SKD61
Tool Steel
Equivalent Grades: GB 4Cr5MoSiV1, JIS SKD61, ASTM H13, DIN X40CrMoV5-1. SKD61 is the tool steel, mold steel, and middle carbon steel possessing high hardness and wear resistance after heat treatment. It also has the good performance of hardenability and thermal fatigue stability. SKD61 not only supports huge mechanical stress, but also thermal stress during working repeatedly. It is widely used to produce the cutting tools (drilling cutter, circular cutter, scissor, etc.), cold/heat work dies and measuring implements and further to manufacture the pistons, valves, valve seats of fuel pump of diesel engine, and ejector sleeves, punching machine, and other tools which work in high temperature condition.
Chromium hot work tool steels
Purpose
SKD61 is widely used in heat work die steel.
International Comparison of Materials
| EU EN | INTER ISO | USA AISI | JAPAN JIS | GERMANY DIN | CHINA GB | FRANCE AFNOR | ITALY UNI |
|---|---|---|---|---|---|---|---|
| -- | -- | H13 | SKD61 | X40CrMoV51 | 40CrMoV5 | Z40CDV5 | X35CrMoV05KU |
| SPAIN UNE | Sweden SS | Finland SFS | Poland PN | Czechia CSN | Austria ONORM | Russia GOST | England BS |
|---|---|---|---|---|---|---|---|
| X40CrMoV5 | 2242 | -- | -- | -- | -- | 4Ch5NF1S | BH13 |
**This comparison table is for reference only. The standards and grades of various countries have slightly different chemical compositions. Please refer to the database for details.**
Chemical Composition(JIS G4051)
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Ni(%) | Cr(%) | Mo(%) | V(%) | Cu(%) |
|---|---|---|---|---|---|---|---|---|---|
| 0.33-0.42 | 0.8-1.2 | 0.2-0.5 | 0≦0.03 | 0≦0.03 | 0≦0.25 | 4.5-5.5 | 1.0-1.5 | 0.8-1.15 | 0≦0.25 |
Conditions of heat treatment
- Annealing: 820~870℃
- Hardening: 1000~1050℃ Air Cooling
- Tempering: 550~650℃ Air Cooling
- Nitriding: 480~650℃
Criterion for heat treating conditions revise:
- Ac: 970~918℃
- Ar: 765~725℃
- Ms: 280℃
Mechanical properties
Tensile strength (kgf/mm²): ≧980
Yield strength (kgf/mm²): ≧785
Elongation (%): ≧9
Cross section reduction rate (%): ≧45
Impact value (J/cm2): ≧47
Hardness (Hb) : 207
Size Range
| Shape | Size(mm) | ||
|---|---|---|---|
| Round Bar | 8.2, 9.2, 10.2, 11.2, 12.2, 13.2, 14.2, 15.2, 16.2, 17.2, 18.2, 19.2, 20.2, 22.2, 24.2, 25.2, 26.2, 28.2, 30.2, 32.2, 34.2, 36.2, 38.2, 40.2, 42.2, 44.2, 46.2, 48.2, 51, 56, 61, 66, 71, 76, 81, 86, 91, 96, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 201, 211, 221, 231, 241, 251, 261. | ||
- Steel Application
Cutting Tools
There are many types of cutting tools, such as: milling cutters, drills, circular saw blades, reamers, PCD (Polycrystalline Diamond) cutting tools, hole drills, lathe tools, stamping tools, etc. The quality of the cutting tool material will affect the surface quality, cutting efficiency, tool life and other factors. Therefore, the selected tool material should have a high degree of hardness, wear resistance, strength, toughness and heat resistance.The materials for cutting tools application that we recommend are as below.