M2 Steel’s Chemical Property :
|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
V |
W |
|
M2 |
0.78-0.88 |
0.20-0.45 |
0.15-0.40 |
≤0.03 |
≤0.03 |
3.75-4.50 |
4.50-5.50 |
1.75-2.20 |
5.50-6.75 |
M2 steel has the characteristics of being suitable for a variety of purposes, excellent machining and excellent comprehensive performance.
M2 Steel Physical Properties :
|
Temperature |
20℃ |
400℃ |
600℃ |
|
Density kg/m³ |
8160 |
8060 |
8000 |
|
Elasticity Modulus KN/m㎡ |
225 |
200 |
180 |
|
Coefficient of thermal expansion Starting at 20℃per ℃ |
- |
12.1x 10-6 1 |
12.6 x 10-6 |
|
Coefficient of heat conduction W/m℃ |
24 |
28 |
27 |
|
Specific heat J/kg ℃ |
420 |
510 |
600 |
Bending strength of M2 steel:
Bending strength is a parameter used to measure the toughness of a material.By the following
The curve shows that different quenching temperatures correspond to different toughness
And hardness.
Round rod 5mm in diameter, hardened and 560O
C, 2 x 1 hr
Bending strength after fire of M2 steel :
Rmb = ultimate bending strength kN/mm2 ± 10%
Reb = bending yield strength kN/mm2 ± 10%
HRC= Hardness value ± 1HRC
Heat treatment of M2 steel:
Softening annealing: annealing temperature 850-900℃, slowly cooling to 700℃ per hour after air cooling, hardness value is lower than
260HB stress relief treatment: treatment temperature 600-700O ℃ heat preservation for about 2 hours, slow cooling to 500O ℃ after air cooling
Hardening treatment: preheating temperature is divided into poles of 450-500℃, 850-900℃.
Austenitizing temperature: 1050-1200℃ quenching to about 550 after air cooling to room temperature recommended 560℃ tempering at least twice (each holding time to
One hour less)
Surface treatment of M2 Steel :
M2 steel can be nitrided (recommended nitrided depth of 2-20 µm) or steam treated.M2 steel is very suitable for physical Vapor deposition (PVD)
And chemical phase deposition (CVD).
Hardening treatment recommendations for M2 steel :
|
Application |
Quenching |
Tempering 2*1hour |
|
Single edge cutting tools, knives tools, forming tools, etc |
1200℃ |
560℃ |
|
Single edge rotary cutting tools, hemp Drill, saw blade, milling cutter, Broach, tap, etc |
1180-1220℃ |
560-590℃ |
|
Cold working steel tools and blanking Cutting,blanking,forming, cooling.Extrusion etc. |
1050-1150℃ |
560-590℃ |
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