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High Carbon Steel & Stainless Steels for Blades (TE-2, SK4, SK5, RB-S, SUS420J2)

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Main applications

Razor blades, utility knife blades, scalpel blades, long edged tools, cutting tools, various other edged tools, doctor blades, rulers, soldering irons, scrapers, and spinning machines


Product size range

Thickness: 0.010mm-2.0mm  

Width  : 3.0mm-300mm

 
Manufacturing sites

JAPAN SHANGHAI TAIWAN


  • Product overview Features
  • Standards & Chemical composition
  • Tokkin Advantages
  • Physical Properties Mechanical properties

Product overview

These steels are suited for use in blades such as razors and utility knives, and can acquire high hardness when quenched. Produced using our rolling and heat treatment technologies, by finely controlling carbon grain size, they are materials with excellent hardenability, wear resistance, and sharpenability.

 

Features

Features of each grade are described below.

Category

Grade

Features

Special steel

TE-2

TE-2 is an improved version of SK2 (SK120) grade carbon tool steel. It features increased hardenability due to adjustment of chemical composition and careful management of manufacturing history. Refined carbides provide improved sharpness and wear resistance.

SK4 (SK95)

SK5 (SK85)

SK4 and SK5 are classified as carbon tool steels. They are used in a wide range of fields due to their workability, hardenability, price, and other features.

Stainless steels

RB-S

RB-S is classified as a martensitic stainless steel. It has a higher carbon content than SUS420J2, giving it good quench hardening properties. RB-S provides one of the highest levels of hardness of any stainless steel, and is used for blades and other applications. It is quite hard even with an annealed finish, which makes it unsuitable for complex processing, but ideal for blade applications.

RB-Z

(Under development)

RB-Z is classified as a martensitic stainless steel. It has a higher chrome content than RB-S, and contains added nickel and molybdenum. Due to a somewhat lower carbon content than RB-S, RB-Z is not quite as hard after quenching, but the addition of chromium, nickel, and molybdenum give it excellent corrosion resistance.

SUS420J2

SUS420J2 is classified as a martensitic stainless steel. Thanks to its marketability, price, and other features, it is used in a wide range of fields. When shipped with an annealed finish, it contains completely spheroidized carbides, making it easily processed.

 

Standard

 

TOKKIN

Designation

International

Standard

USA

UK

Germany

France

Russia

China

Europe

Japan

ISO

UNS

AISI

ASTM

BS

DIN

NF

ΓOCT

GB

EN

JIS

Special steel

TE2

--

--

--

--

--

--

--

--

--

SK81M

SK2

TC120

--

W1-11 1/2H

--

--

C120E3U

Y12

T12

--

SK120

SK4

TC90

--

W1-9

--

--

C90E2U

Y10

T10

--

SK95

SK5

TC90

TC80

--

W1-8

--

C80W1

C90E2U

C80E2U

Y8Γ

Y9

T8Mn

T9

--

SK85

Stainless steel

RB-S

--

--

--

--

--

--

--

--

--

--

RB-Z *

--

--

--

--

--

--

--

--

--

--

SUS420J2

5

S42000

S42000

420S45

X30Cr13

Z33C13

30X13

3Cr13

X30Cr13

SUS420J2

 * Materials under development

 

Chemical composition

 

TOKKIN

Designation

Chemical composition(%)

C

Si

Mn

P

S

Cr

Ni

Mo

その他

Special steel

TE2

1.20

~1.30

0.15

~0.35

≦0.35

≦0.030

≦0.020

0.30

~0.50

≦0.25

--

Cu≦0.25

SK2

1.15

~1.25

0.10

~0.35

0.10

~0.50

≦0.030

≦0.030

≦0.30

≦0.25

--

Cu≦0.25

SK4

0.90

~1.00

0.10

~0.35

0.10

~0.50

≦0.030

≦0.030

≦0.30

≦0.25

--

Cu≦0.25

SK5

0.80

~0.90

0.10

~0.35

0.10

~0.50

≦0.030

≦0.030

≦0.30

≦0.25

--

Cu≦0.25

Stainless steel

RB-S

0.58

~0.70

≦1.00

≦1.00

≦0.040

≦0.015

12.50

~14.50

--

--

--

RB-Z

0.33

~0.45

≦1.00

≦1.50

≦0.040

≦0.015

15.50

~17.50

≦1.00

0.80

~1.30

--

SUS420J2

0.26

~0.40

≦1.00

≦1.00

≦0.040

≦0.030

12.00

~14.00

--

--

--

 Excellent hardenability

 By controlling carbide grain diameter, we are able to improve hardenability.

 

 Reduced load on heat treatment furnace

 Material can be quenched at a lower temperature or in a shorter time than normal, making it possible to reduce the load placed on the heat treatment furnace.

 

 Excellent sharpenability

 Our proprietary structure control provides improved sharpenability.

 

 Made-to-order product that can be manufactured in small lots

 We can supply custom-made products top suit your processing conditions.

Other manufacturers typically accept custom-made orders in one-ton lots, but we are able to provide small lots starting from 300 kg.

Physical properties

TOKKIN

Designation

Density

Specific heat

Coefficient of thermal expansion

Thermal conductivity

Electric resistance

Young's modulus

g/cm3

J(kg・K)

(0~100゜C)10-6/K

W/(m・K)

μΩ・cm

N/mm2

SK5(SK85)

7.84

490

11.0

50.2

18

208,000

RB-S

7.7

430

--

25

60

220,000

SUS420J2

7.75

460

10.3

24.7

55

200,000

 

Mechanical properties

Quenching and tempering properties chart.

 

 

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