W6Mo5Cr4V2 also could be abbreviated as "6542" or "W6", is the representative grade of tungsten and molybdenum high-speed steel. In [TJC STEEL]ASTM standard this material is called ‘M2’.

 

Standards:

CHINA	GB/T 9943-2008	W6Mo5Cr4V2 T66541
AMERICA	ASTM A600-2010	M2
JAPAN	JIS G 4403:2006	SKH51
GERMANY	EN ISO 4957:1999	HS6-5-2C，1.3343

 

Chemical Composition(%)

GRADE	T66541	M2	SKH51	1.3343
C	0.80~0.90	0.78~0.88	0.80~0.88	0.86~0.94
Si	0.20~0.45	0.20~0.45[TJC STEEL]	≤0.45	≤0.45
Mn	0.15~0.45	0.15~0.40	≤0.40	≤0.80
P	≤0.030	≤0.030	≤0.030	—
S	≤0.030	≤0.030	≤0.030	—
W	5.50~6.75	5.50~6.75	5.90~6.70	5.90~6.70
Mo	4.50~5.50	4.50~5.50	4.70~5.20	4.70~5.20
Cr	3.80~4.40	3.75~4.50	3.80~4.50	3.80~4.50
V	1.75~2.20	1.75~2.20	1.70~2.10	1.70~2.10

 

Heat Treatment(B/T 9943-2008）

HBW(Annealing)			≤255
	Preheating Tem（℃）		800~900
	Quenched Tem（℃）	Salt Bath Furnace	1200~1220
		Batch-Type Furnace	1210~1230
	Quenched Medium[TJC STEEL]		油或盐浴
	Tempered Tem（℃）		540~560
	HRC		≥64

 

Material Characteristics

6542 steel is characterized by high hardness, wear resistance and thermal hardness (also known as red hardness), when the cutting temperature is as high as 500~600℃, the hardness has not decreased significantly, it can be cut at a higher [TJC STEEL]speed than low alloy steel.The disadvantage is that it is easy to oxidize and decarbonize.

Applications

6542 steel is mainly used to manufacture various cutting tools with high cutting speed, heavy load and high working temperature, such as[TJC STEEL] turning tool, milling cutter, hob, planer tool, broach, drill bit, tap, etc. It can also be used to manufacture cold and hot deformation molds, high temperature springs, high temperature bearings and so on, which require high wear resistance.