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.