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Stainless Steels
Martensitic
Stainless Steels
Quenching and Tempering
RB-S is classified as a martensitic stainless steel, and although it is a stainless steel, can be hardened through quenching and tempering heat treatment.
With a higher Carbon content compared to SUS420J2, great hardening occurs during quenching, it has the highest level of hardness among stainless steels. Because it is quite hard even after annealing, less suitable for complex processing, but it is an ideal material for blades.
This grade is best suited for wear-resistant stainless steel applications, and can be used for heat-resistant applications due to its high tempering resistance.
(2) Less Mechanical and Physical Anisotropy
Due to the effect of microstructural transformation, it has less mechanical and physical anisotropy than austenitic spring materials that are hardened by cold rolling.
(3) Make thickness and width smaller.
Due to being a martensitic stainless steel, it has a higher Young's modulus compared to non-ferrous or austenitic stainless steels for springs. This allows the thickness and width of leaf springs to be reduced.
With a higher Carbon content compared to SUS420J2, great hardening occurs during quenching, it has the highest level of hardness among stainless steels. Because it is quite hard even after annealing, less suitable for complex processing, but it is an ideal material for blades.
Main features of RB-S:
(1) Suitable for Wear and Heat Resistant Applications.This grade is best suited for wear-resistant stainless steel applications, and can be used for heat-resistant applications due to its high tempering resistance.
(2) Less Mechanical and Physical Anisotropy
Due to the effect of microstructural transformation, it has less mechanical and physical anisotropy than austenitic spring materials that are hardened by cold rolling.
(3) Make thickness and width smaller.
Due to being a martensitic stainless steel, it has a higher Young's modulus compared to non-ferrous or austenitic stainless steels for springs. This allows the thickness and width of leaf springs to be reduced.
Stainless Steels
Martensitic
Stainless Steels
Heat Resistance
Quenching and Tempering
SUS420J2 is classified as a martensitic stainless steel, and although it is a stainless steel, can be hardened through quenching and tempering heat treatment. Because of its marketability, price, and usability, it is widely used in various fields.
Our annealed finish makes the carbides completely spheroidized, making processing easier and has excellent hardenability.
This grade is best suited for wear-resistant stainless steel applications, and can be used for heat-resistant applications due to its high tempering resistance.
(2) Less Mechanical and Physical Anisotropy
Due to the effect of microstructural transformation, it has less mechanical and physical anisotropy than austenitic spring materials that are hardened by cold rolling.
(3) It allows for savings in thickness and width.
Due to being a martensitic stainless steel, it has a higher Young's modulus compared to non-ferrous or austenitic stainless steels for springs. This allows the thickness and width of leaf springs to be reduced.
TOKKIN supplies a variety of stainless steels for springs as specified in JIS G4313.
Please refer to this page for the features and comparison of each grade of stainless steel for springs.
Our annealed finish makes the carbides completely spheroidized, making processing easier and has excellent hardenability.
Main features of SUS420J2:
(1) Suitable for Wear and Heat Resistant Applications.This grade is best suited for wear-resistant stainless steel applications, and can be used for heat-resistant applications due to its high tempering resistance.
(2) Less Mechanical and Physical Anisotropy
Due to the effect of microstructural transformation, it has less mechanical and physical anisotropy than austenitic spring materials that are hardened by cold rolling.
(3) It allows for savings in thickness and width.
Due to being a martensitic stainless steel, it has a higher Young's modulus compared to non-ferrous or austenitic stainless steels for springs. This allows the thickness and width of leaf springs to be reduced.
TOKKIN supplies a variety of stainless steels for springs as specified in JIS G4313.
Please refer to this page for the features and comparison of each grade of stainless steel for springs.
Cold Rolled Special Steel Strips
Carbon Tool Steels
Cold Rolled Special Steel Strips
Quenching and Tempering
TE-2 is our original steel grade.
It is an improved grade of alloy tool steel SKS81 with improved hardenability by adjusting the composition and strictly controlling the manufacturing history, and has finer carbides to improved sharpness and wear resistance.
It is used for razor blades and other high grade blades.
It is used for razor blades and other high grade blades.
Cold Rolled Special Steel Strips
Carbon Tool Steels
Cold Rolled Special Steel Strips
Quenching and Tempering
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.
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.
Cold Rolled Special Steel Strips
Carbon Tool Steels
Cold Rolled Special Steel Strips
Quenching and Tempering
SK85 (former JIS grade symbol: SK5) is a High Carbon steel with a Carbon content of about 0.85%.
Carbon tool Steel is the most widely used cold rolled carbonl steel because of its good balance of workability, hardenability, product performance, and price. Among them, SK85 is a grade that has relatively good availability in various dimensions due to its large distribution volume.
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.
Carbon tool Steel is the most widely used cold rolled carbonl steel because of its good balance of workability, hardenability, product performance, and price. Among them, SK85 is a grade that has relatively good availability in various dimensions due to its large distribution volume.
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.
