Otai Special steel is a professional supplier in round bar, plate, flat, square SKH59 high speed steel material. High speed SKH59 tool steel is a molybdenum-series high-speed steel alloy. SKH59 steel composition makes for a good combination of toughness and hardness.
High-speed SKH59 tool steel is widely used in metal manufacturing industries and in cutting tools manufacturing because of its superior red-hardness as compared to more conventional high-speed steels, allowing for shorter cycle times in production environments due to higher cutting speeds or from the increase in time between tool changes. SKH59 tool steel is also less prone to chipping when used for interrupted cuts and costs less when compared to the same tool made of carbide.
SKH59 tool steel is a conventionally manufactured cobalt alloyed high-speed steel. The various stages of the manufacturing process are chosen and controlled so that an end product is obtained with a good structure in terms of carbide size and distribution. This is a distinct advantage for the finished tool.
SKH59 high speed steel Material Equivalent and Related Speciations
| USA | German | Japan | China | ISO |
| ASTM A681 | DIN 17350 | JIS G4403 | GB/T 1299 | ISO 4957 |
| M42 | 1.3247 | SKh59 | W2Mo9Cr4VCo8 | HS 2-9-1-8 |
Chemical Composition of SKH59 tool steel Material
| ASTM A681 | C | Si | Mn | P | S | Cr | Mo | V | w | Co |
| M42/ T11342 | 1.05～1.15 | 0.15～0.65 | 0.15～0.40 | 0.030 Max | 0.030 Max | 3.50～4.25 | 9.00～10.00 | 0.95～1.35 | 1.15～1.85 | 7.75～8.75 |
| DIN 17350 | C | Si | Mn | P | S | Cr | Mo | V | w | Co |
| 1.3247/S2-10-1-8 | 1.05～1.15 | ≤0.70 | ≤0.40 | 0.030 Max | 0.030 Max | 3.50～4.50 | 9.00～10.00 | 0.90～1.30 | 1.20～1.90 | 7.50～8.50 |
| GB/T 1299 | C | Si | Mn | P | S | Cr | Mo | V | w | Co |
| W2Mo9Cr4VCo8 | 1.05～1.15 | 0.15～0.65 | 0.15～0.40 | 0.030 Max | 0.030 Max | 3.50～4.25 | 9.00～10.00 | 0.95～1.35 | 1.15～1.85 | 7.75～8.75 |
| JIS G4403 | C | Si | Mn | P | S | Cr | Mo | V | w | Co |
| SKH59 | 1.05～1.15 | ≤0.70 | ≤0.40 | 0.030 Max | 0.030 Max | 3.50～4.50 | 9.00～10.00 | 0.90～1.30 | 1.20～1.90 | 7.50～8.50 |
Form of Supply
For SKH59 high speed steel supply, we can supply the round bar, flat bar, plate and square block. SKH59 Diameters can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.
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- Round
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- sheet
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- Plate
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- Square
Forging of SKH59 tool steel
Pre heat the SKH59 tool steel slowly and uniformly to 650-760°C and equalise. Then increase more quickly to the forging temperature of 1010-1150°C and equalise prior to forging. Do not allow the forging temperature to drop below 980°C, if this occurs re heating will be necessary. Always cool the SKH59 tool steel very slowly after forging.
Heat Treatment of SKH59 tool steel material
1.Annealing
SKH59 tool steel is heated at 871°C (1599°F) and then cooled slowly in a furnace.
2.Stress Relieving
To relieve stresses created by extensive machining or tooling with complex geometries. Heat in a neutral atmosphere for 1 to 2 hours after reaching a temperature of 1110 to 1200°F (600 to 650°C), followed by slow cooling in the furnace.
3.Hardening
SKH59 tool steel is preheated to 871°C (1599°F), soaked and finally heated to 1204°C (2199°F).
4.Tempering
Tempering SKH59 tool steel at 560°C / 1040°F or higher 3 times for at least 1 hour at full temperature is recommended.
Regular size and Tolerance
SKH59 tool steel Round bar: Diameter 2mm-800mm
SKH59 tool steel Plate: thickness 1mm-800mm x 100-810m
High speed steel SKH59 Flat / square bar: Thickness 1mm-200mm x 1mm-200mm
Others have not specified size, pls contact our experienced sales team.
Properties of SKH59 high speed steel
Machanical & Physical Properties of SKH59 molybdenum high speed tool steel
| Density of SKH59 high tool steel HSS | Mechanical Properties of SKH59 steel | ||
| Metric | Imperial | Hardness, Rock C, Oil quenched | 64-66 HRc |
| 7.81 kg/cm3 | 0.282 lb/in3 | Izod impact unnotched,Temper | 13-25 J |
| Machinability (1% carbon steel) | Poisson’s ratio | 0.27-0.30 | |
| 35.0 – 40.0% | Elastic modulus | 190-210 GPa | |
Processing
SKH59 High Speed steel round bar and flat sections can be cut to your required sizes. SKH59 High Speed ground steel bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. SKH59 High Speed steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.
Applications
SKH59 High Speed Steel is used high production machine work and is used for various cutting tool, knife and punch and die applications. Some of these applications include Twist drills, taps, milling cutters, reamers, broaches, saws, cold work steel tools.
Contact
Contact our experienced sales team to help you with your M42 High Speed Steel questions by Email or Telphone.
If you have any M42 Tool steel inquiry and question for Price, Application, hot treatment, Please don’t hesitate contact us.
Email: Jack@otaisteel.com
Tel: +86-769- 23190193
Fax: +86-769-88705839