SK5 High Carbon Tool Steel
SK5 High Carbon Tool Steel
SK5 High Carbon Tool Steel
Model
SK5

Item specifics

type
high carbon

Review

Description

Sk5 is a Japanese high carbon steel. It’s used in a wide range of tools (Razor blades, utility knives, scalpel blades, long edged tools, cutting tools) due to its workability, hardenability, price, and other features.

After quenching and tempering, sk5 steel has high hardness and wear resistance. SK5 high carbon steel is used to make various tools which request high hardness and wear resistance, such as the shape of the mold and the simple punch, metal cutting tools, drilling tools, woodworking cutter, countersink drills, axes, chisels, hand saws longitudinal and fitter assembly tools, rivet die and other minor tools. We can supply SK5 steel in hardened & tempered process and annealing process.

USES FOR SK-5 STEEL
Steel may be described as high or medium SK-5 steel. This has to do with its chemical makeup and the forging process. A high carbon steel is approximately 1080 which is a harder, stronger steel while a medium would have a carbon content of approximately 1050 or lower. Usually, the purpose of the steel determines its make up. The harder stronger SK-5 steel may be used in making tactile or hunting knives, while the medium steel is flexible and bends without breaking which is desirable in creating swords used in fencing. SK-5 is rarely used in machetes.
There are several factors that can affect the finished product of steel including environmental conditions, stresses and flaws in the chemicals in the solution, and the forging system. Manufacturers of steel are cognizant of this and usually, the greatest care is taken to ensure, that the steel produced is of the finest quality and will pass the scrutiny of the HRC.

JIS-SK5

C(%)

Si(%)

Mn(%)

P(%)

S(%)

Cr(%)

Ni(%)

Cu(%)

0.8-0.9

0.15-0.35

0.15-0.5

≦0.03

≦0.03

≦0.3

≦0.25

≦0.25

Steel SK5 (JIS )   and its European equivalent C90U (1.1535) ( EN )

EU
EN

USA
-

Germany
DIN,WNr

Japan
JIS

France
AFNOR

Italy
UNI

China
GB

Poland
PN

Czechia
CSN

Austria
ONORM

Russia
GOST

C90U (1.1535)

W110

 

C105W2

 

SK4

SK5

 

C105E2U

 

C100KU

 

T10

 

N10

 

19192

 

K990

 

U10

 

Steel SK5 (JIS )   and its European equivalent C80U (1.1525) ( EN )

EU
EN

Germany
DIN,WNr

Japan
JIS

France
AFNOR

England
BS

Italy
UNI

China
GB

Poland
PN

Czechia
CSN

Austria
ONORM

Russia
GOST

C80U (1.1525)

C80W1

C80W2

 

SK5

SK6

 

Y180

 

BW1A

 

C80KU

 

T8

 

N8

 

19152

 

K980

 

U8

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

--

--

--

Physical properties

TOKKIN

Designation

Density

Specific heat

Coefficient of thermal expansion

Thermal conductivity

Electric resistance

Young's modulus

g/cm3

J(kgK)

(0100C)10-6/K

W/(mK)

μΩcm

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

sk5 steel properties

According to the chemical composition and the HRC of the steel, the AEB L Steel has the following features:

sk5 Edge Retention: SK5 offers impressive edge, being carbon steel with close to 1%, makes it very hard steel with great edge retention.

sk5 Corrosion Resistance: sk5 offers decent corrosion resistance, not a bad one, but it must be taken care of to avoid future rust and corrosion.

sk5 Wear Resistance: Great wear resistance, thanks to the fine grain and Carbon carbides.

sk5 Sharpness: The rule says the harder the steel, the harder to sharpen it, SK5 can get very hard (62-63 HRC), which makes sharpening a bit hard.

sk5 Toughness: Sk5 is very tough steel with great impact resistance, the steel offers a great balance between hardness and toughness at the cost of corrosion resistance (you can’t have those three in one steel).

HOW SK-5 STEEL COMPARES

It is named after a Japanese scale but is similar in properties to the American 1080 steel, which is made up of approximately 0.80% carbon and up to 0.90% manganese. On the HRC scale, it ranks at approximately 65, which makes it a very hard steel. Its alloy increases its strength and abrasion resistance. It is a good, tough blade with a great edge-holding ability.

sk5 steel equivalent

Sk5 is very close to the carbon Steel W2 and 1084. They have a very close chemical composition, they all offer what “Carbon Steel” are good at EDGE RETENTION and TOUGHNESS, and they have decent corrosion resistance, and they fall in the same price range (low/mid-range price).

Yield
Rp0.2 (MPa)

Tensile
Rm (MPa)

Impact
KV/Ku (J)

Elongation
A (%)

Reduction in cross section on fracture
Z (%)

As-Heat-Treated Condition

Brinell hardness (HBW)

497 (≥)

426 (≥)

32

33

34

Solution and Aging, Annealing, Ausaging, Q+T,etc

121

Product size range

Grade

Thickness (mm)

Width (mm)

SK2 (SK120)

0.010–2.000

3–300

SK4 (SK95)

0.010–2.000

3–300

SK5 (SK85)

0.010–3.500

3–300

SK6 (SK75)

0.010–2.000

3–300

SK7 (SK65)

0.010–1.600

3–300

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 *

--

--

--

--

--

--

--

--

--

--

SUS4202

5

S42000

S42000

420S45

X30Cr13

Z33C13

30X13

3Cr13

X30Cr13

SUS420J2