M2 High Speed Steel (M2) is a tungsten-molybdenum high speed steel with a well balanced composition suitable for a wide variety of applications. World wide, the M2 type is by far the most popular high speed steel having replaced T1 high speed in most applications because of its superior properties and relative economy.
1.APPLICATIONS: Twist drills, taps, milling cutters, reamers, broaches, saws, and knives.
2.Type: M2
3.M2 tool steel Shape: FLAT,ROUND BAR,SHEET
4.M2 tool steel Delivery condition: Annealed
5.Standard: ASTM600
8.M2 tool steel Materials and Manufacture:ELECTRIC ARC AND VACUUMDEGASSING
9.M2 tool steel Chemical composition :
| C |
Mn |
Si |
Cr |
W |
Mo |
V |
| 0.78-0.88 |
0.15-0.40 |
0.20-0.40 |
3.75-4.5 |
5.5-6.75 |
4.5-5.5 |
1.75-2.2 |
The chemical composition thus deter-mined shall not vary from the limits specied in ASTM61-2008
10.SIZE
| Varieties |
Specifications (mm) |
Condition of delivery |
| steel plate |
(4-80mm) × (200-300mm) × (200-300mm) |
Six grinding surfaces, HRC62-64 |
| Flat steel |
(10-90mm) × (100-600mm) |
Black |
| Round bar |
Diameter 2-200mm |
Black or grinding |
Steelmaking Process: EF, EF/EAF+LF+VD, EF/EAF+ESR
PHYSICAL PROPERTIES
· Density: 0.294 lb/in3 (8138 kg/m3)
· Specific Gravity: 8.14
· Modulus of Elasticity: 30 x 106 psi (207GPa)
· Machinability: 50-60% of a 1% carbon steel
Other informations:
| Product Type |
Standard |
Delivery condition |
Hardness |
| HBW |
HRC |
| Hot rolled round bar/square bar |
GB/T9943
ASTM A600
JIS G4403 |
Annealing |
MAX255 |
MAX269 |
MIN 64 |
| Hot forging round bar/square bar |
| Hot rolled/forging flat bar |
| Cold processed steel bar |
Annealing+ peeled |
| Peeled steel bar |
Annealing +polishing |
| Bright steel |
| Forging temperatur(°C) |
Annealing |
Quenching |
Tempering |
Hardness HRC |
| To heat |
Austenitizing |
Coolant |
Temperature |
Tempering |
| 1120~900cooling slowly |
820~880cooling slowly in the stove |
820~880cooling slowly |
1210-1230 |
A.O.H |
540-590 |
2-3 |
64-56 |
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