High Carbon Steel & Stainless Steels for Blades (TE-2, SK4, SK5, RB-S, SUS420J2)
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
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Thickness： 0.010mm-2.0mm Width ： 3.0mm-300mm |
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JAPAN SHANGHAI TAIWAN
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 |
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|
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 |
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|
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.
Due to their workability, hardenability, product performance, affordability, and other characteristics, carbon tool steels are the most widely used cold-rolled special steel strips.
Introducing quenchable martensitic stainless steels, SUS420J2, RB-S, and RB-Z.
We accept requests for consultations, quotes, and other inquiries regarding Tokkin products.
