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M2, SKH51, 1.3343 Tungsten and Molybdenum(Tu+Mo) High Speed Steel for General Purpose- SCALE STEEL.

1/6/2021

 
​W6Mo5Cr4V2 also could be abbreviated as "6542" or "W6", is the representative grade of tungsten and molybdenum high-speed steel. In [SCALE 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[SCALE 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[SCALE 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 [SCALE 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[SCALE 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.

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