M42
Qilu
Product Description
SKH59 1.3247 M42 High Speed Steel Round Bar
1: AISI M42 Steel Introduction
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.
M42 steel Stock in warehouse
2: A681 Quality Standard
ASTM-A681-2008 ENG Standard-Specification-for-Tool-Steel-Alloy.pdf
3: AISI 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 |
4: AISI M42 Steel Chemical Composition
| 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 |
5: AISI M42 Steel Mechanical Properties
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.
6: AISI M42 Steel Overviews
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm | |
| Width 20mm-1000mm | ||
| 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 | |
7: AISI M42 Steel Application
M42 are used for cutting tools such as, twist drills, broaches, taps, milling, cutters, saws, reamers etc.
8: AISI M42 Steel Heat Treatment
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.
9: M42 Steel Tolerance
Diameter(mm) | Tolerance | ||
Forged Steel Round Bar | 80-600 | Black Surface:0~+5 | Rough Machined or Turned:0~+3 |
650-1200 | Black Surface:0~+15 | Rough Machined or Turned:0~+3 | |
Hot Rolled Steel Round Bar | 16-310 | Black Surface:0~+1 | Peeled:H11 |
Cold Drawn Steel Round Bar | 6-100 | Black Surface:H11 | Peeled:H11 |
10: Delivery Condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
