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High Speed Steel Round Bar and Plate
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 |
| AISI | DIN | JIS | Stock | Application |
Hot Work Tool Steel | H11 | 1.2343 | SKD6 | √ | Die Casting Dies,Extrusion Dies, Hammer Dies, |
H13 | 1.2344 | SKD61 | √ | ||
H10 | 1.2365 | SKD7 |
| ||
-- | 1.2367 | -- |
| ||
L6 | 1.2714 / 1.2713 | SKT4 | √ | ||
H12 | 1.2606 | SKD62 |
| ||
H21 | 1.2581 | SKD5 | √ | ||
Cold Work Tool Steel | D3 | 1.2080 | SKD1 | √ | Cutting Tools, Punching Tools, Shear Bladers, Reamers, Thread Rolling Dies, Calipers, Sockets etc. |
-- | 1.2601 | ~SKD11 | √ | ||
D2 | 1.2379 | ~SKD11 | √ | ||
-- | 1.2379 MOD | DC53 (Daido) | √ | ||
D6 | 1.2436 | -- |
| ||
O1 | 1.2510 | SKS3 | √ | ||
O2 | 1.2842 | -- |
| ||
A2 | 1.2363 | SKD12 |
| ||
S1 | 1.2550 | -- |
| ||
S7 | 1.2357 | -- |
| ||
-- | 1.2767 | SKT6 |
| ||
L2 | 1.2210 | -- |
| ||
Plastic | P20 | 1.2311 | -- | √ | Mold Base, Core & Cavity, Bumper Mold etc. |
P20+Ni | 1.2738 | -- | √ | ||
P20+S | 1.2312 | -- | √ | ||
-- | 1.2316 | -- |
| ||
420 | 1.2083 | SUS420J2 | √ | ||
-- | -- | NAK80 (Daido) | √ | ||
Alloy Steel | 4120 | 25CrMo4 / 1.7218 | SCM420 |
| Shafts, Gears, Drillers, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Crankshafts, Connecting Rods, Came, Couplings etc. |
4135 | 34CrMo4 / 1.7220 | SCM435 |
| ||
4130 | 34CrMo4 / 1.7220 | SCM430 | √ | ||
4140 | 42CrMo4 / 42CrMoS4 / 1.7225 | SCM440 | √ | ||
4142 | 41CrMo4 / 1.7223 | SCM440 |
| ||
4145H | -- | -- |
| ||
4330V | -- | -- |
| ||
4340 | 34CrNiMo6 / 1.6582 | SNCM439 |
| ||
5115 | 16MnCr5 / 16MnCrS5 / 1.7131 |
|
| ||
5120 | 20MnCr5 / 20MnCrS5 / 1.7147 | SMnC420H |
| ||
5140 | 41Cr4 / 41CrS4 / 1.7035 | SCr440 | √ | ||
8620 | 21NiCrMo2 / 1.6523 | SNCM220 |
| ||
8640 | 40NiCrMo2-2 / 1.6546 | SNCM240 |
| ||
-- | 18CrNiMo7-6 / 17CrNiMo6 / 1.6587 | -- |
| ||
9840 | 36CrNiMo4 / 1.6511 | -- |
| ||
E71400 | 41CrAlMo7-10 / 1.8509 | SACM1 |
| ||
-- | 34CrAlNi7 / 1.8550 | -- |
| ||
Bearing Steel | E52100 | 100Cr6 / 1.3505 | SUJ2 | √ | Bearing, Shafts |
-- | 100CrMn6 / 1.3520 | -- |
| ||
-- | 100CrMo7-3 / 1.3536 | -- |
| ||
Spring Steel | 5155 | 55Cr3 / 1.7176 | SUP9 |
| Springs |
6150 | 51CrV4 / 1.8159 | SUP10 |
| ||
9261 | 60CrSi7 / 1.7108 | -- |
| ||
Carbon Steel | 1010 | CK10 / C10E / 1.1121 | S10C |
| Shafts, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Came, Couplings etc. |
1020 | C22 / 1.0402 | S20C | √ | ||
1040 | CK40 / C40E / 1.1186 | S40C | √ | ||
1045 | CK45 / C45E / 1.1191 | S45C | √ | ||
1050 | CK50 / C50E / 1.1206 | S50C | √ | ||
1055 | CK55 / C55E / 1.1203 | S55C |
| ||
1064 | CK60 / C60E / 1.1221 | S58C |
| ||
High Speed Tool Steel | M2 | 1.3343 | SKH51 | √ | Reamer, |
M7 | 1.3348 | -- |
| ||
M42 | 1.3247 | SKH59 | √ | ||
M35 | 1.3243 | SKH55 | √ | ||
T1 | 1.3355 | SKH2 |
| ||
T15 | 1.3202 | -- |
| ||
T42 | 1.3207 | SKH57 |
