Toolman Special Steels is proud to produce and offer M35 (1.3243). It is medium alloy high speed steel and has better thermal hardness and wear resistance with better machinability than M2, because cobalt is added to it. . It features a strong cutting edge with good toughness, a deep hardening response, and maintains high hot hardness properties.
Steel Properties
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Good high temperature hardness
-
High wear resistance
-
High cutting ability
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Fine and uniform grain size
-
High resistance of cutting edge and good toughness.
Good machinability
Chemical Composition
| Element | Value |
|---|---|
| C | 0.92 |
| Cr | 4.10 |
| Mo | 5.00 |
| W | 6.00 |
| Co | - |
| V | 4.80 |
Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 268 max (Annealed) |
| Quenching and Tempering Hardness (HRC) | 65 min |
| Tensile Strength (N/mm²) | 980 max |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 8.1 |
Modulus of Elasticity
| Temperature (°C) | kN/mm² |
|---|---|
| 20 | 217 |
Thermal Properties
| Temperature (℃) | Thermal Expansion Coefficient (10^-6/℃) |
|---|---|
| 500 | 12.7 |
| 600 | 13 |
Thermal Conductivity
| Temperature (℃) | Thermal Conductivity (W/m•K) |
|---|---|
| 20 | 19 |
HEAT TREATMENT AND PROCESSES
Heat treatment
| Heat Treatment Process | Temperature (°C) | Details | Resulting Hardness |
|---|---|---|---|
| Soft Annealing | 820-880 | Heat uniformly, hold until soaked, cool slowly in furnace. | Brinell hardness of 230-300 HB |
| Stress Relieving | 650 - 700 | Heat to specified temperature, hold for 1 hour, air cool. Reduces machining stresses to minimize distortion during further heat treatment. | |
| Hardening |
|
Preheat to 450-600, then to 850, and finally to 1050. Harden from 1210-1250 followed by oil, air quenching, or warm bath at 550. | 64-66 HRC after quenching |
| Tempering | 540-570 | Reheat to specified temperature, hold for 1 hour (repeat 3 times). |
| Tempering °C | HRC |
|---|---|
| 200 | 63 |
| 300 | 61 |
| 400 | 62 |
| 500 | 64 |
| 525 | 64.5 |
| 550 | 65 |
| 575 | 64 |
| 600 | 63 |
| 650 | 55 |
| 700 | 46 |
Applications
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Broaches and Reamers
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End Mills Gear Cutting
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Shaving and Shaping Tools
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• Twist Drills and Taps
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Special Cutting Tools
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Blades for Sawing Machines
Profile Cutting Tools
Quality Assurance
Our M35 1.3243 steel undergoes rigorous testing and quality control to meet international standards, ensuring consistent performance and reliability. Certificates and test reports are available upon request. Feel free to reach out to us for more information on our M35 1.3243 steel products or to discuss your specific requirements. We're dedicated to providing top-quality steel solutions that meet your needs and exceed your expectations.
Manufacturing Range
| ROUNDS | SQUARES | ||
|---|---|---|---|
| SIZE (MM) | CONDITION | SIZE (MM) | CONDITION |
| 6.00 - 14.00 | CG | 7.2, 8.8, 10.5, 11 | HRA |
| 15.00 - 50.00 | HRAP | 13.5, 14, 17.5, 21 | HRA |
| 52.00 - 405.00 | FAT | 27, 32, 40 | HRA |
| 52.00 - 305.00 | FA |
Flats
| THICKNESS | WIDTH | CONDITION |
|---|---|---|
| 5.00 - 32.00 | 21.00 - 105.00 | HRA |
| 32.00 - 105.00 | 40.00 - 205.00 | FA |
Frequently Asked Questions
M35 / DIN 1.3243 / AISI M35 is a medium-alloy high speed steel. Toolman describes it as offering good high-temperature hardness, high wear resistance, high cutting ability, good machinability, fine and uniform grain size, and a strong cutting edge with good toughness.
Toolman supplies M35 for broaches, reamers, end mills, gear-cutting tools, shaving and shaping tools, twist drills, taps, special cutting tools, saw-machine blades and profile-cutting tools. This makes the grade relevant to manufacturers producing precision cutting and machining tools.
A maximum annealed hardness of 268 HBW and a minimum quenching-and-tempering hardness of 65 HRC. Our tempering data shows hardness ranging from 63 HRC at 200°C to a peak of 65 HRC at 550°C before decreasing at higher tempering temperatures.
M35 records 63 HRC at 200°C, 61 HRC at 300°C, 62 HRC at 400°C, 64 HRC at 500°C, 64.5 HRC at 525°C and 65 HRC at 550°C. Hardness then decreases to 64 HRC at 575°C, 63 HRC at 600°C, 55 HRC at 650°C and 46 HRC at 700°C.
We supply M35 rounds from 6–14 mm, 15–50 mm and 52–405 mm, depending on condition. Squares include listed HRA dimensions from 7.2 mm to 40 mm and forged-annealed squares from 52–305 mm. Flats extend from 5–105 mm in thickness and 21–205 mm in width, depending on condition.
A density of 8.1 g/cm³, maximum annealed hardness of 268 HBW, minimum quenching-and-tempering hardness of 65 HRC, and maximum tensile strength of 980 N/mm² for M35.
Yes. Our M35 / 1.3243 steel undergoes testing and quality control and certificates and test reports are available upon request. Manufacturers can discuss their specific M35 requirements directly with us when placing an enquiry.
