High speed tool steel comprises a set of tool steel alloys named for their capacity to cut materials faster than traditional high-carbon steels previously used in cutting tools.
*High alloy content, primarily tungsten or molybdenum, with lesser amounts of chromium, vanadium and cobalt;
*High carbon content-a minimum of 0.65% by weight, but commonly anywhere from 0.8% to 1.5% carbon content;
*Rockwell hardness of at least 64 HRC at room temperature;
*A heat treatment process that produces a high quantity of complex metallic carbides-chiefly tungsten, molybdenum and vanadium carbides-suspended in a steel substrate, which results in hardness and wear resistance.
ASTM | DIN | JIS | C | Si | Mn | P | S | Cr | Mo | V | W | Co |
M2 | 1.3343 | SKH51 | 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 | - |
M35 | 1.3243 | SKH55 | 0.82~0.95 | 0.2~0.45 | 0.15~0.4 | 0.030 Max | 0.030 Max | 3.8~4.5 | 4.75~5.25 | 1.75~2.15 | 5.5~6.5 | 4.6~5 |
M42 | 1.3247 | SKH59 | 1.05~1.15 | 0.15~0.65 | 0.15~0.4 | 0.030 Max | 0.030 Max | 3.5~4.25 | 9~10 | 0.95~1.35 | 1.15~1.85 | 7.75~8.75 |
M50 | 1.3325 | 0.78~0.88 | 0.20~0.60 | 0.15~0.45 | 0.030 max | 0.030 max | 3.75~4.50 | 3.90~4.75 | 0.80~1.25 | - | - | |
T1 | 1.3355 | SKH2 | 0.62~0.8 | 0.2~0.40 | 0.1~0.40 | 0.030 Max | 0.030 Max | 3.75~4.5 | - | 0.9~1.3 | 17.25~18.75 | - |
T15 | 1.3202 | SKH10 | 1.30~1.45 | <0.45 | <0.4 | 0.030 Max | 0.031 Max | 3.8~4.5 | 0.7~1.0 | 3.5~4.0 | 11.5~12.5 | 4.5~5.0 |
T4 | 1.3255 | SKH3 | 0.7~0.8 | 0.1~0.4 | 0.1~0.40 | 0.030 Max | 0.030 Max | 3.75~4.5 | 0.4~1 | 0.8~1.2 | 17.5~19 | 4.25~5.75 |




SICHUAN LIAOFU SPECIAL STEEL COMPANY.,LTD
UNS S31803 and Super Duplex UNS S3276, alloy steel 4130/4140/8620 ,high speed tool T1/M2/M35/M42 and die steel D2/D3/H13/H21/P20,The products covers special steel round, square, flat, wire rod, wire, sheet, pipe, strip and heavy forgings.Produces forged round steel (¢120~850mm) and square steel (120~550mm) of various steel grades. The largest production steel ingot 13T, mainly forged alloy steel. The annual output of forged round can reach 60,000 tons.







We Have State Of The Art Production Lines With Leading Edge Technology For Bearing Steel 100Cr6, Stainless Steel 304 / 316 / Duplex UNS S31803 And Super Duplex UNS S3276, Alloy Steel 4130/4140/8620, High Speed Tool T1/M2/M35/M42 And Die Steel D2/D3/H13/H21/P20. The Products Covers Special Steel Round, Square, Flat, Wire Rod, Wire, Sheet, Pipe, Strip And Heavy Forgings. Produces Forged Round Steel (¢120~850mm) And Square Steel (120~550mm) Of Various Steel Grades.
Alloy Steel | 4140,4142,42CrMo4,1.7225,SCM440,4130,SCM430,25CrMo4,1.7218,34CrNiMo6, 1.6582,4340,SNCM439,36CrNiMo4,1.6511,SACN645,1340,SMn438,SNC236 | |||
Tool Steel | H13,1.2344,SKD61,D2,SKD11,1.2379,1.2510,01,SKS3,95MnWCr5,D3,SKD1,1.2419, SKS31,H21,SKD5,1.2581,P20,35CrMo7,1.2738,1.2316,M2 | |||
Bearing Steel | GCr15,52100,SUJ1,SUJ2,100Cr6,1.2067,55C,8620,4320,9310,440C,M50 | |||
Spring Steel | 9260,SUP6,SUP7,1.7108,54SiCr6,1.7102,5155,SUP9,1.7176,5160,1.7177,6150, SUP10,51CrV4,1.8159 | |||
Stainless Steel | 321,sus321,1.4541,304,SUS304,1.4301,410,SUS410,1.4006,420,1.4021,1.4028, 434,1.4113,316L,SUS316L,1.4435,630,1.4542,431,1.4057 |
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