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ASTM M50

2018-04-27 19:42:29
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Steel Grade: ASTM M50| UNS: T11350| Type: —

CHEMICAL COMPOSITION(AISI S1): 
C(%) :         0.78~0.88
Si(%) :         0.20~0.60
Mn(%) :        0.15~0.45
P(%)≤ :        0.03
S(%)≤② :        0.03
Cr(%) :         3.75~4.50
Mo(%) :         3.90~4.75
V(%) :         0.80~1.25
W(%) :        —
Co(%):         —
HARDNESS AND HEAT TREATMENT (ASTM M50):
Hardness HBS|Annealing:        248
Hardness HBS|Cold Drawing:        262
Hardness HBS|Annealing after Cold Drawing:        255
Preheating Temperature/℃:        732~843
Quenching/℃|Salt-Bath Furnace:        1104
Quenching/℃|Controlled Atmosphere Furnace:        1116
Tempering/℃:        538
Hardness≥HRC|After Tempering:        61
Remark(ASTM M50): 
①, ω(Cu+Ni)≤0.75%
②, The composition of S can be increased to ω(S)0.06%~0.15% in order to improve the performance of cutting.
③, The standard is ASTM A600-1999.
Please find the PDF for ASTM M50  
Introduction High Speed Tool Steel (ASTM M50)
High speed tool steel is mainly used in manufacturing high efficient cutting tool.Due to its high red hardness, good abrasion resistance, high strength characteristics, and also used in the manufacture of high performance requirements of the mould, and hot spring roll, high temperature bearing, etc.The use of high speed tool steel after heat treatment the hardness can reach more than HRC63, under the working temperature of 600 ℃ can still maintain a high hardness, but its toughness, wear resistance and heat resistance are good.Annealing state of high speed tool steel main alloy elements tungsten, molybdenum, chromium, vanadium, and some joined the cobalt in high speed tool steel, aluminum and other elements.


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