
M2, M35, M42, and T1 High Speed Tool Steels.
| Grade | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Vanadium (V) | Cobalt (Co) |
| M2 | 0.80 - 0.90 | 3.80 - 4.50 | 4.50 - 5.50 | 5.50 - 6.75 | 1.75 - 2.20 | - |
| M35 | 0.88 - 0.96 | 3.80 - 4.50 | 4.50 - 5.50 | 5.90 - 6.70 | 1.75 - 2.20 | 4.50 - 5.20 |
| M42 | 1.05 - 1.15 | 3.50 - 4.25 | 9.00 - 10.00 | 1.15 - 1.85 | 0.95 - 1.35 | 7.75 - 8.75 |
| T1 | 0.65 - 0.75 | 3.75 - 4.50 | 0.30 max | 17.25 - 18.75 | 0.90 - 1.30 | - |
| Grade | Hardness (HRC) | Density (g/cm³) | Red Hardness | Toughness | Wear Resistance |
| M2 | 63 - 65 | 8.16 | Medium | High | High |
| M35 | 64 - 66 | 8.16 | High | Medium - High | High |
| M42 | 67 - 70 | 7.81 | Very High | Fair | Very High |
| T1 | 63 - 65 | 8.67 | High | Medium | High |
| Grade | Annealing Temperature (°C) | Hardening Temperature (°C) | Tempering Temperature (°C) | Quenching Medium |
| M2 | 850 - 900 | 1200 - 1230 | 540 - 560 (Triple) | Oil / Salt Bath / Gas |
| M35 | 850 - 880 | 1200 - 1230 | 540 - 560 (Triple) | Oil / Salt Bath / Gas |
| M42 | 840 - 870 | 1170 - 1200 | 520 - 550 (Triple) | Oil / Salt Bath / Gas |
| T1 | 850 - 880 | 1260 - 1290 | 550 - 570 (Triple) | Oil / Salt Bath / Air |
| Grade | AISI / ASTM | DIN / WNr | EN ISO | JIS | GOST |
| M2 | M2 | 1.3343 / HS6-5-2 | HS6-5-2 | SKH51 | R6M5 |
| M35 | M35 | 1.3243 / HS6-5-2-5 | HS6-5-2-5 | SKH55 | R6M5K5 |
| M42 | M42 | 1.3247 / HS2-9-1-8 | HS2-9-1-8 | SKH59 | R2M9K8 |
| T1 | T1 | 1.3355 / HS18-0-1 | HS18-0-1 | SKH2 | R18 |
M2: General-purpose cutting tools, twist drills, taps, milling cutters, reamers, broaches, and cold-forming tools.
M35: Heavy-duty machining, stainless steel cutting, broaches, end mills, and tools subject to high thermal stress.
M42: High-strength steel machining, aerospace alloys, titanium cutting, high-hardness reamers, and saw blades.
T1: Classic tungsten HSS for turning tools, planers, wood-cutting knives, and high-wear punching dies.
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