length less than 2,000 mm)
Technique	Cold Rolled
Temper	Annealed, Skin Passed, As Rolled (Hard), Q&T
Surface Finish	Bright, Dull
Examples of Applications	Springs, Hinges, Bandsaws, Thomson Blades/Pinnacle Blades, Horns, Metal Washers, Spacers
Coil I.D.	300, 400, 526 mm
Chemical Composition	Refer to the image
Mechanical Properties	Refer to the image
Density	7.84 g/cm³
Specific Heat	490 J/(kg·K)
Electrical Resistivity	18 μΩ·cm
Young's Modulus	208 GPa
Thermal Expansion	11.0 × 10^-6/K (0–100°C)
Thermal Conductivity	50.2 W/(m·K)
Melting Range	Refer to specification
Magnetism	Strong
Minimum Order Quantity	100 Kilograms
Country of Origin	Japan, China, Taiwan
Payment Terms	Telegraphic Transfer (T/T)
Delivery Terms	EXW, FOB, CIF, DAP, etc.
Packing	Our Standard Packing for Export
Export Markets	Asia, Middle East, North America, South America, Europe, etc.
Description	SK85M (formerly JIS grade SK5) is a high-carbon tool steel containing approximately 0.85% carbon. It is one of the most commonly used cold-rolled carbon tool steels due to its excellent balance of workability, hardenability, mechanical performance, and cost effectiveness. Compared with lower-carbon carbon steels, SK85M offers higher hardness and wear resistance after heat treatment while maintaining good formability and processability. Because of its large distribution volume, it is readily available in a wide range of dimensions and tempers. Most SK-series steels are heat treated either before or after forming to achieve the required hardness, strength, and wear resistance. SK85M responds well to quenching and tempering, making it suitable for spring components, cutting tools, and precision mechanical parts. TOKKIN maintains optimum surface roughness characteristics that support superior heat-treatment results and allow excellent final appearance after blackening processes. Main Features: Excellent Balance of Performance and Cost Provides an ideal combination of workability, hardenability, durability, and affordability. Good Hardenability Can achieve high hardness and strength through quenching and tempering heat treatment. Widely Available Material Large market distribution allows availability in various dimensions and delivery conditions. Suitable for Heat Treatment Available in Annealed, Skin Passed, Hard Rolled, and Quenched & Tempered (Q&T) conditions. Good Wear Resistance High carbon content provides excellent durability and resistance to wear after hardening. Optimized Surface Quality Controlled surface finish supports superior appearance and performance after heat treatment and blackening. SK85M is commonly used for springs, hinges, bandsaws, Thomson blades, horns, metal washers, spacers, and other industrial components that require a combination of strength, hardness, wear resistance, and economical production.