| Customization: | Available |
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| After-sales Service: | Quality Assurance |
| Warranty: | Three Years |
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JIS SKH59 | DIN 1.3247/HS2-9-1-8 | ASTM M42 High Speed Steel
M42 Tool Steel is is a molybdenum-series high-speed steel alloy with an additional 8% cobalt. (HSSSteel M42) 8% Cobalt tool bits are designed for machining work hardening alloys and other tough materials. They have increased water resistance and tool life. This improves performance and retention of the cutting edge. M42 steel composition makes for a good combination of toughness and hardness.
2: M42 Steel Equivalent
| Country | USA | German | Japan |
| Standard | ASTM A681 | DIN EN ISO 4957 | JIS G4403 |
| Grade | M42 | 1.3247/HS2-9-1-8 | SKH59 |
| Grade | C | Si | Mn | P | S | Cr | Mo | V | W | Co |
| M42 | 1.05-1.15 | 0.2-0.65 | 0.15-0.4 | 0.03 | 0.03 | 3.5-4.25 | 9.0-10.0 | 0.95-1.35 | 1.15-1.85 | 7.75-8.75 |
| 1.3247 | 1.05-1.15 | 0.7 | 0.15-0.4 | 0.03 | 0.03 | 3.5-4.5 | 9.0-10.0 | 0.9-1.3 | 1.2-1.9 | 7.5-8.5 |
| SKH59 | 1.05-1.15 | 0.7 | 0.4 | 0.03 | 0.03 | 3.5-4.5 | 9.0-10.0 | 0.9-1.3 | 1.2-1.9 | 7.5-8.5 |
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
| Size | Round | Dia 2-200mm |
| Plate/Flat/Block | Thickness 2mm-100mm |
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| Width 10mm-100mm |
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| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
| Application | M42 are used for cutting tools such as, twist drills, broaches, taps, milling, cutters, saws, reamers etc | |
Annealing
AISI M42 high speed steel is heated at 871°C (1599°F) and then cooled slowly in a furnace.
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.
Hardening
AISI M42 high speed steel is preheated to 871°C (1599°F), soaked and finally heated to 1204°C (2199°F).
Tempering
Tempering M42 tool steel at 560°C / 1040°F or higher 3 times for at least 1 hour at full temperature is recommended.
7: Delivery Condition
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For cold drawn plate, usually the delivery condition is cold drawn, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
Hunan Qilu Industrial Co., Ltd has the capacity to forge round steel, steel flat, square steel, module, shaft and roller, etc. The main specifications of the products include Φ80-1000mm forging materials and 80-1200mm square billets and which the maximum piece weight can reach 50T.
The company owns advanced special steel smelting facilities and forging processing equipments, the main steel-making equipment include 2 sets of 50t ultra-high power electric arc furnaces,2 sets of 60t LF refining furnaces,1 set of 60t vacuum degassing refining furnace and 4 sets of 1-20t electroslag re-melting furnaces.
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