Tianjin Bohai Metal Corporation

W6Mo5Cr4V2(M2) hot rolled steel round bars

M2 is a molybdenum high-speed steel, which has the advantages of small carbide non-uniformity and high toughness. It is easy to overheat, so the quenching temperature should be strictly controlled, and the protection requirements for heat treatment should be strict

Steel Round Bars

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Commodity name: W6Mo5Cr4V2(M2) hot rolled steel round bars

Product introduction

M2 is molybdenum series high-speed steel, has the advantages of small carbide inhomogeneity and high toughness. Easy to overheating, should strictly control the quenching heating temperature, the more strict protection for heat treatment. Because of its hardness and wearability, used in the manufacture of cutting more difficult to cutting tool materials. M2 high-speed steel with carbide orientation is bigger, so the more strict protection for heat treatment is suitable for the mold vibration and shock loads.

Technical data

Similar Grade

Execution Standard	ZEICIN Grade	GB	AISI	JIS	DIN
GB/T9943-2008	M2	W6Mo5Cr4V2	M2	SKH51	1.3343

Chemical Composition of M2 Tool Steel Material

ASTM A681	C	Si	Mn	P	S	Cr	Mo	V	W
M2/ T11302	0.78～0.88	0.20～0.45	0.15～0.40	0.030 Max	0.030 Max	3.75～4.50	4.50～5.50	1.75～2.20	5.50～6.75
DIN 17350	C	Si	Mn	P	S	Cr	Mo	V	W
1.3343/ S6-5-2	0.86～0.94	≤0.45	≤0.40	0.030 Max	0.030 Max	3.80～4.50	4.70～5.20	1.70～2.00	6.00～6.70
GB/T 9943	C	Si	Mn	P	S	Cr	Mo	V	W
W6Mo5Cr4V2	0.80～0.90	0.20～0.45	0.15～0.40	0.030 Max	0.030 Max	3.80～4.40	4.50～5.50	1.75～2.20	5.50～6.75
JIS G4403	C	Si	Mn	P	S	Cr	Mo	V	W
SKH51/SKH9	0.80～0.88	≤0.45	≤0.40	0.030 Max	0.030 Max	3.80～4.50	4.70～5.20	5.90～6.70	1.70～2.10

SAE M2 Tool Steel Material Mechanical Properties

Hardness, Rockwell C (tempered at 621°C, quenched at 1204°C): 62 HRC.

Hardness, Rockwell C (quenched at 1204°C) ): 65 HRC

Forged of M2 HSS Steel metal material

At first, Pre-Heating to 650-750℃，Then heat to forged temperature. Soak at 1204°C, ensure heat thorough. Then start forged, the forged temperature no low than 950℃. After forging, cool slowly.

Heat Treatment of SAE M2 Steel

M2 HSS Steel Annealing

At first, Slowly heat to 871℃，then slowly Cool to 538℃(1000℉) in heat treatment furnace. Then cool in air. After annealing hardness HBS: 255 Max.

M2 tool Steel Hardening

M2 steel having very high hardenability and should be hardened by cooling in still air. The use of a salt bath or controlled atmosphere furnace is desirable to minimize decarburization, and if not available, pack hardening in spent pitch coke is suggested.