What We Provide
Our main products are round and flat bars for alloy steel, tool steel, stainless steel, spring steel, bearing steel and etc. In those years we offers a wide range of high quality steel for engineering machinery, mold tooling, cutting tools manufacturing industry and etc.
M2 Steel Grade Equivalent Chart
| Country |
USA |
Germany/UK/France |
JAPAN |
ISO |
| Standard |
ASTM A600-92a |
EN ISO 4957-1999 |
JIS G4403-2006 |
ISO 4957-1999 |
| Grades |
M2(Standard C) |
HS 6-5-2 |
SKH51 |
HS 6-5-2 |
| Delivery condition: In annealing (≤255HB), or after heat treatment (62-64HRC). |
Quality control: 100% UT (Ultrasonic Testing), UT Standard is SEP 1921-84 C/c. |
M2 Steel Chemical Composition
| STAND |
C(%) |
Mn(%) |
P(%) |
S(%) |
Si(%) |
Cr(%) |
V(%) |
W(%) |
Mo(%) |
| ASTM A600-92a |
0.78-0.88 |
0.15-0.40 |
Max 0.03 |
Max 0.03 |
0.20-0.45 |
3.75-4.50 |
1.75-2.20 |
5.50-6.75 |
4.50-5.50 |
| EN ISO 4957-1999 |
0.80-0.88 |
≤0.40 |
≤0.030 |
≤0.030 |
≤0.45 |
3.80-4.50 |
1.70-2.10 |
5.90-6.70 |
4.70-5.20 |
| JIS G4403-2006 |
0.80-0.88 |
Max 0.40 |
Max 0.030 |
Max 0.030 |
Max 0.45 |
3.80-4.50 |
1.70-2.10 |
5.90-6.70 |
4.70-5.20 |
| ISO 4957-1999 |
0.80-0.88 |
≤0.40 |
- |
- |
≤0.45 |
3.80-4.50 |
1.70-2.10 |
5.90-6.70 |
4.70-5.20 |
1.3343 Steel Physical Properties
| Physical properties |
Metric |
Imperial |
| Density |
8.16 g/cm³ |
0.294 lb/in³ |
| Melting point |
4680°C |
2600°F |
M2 Steel Mechanical Properties
| Mechanical properties |
Metric |
Imperial |
| Hardness, Rockwell C(tempered at 1150°F, quenched at 2200°F) |
62 |
62 |
| Hardness, Rockwell C(as hardened, quenched at 2200°F) |
65 |
65 |
| Compressive yield strength(when tempered at 300°F) |
3250 MPa |
471000 psi |
| Izod impact unnotched(when tempered at 300°F) |
67 J |
49.4 ft-lb |
| Abrasion(loss in mm3, as-hardened; ASTM G65) |
25.8 |
25.8 |
| Abrasion(loss in mm3, tempered at 1275°F; ASTM G65) |
77.7 |
77.7 |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
M2 Steel Round Bar Sheet Plate Heat Treatment
Machinability
The shaping of M2 tool steels may be executed using grinding strategies. But, which has bad grinding capability. So they’re called as “medium” machinability tool steel under annealed conditions. The machinability of these steels is only 50% of that of the easily machinable W group or water hardening tool steels.
Annealing
Heat to 1600° F, soak thoroughly at heat. Furnace cool 25° F per hour to 900° F, air cool to room temperature. Approximate annealed hardness 241 Maximum Brinell.
Stress Relief of Unhardened Material: Heat slowly to 1200 to 1250° F. Soak for two hours per inch of thickness at heat. Slow cool(furnace cool if possible) to room temperature.
Hardening
Heat M2 steel slowly to 1550° F, soak fully, heat to 1850° F, soak thoroughly. Soak time in the furnace varies from a few minutes to 15 minutes, depending on tool size, the heat capacity of the furnace, and the size of the charge. – Heat to 2150 to 2200° F for max. toughness and minimum distortion. – Heat to 2250 to 2275° F for max.
Tempering
Double tempering is necessary, sometimes preferred three times tempering. Soak for 2 hours per inch of thickness. Air cool to room temperature between tempers. The best tempering range for hardness, strength and toughness is 1000 to 1050° F.
Quenching
For full hardness, need to oil quench to 150-200° F. Air quenches to 150° F. When quenching in hot salt maintains the quench just above the Ms temperature. After equalizing withdraw parts from the hot salt and air cooled to 150° F.
M2 high speed steel is preheated prior to hardening at 2610 ° C(4730 ° F). Then heated rapidly from 2610 ° C (4730 ° F) to 3960 ° C (7160 ° F). The steel is finally cooled for 3 to 5 minutes and quenched in air, salt bath or oil.
Notice
We have our own cutting and processing equipment. Specifications can be cut and customized according to your requirements.
We are a professional special steel stockist and supplier with a high-quality stand for many years. As a professional M2 steel supplier, please contacts us for any request of AISI M2/DIN 1.3343 steels materials. Songshun Steel always with you.
