SK95M (SK4) - UNS T72301 | High Carbon Tool Steel

SK95M (SK4) - UNS T72301 | High Carbon Tool Steel About

Grade	SK95M (SK4)
Reference Standards (for reference only)	JIS SK95M (G3311)/SK95 (G4802) AISI/SAE W1-9 UNS T72301
Shapes	Coil, Sheet
Thickness	0.10 to 2.0mm (Strip, Sheet)
Width	3.0 to 300mm (Strip, Sheet)
Length	Strip or Sheet (Length less than 2,000mm)
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, Tape Measures, Metal Washers, Spacers
Coil I.D.	300, 400, 500mm
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 micro-ohm meter
Young's Modulus	208 GPa
Thermal Expansion	11.0 x 10-6/K (0-100oC)
Thermal Conductivity	50.2 W/(m K)
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.

SK95M (SK4) Description :

SK95 (former JIS grade symbol: SK4) is a High Carbon steel with a Carbon content of about 0.95%.
Carbon tool steel is the most widely used cold rolled carbon steel because of its good balance of workability, hardenability, product performance, and price. SK95 has a higher Carbon content and higher hardenability than SK85, so it is often used for higher grade applications.
Most SK materials are generally heat treated before or after processing.
Our materials are maintained to have optimum surface roughness after heat treatment, which allows us to achieve an ideal product finish after blackeing.

Applications That Demand Precision

This tool steel is primarily chosen for parts subjected to repetitive stress or wear, including springs, bandsaws, blades, and spacers. These applications benefit from the steel's inherent strength and wear resistance, which extend service life and ensure consistent performance. Industries ranging from manufacturing and construction to specialized equipment trust SK95M (SK4) for mission-critical tasks.

FAQ's of SK95M (SK4) - UNS T72301 | High Carbon Tool Steel:

Q: How is SK95M (SK4) tool steel typically processed for industrial use?

A:SK95M (SK4) is processed through methods such as annealing, skin passing, rolling, and quenching and tempering. These treatments adjust the hardness and ductility to suit various end-use requirements, ensuring the steel meets specific application needs.

Q: What are the common applications of SK95M (SK4) high carbon tool steel?

A:This steel is widely used to manufacture springs, hinges, bandsaw blades, measuring tapes, metal washers, spacers, and specialty blades. Its high hardness and edge retention properties make it suitable for demanding mechanical parts.

Q: When should I choose the annealed versus hard-rolled or Q&T temper for SK95M (SK4)?

A:Annealed SK95M (SK4) is best for forming and machining operations, while hard-rolled and quenched & tempered (Q&T) options are preferred when maximum hardness and strength are required for finished parts.

Q: Where is SK95M (SK4) tool steel commonly supplied from?

A:SK95M (SK4) tool steel is primarily exported, manufactured, and supplied by reputable companies in Japan, recognized for their quality control and advanced steelmaking techniques.

Q: What is the benefit of using SK95M (SK4) steel in springs and blades?

A:The chief advantage is its high wear resistance and ability to retain hardness under stress, resulting in longer component life, reduced maintenance, and reliable performance even in repetitive or heavy-duty applications.

Q: How do I determine the correct width and thickness for my application?

A:Selection depends on design requirements-SK95M (SK4) is available in widths of 3.0-300 mm and thicknesses of 0.10-2.0 mm, allowing customization for both intricate and robust components. Consulting technical drawings or standards ensures optimal choice.