Alloy Tool Steel

SKS, SKD and SKT Series

Alloy tool steel is a type of steel in which alloy elements such as chromium, molybdenum, tungsten, and vanadium are added to the carbon tool steel to improve hardenability , toughness, wear resistance, and heat resistance .

It is mainly used to manufacture measuring tools, cutting tools, impact-resistant tools, cold and hot molds and some special-purpose tools.

In the carbon tool steel added Si, Mn, Ni, Cr, W, Mo, V , etc. alloying elements in the steel .

Adding Cr and Mn can improve the hardenability of tool steel , and other elements can be selectively added or added at the same time (the total amount is generally not more than 5%) to form a series of alloy tool steel.

 

Product Applications

Alloy tool steel is a special type of tool steel that incorporates alloying elements to enhance hardness, wear resistance, and thermal stability.

Common applications include manufacturing cutting tools, molds, hot working tools, measuring instruments, as well as high-precision bearings and rollers.

Its high performance makes it widely used in industries such as machinery and automotive.

SKD11

SKD11 is a high-quality cold work tool steel known for its e

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SKD11

SKD11 is a high-quality cold work tool steel known for its excellent cutting performance and wear resistance.
It is commonly used in the manufacturing of cold work molds, cutting tools, blades, and modules.
SKD11 is also widely employed in the production of stamping dies, blanking dies, cold forging dies, and shearing dies, which require operation under low-temperature conditions.
Due to its outstanding cutting performance and machinability, SKD11 is also frequently utilized in the production of cold shear cutting tools and cold shear molds.

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SKD61

SKD61 is a type of hot work too

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SKD61

SKD61 is a type of hot work tool steel known for its excellent heat resistance and wear resistance.


It is primarily used in the manufacturing of molds and tools for various high-temperature working conditions, particularly in applications such as plastic injection molds, die-casting molds, and hot work molds.


SKD61 is also widely employed in the production of hot work cutting tools, hot work modules, extrusion molds, and tools and molds for high-temperature processing of aluminum alloys. Due to its outstanding heat resistance and cutting performance, SKD61 is also commonly utilized in the manufacture of hot shear cutting tools and hot shear molds. 

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SKS51

SKS51 is a common high-carbon tool steel widely used in the

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SKS51

SKS51 is a common high-carbon tool steel widely used in the manufacturing of tools and components requiring high strength and wear resistance. Here are several typical applications of SKS51:

Cutting Tools: Due to its excellent hardness and wear resistance, SKS51 is commonly used in the production of various cutting tools such as blades, drills, and milling cutters.

Molding Tools: SKS51 is also extensively used in the manufacturing of molds and stamping tools, including cold punch dies and hot forging dies, which need to maintain shape and function under high stress conditions.

Measuring Instruments: Because of its dimensional stability and wear-resistant properties, SKS51 is suitable for the production of measuring instruments such as calipers and micrometers.

Bearings and Rollers: The high hardness and wear resistance of SKS51 make it an ideal material for manufacturing high-precision bearings and rollers.

Blades: Many industrial and household blades also utilize SKS51 material, including scissors, razors, and kitchen knives.

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S2

S2 is very superior impact-resistance and tool steel, which

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S2

S2 is very superior impact-resistance and tool steel, which has been applied to the fabrication of screw-tap, hex wrench, and pneumatic screw drivers due to its outstanding toughness and general mechanical performances.

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Steel data

Standard Code Spec No. Material No. Mark
JIS G4404 SKS3
CNS 2965 SKS4
JIS G4404 SKS4
CNS 2965 SKS31
JIS G4404 SKS31
CNS 2965 SKS41
JIS G4404 SKS41
ASTM A681 S1
ASTM A681 S2
JIS G4404 SKD4
JIS G4404 SKD5
CNS 2965 SKD11
JIS G4404 SKD61
ASTM A681 H13
DIN 17350 1.2344 X40Cr-Mo5-1
CNS 2965 SKD62
JIS G4404 SKD62
JIS G4404 SKT4
ASTM A681(S-7) S7
AISI S7
(C)% (Si)% (Mn)% (P)% (S)% (Ni)% (Cr)% (Mo)% (Cu)% (W)% (V)% Ni+Cu Annealing(HB) Quenching(HRC)
0.9~1 ≦ 0.35 0.9~1.2 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.5~1 ≦ 0.25 0.5~1 ≦ 217 ≧ 60
0.45~0.85 ≦ 0.35 ≦ 0.5 ≦ 0.03 ≦ 0.03 0.5~1 ≦ 0.25 0.5~1 ≦ 201 ≧ 56
0.45~0.55 ≦ 0.35 ≦ 0.5 ≦ 0.03 ≦ 0.03 0.5~1 ≦ 0.25 0.5~1 ≦ 201 ≧ 56
0.95~1.05 ≦ 0.35 0.9~1.2 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.1 ≦ 0.25 1~1.3 ≦ 217 ≧ 61
0.95~1.05 ≦ 0.35 0.9~1.2 ≦ 0.03 ≦ 0.03 ≦ 0.25 0.9~1.1 ≦ 0.25 1~1.3 ≦ 217 ≧ 61
0.35~0.45 ≦ 0.35 ≦ 0.5 ≦ 0.03 ≦ 0.03 ≦ 0.25 1~1.5 ≦ 0.25 2.5~3.5 0.15~0.3 ≦ 217 ≧ 53
0.35~0.45 ≦ 0.35 ≦ 0.5 ≦ 0.03 ≦ 0.03 ≦ 0.25 1~1.5 ≦ 0.25 2.5~3.5 0.15~0.3 ≦ 217 ≧ 53
0.4~0.55 0.15~1.2 0.4~0.4 ≦ 0.03 ≦ 0.03 1~1.8 ≦ 0.5 1.5~3 0.15~0.3 ≦ 207 ≧ 64
0.4~0.55 0.9~1.2 0.3~0.5 ≦ 0.03 ≦ 0.03 0.3~0.6 ≦ 0.5 ≦ 217 ≧ 58
0.25~0.35 ≦ 0.4 ≦ 0.6 ≦ 0.03 ≦ 0.02 ≦ 0.25 2~3 ≦ 0.25 5~6 0.35~0.5 ≦ 235 ≧ 42
0.25~0.35 0.1~0.4 0.15~0.45 ≦ 0.03 ≦ 0.03 ≦ 0.25 2~3.2 ≦ 0.25 9~10 0.35~0.5 ≦ 241 ≧ 48
1.4~1.6 ≦ 0.4 ≦ 0.6 ≦ 0.03 ≦ 0.03 ≦ 0.5 11~13 0.8~1.2 ≦ 0.25 0.2~0.5 ≦ 255 ≧ 58
0.32~0.42 0.8~1.2 0.2~0.5 ≦ 0.03 ≦ 0.03 ≦ 0.25 4.5~5.5 1.1~1.75 ≦ 0.25 0.8~1.15 ≦ 229 ≧ 50
0.32~0.45 0.8~1.2 0.2~0.5 ≦ 0.03 ≦ 0.03 4.75~5.5 1.1~1.75 0.8~1.2 ≦ 235 ≧ 52
0.37~0.42 0.9~1.2 0.3~0.5 ≦ 0.03 ≦ 0.03 4.8~5.5 1.2~1.5 0.9~1.1 ≦ 235
0.32~0.42 0.8~1.2 0.2~0.5 ≦ 0.03 ≦ 0.02 ≦ 0.25 4.5~5.5 1~1.5 ≦ 0.25 1~1.5 0.2~0.5 ≦ 229 ≧ 48
0.32~0.46 0.8~1.2 ≦ 0.5 ≦ 0.03 ≦ 0.02 ≦ 0.25 4.5~5.5 1~1.5 ≦ 0.25 1~1.5 0.2~0.5 ≦ 229 ≧ 48
0.5~0.6 0.1~0.4 0.6~0.9 ≦ 0.03 ≦ 0.03 1.5~1.8 0.8~1.2 0.2~0.5 ≦ 0.25 ≦ 248 ≧ 42
0.45~0.55 0.2~1 0.2~0.9 ≦ 0.03 ≦ 0.03 3~6.5 1.3~1.8 ≦ 0.35 ≦ 0.75 ≦ 229 ≧ 56
0.45~0.55 0.2~1 0.2~0.9 ≦ 0.03 ≦ 0.03 3~6.5 1.3~1.8 ≦ 0.35 ≦ 0.75 ≦ 229 ≧ 56