Description
AISI M35 Tool Steel: Detailed Overview
AISI M35 is a high-speed tool steel known for its exceptional hardness, wear resistance, and ability to retain its cutting edge at elevated temperatures. This alloy is widely used in manufacturing applications where durability and precision are paramount.
Introduction to AISI M35 Tool Steel
AISI M35 is an alloyed high-speed steel that contains molybdenum and cobalt, which enhance its hardness and heat resistance. It is classified as an M-type tool steel, making it suitable for a variety of cutting and shaping applications. M35 is particularly valued in high-performance machining and tooling scenarios due to its ability to withstand significant thermal stress.
Key Features of AISI M35 Tool Steel:
- High Hardness: Achievable hardness levels of up to 67 HRC through appropriate heat treatment.
- Excellent Wear Resistance: Superior resistance to abrasion, making it ideal for cutting tools.
- High Red Hardness: Retains hardness and toughness even at high temperatures.
- Good Toughness: Offers resistance to cracking and deformation under heavy loads.
Applications of AISI M35 Tool Steel
AISI M35 is utilized in a variety of industries where high-performance tools are essential. Common applications include:
- Cutting Tools: Drills, taps, and milling cutters designed for hard materials.
- Tooling: Forming tools, dies, and punches.
- Automotive: Precision components requiring durability and wear resistance.
- Aerospace: High-speed machining tools and components subjected to extreme conditions.
Equivalent Grades of AISI M35 Tool Steel
AISI M35 is recognized under various standards, ensuring compatibility across different regions and industries.
| Standard | Equivalent Grade |
|---|---|
| DIN | 1.3242 |
| EN | M35 |
| JIS | SKH55 |
Chemical Composition of AISI M35 Tool Steel
The chemical composition of AISI M35 is specifically engineered to enhance its hardness and performance. The typical composition is as follows:
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.90 – 1.05 |
| Chromium (Cr) | 4.00 – 4.50 |
| Molybdenum (Mo) | 5.00 – 6.00 |
| Vanadium (V) | 1.50 – 2.00 |
| Cobalt (Co) | 4.00 – 5.00 |
| Manganese (Mn) | 0.30 max |
| Silicon (Si) | 0.30 max |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.03 |
This composition ensures high hardness, wear resistance, and toughness.
Mechanical Properties of AISI M35 Tool Steel
The mechanical properties of AISI M35 are critical for evaluating its performance in demanding applications. The following table summarizes these properties:
| Property | Value (Typical) |
|---|---|
| Tensile Strength (MPa) | 2400 – 2500 |
| Yield Strength (MPa) | 1700 – 1900 |
| Elongation (%) | ≥ 5 |
| Impact Toughness (J) | ≥ 20 (at room temp) |
| Hardness (HRC) | 64 – 67 |
These values indicate the steel’s capability to withstand high stresses and impacts.
Heat Treatment of AISI M35 Tool Steel
Heat treatment processes are essential for achieving the desired mechanical properties in AISI M35. Common processes include:
- Hardening: Heat to 1200°F (650°C) and quench in oil or air.
- Tempering: Heat to 400°F (204°C) to improve toughness after hardening.
- Annealing: Heat to 1650°F (900°C) and slow cool to refine the grain structure.
These treatments help tailor the steel’s properties for specific applications.
Hardness of AISI M35 Tool Steel
The hardness of AISI M35 can be adjusted through heat treatment processes. Typical hardness values are:
- Annealed Condition: 200 – 250 HB
- After Hardening and Tempering: Up to 67 HRC
These hardness values reflect the steel’s capability to resist wear and deformation under load.
Physical Properties of AISI M35 Tool Steel
The physical properties of AISI M35 contribute to its performance and reliability. The following table summarizes these properties:
| Property | Value |
|---|---|
| Density (g/cm³) | 8.00 |
| Melting Point (°C) | 1400 – 1450 |
| Thermal Conductivity (W/m·K) | 30 – 35 |
| Specific Heat Capacity (J/kg·K) | 460 – 480 |
These properties ensure stability and performance in various operating conditions.
Machinability of AISI M35 Tool Steel
AISI M35 tool steel exhibits moderate machinability. It can be machined into complex shapes, but high-speed cutting tools are recommended due to its hardness. Care should be taken to manage tool wear during machining operations.
Welding of AISI M35 Tool Steel
Welding AISI M35 is generally not recommended due to the risk of cracking. If welding is necessary, preheating to about 300°F (150°C) is advised to minimize the risk of defects. Post-weld heat treatment may also be necessary to relieve stresses.
Supply Cities:
Mumbai Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Visakhapatnam, Kochi, Kerala, Hubli-Dharwad, Karnataka, Ghaziabad Kolkata.
