| Quantity: | |
|---|---|
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.15 – 0.21% |
| Manganese (Mn) | 0.50 – 0.90% | |
| Silicon (Si) | ≤0.40% | |
| Chromium (Cr) | 1.50 – 1.80% | |
| Nickel (Ni) | 1.40 – 1.70% | |
| Molybdenum (Mo) | 0.25 – 0.35% | |
| Mechanical Properties | Yield Strength | ≥590 MPa |
| Tensile Strength | ≥780 MPa | |
| Elongation | ≥11% | |
| Heat Treatment | Soft Annealing | 650-700°C, cool slowly in furnace (Max Hardness: 229 HB) |
| Normalizing | 850-880°C, air cooling | |
| Carburising (Hardening) | 880-980°C | |
| Core Hardening | 830-870°C, water quenching | |
| Case Hardening | 780-820°C, water quenching | |
| Tempering Temperature | 150-200°C | |
| Forging | Forging Characteristics | Excellent plasticity, suitable for complex shapes |
| Forging Process Notes | Control temperature and deformation to ensure fine grain size |
Excellent Wear Resistance
The carburized surface layer provides outstanding resistance to abrasion and surface fatigue, making it ideal for high-load and high-speed applications.
High Core Toughness
With a tough and strong core after heat treatment, 18CrNiMo7-6 ensures excellent impact resistance and dynamic load-bearing capacity.
Precise Hardenability
The optimized Cr-Ni-Mo chemical composition allows for deep and uniform case hardening, ensuring consistent mechanical performance across large components.
Good Machinability in Annealed State
Supplied in soft annealed condition (max hardness 229 HB), it offers good machinability for precise part fabrication before heat treatment.
Widely Recognized Standard Material
Conforms to EN 10084 designation 18CrNiMo7-6 (DIN 1.6587), ensuring compatibility with global engineering requirements for gears, shafts, and heavy-duty structural parts.
Heavy‑Duty Gears & Gearboxes
Widely used in manufacturing industrial and wind‑turbine gears where deep case hardness and core toughness ensure reliable wear and fatigue resistance
Shafts & Axles
Ideal for producing high‑stress shafts, crankshafts, and pump shafts that require both high strength and abrasion resistance in dynamic loading environments
Bearings & Wear Components
Commonly used in bushings, wear pins, sprockets, tappets, and other contact‑stress parts due to its wear‑resistant carburized surface and tough core
Heavy Machinery & Automotive Drives
Employed in components of heavy vehicles, mining equipment, and transmissions that demand long service life under fluctuating torque and high loads
Q: What are the main applications of 18CrNiMo7-6 steel?
A: It is widely used for gears, shafts, axles, bearings, and heavy-duty transmission components requiring high wear resistance and toughness.
Q: Does 18CrNiMo7-6 offer good machinability?
A: Yes, it has good machinability in its annealed condition (max hardness 229 HB), making it suitable for precise fabrication before heat treatment.
Q: What is the typical surface hardness after case hardening?
A: After carburizing and quenching, 18CrNiMo7-6 can achieve a surface hardness of 58–63 HRC.
Q: Which standards specify 18CrNiMo7-6?
A: It complies with EN 10084 and DIN 1.6587 standards for case-hardening steels.
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.15 – 0.21% |
| Manganese (Mn) | 0.50 – 0.90% | |
| Silicon (Si) | ≤0.40% | |
| Chromium (Cr) | 1.50 – 1.80% | |
| Nickel (Ni) | 1.40 – 1.70% | |
| Molybdenum (Mo) | 0.25 – 0.35% | |
| Mechanical Properties | Yield Strength | ≥590 MPa |
| Tensile Strength | ≥780 MPa | |
| Elongation | ≥11% | |
| Heat Treatment | Soft Annealing | 650-700°C, cool slowly in furnace (Max Hardness: 229 HB) |
| Normalizing | 850-880°C, air cooling | |
| Carburising (Hardening) | 880-980°C | |
| Core Hardening | 830-870°C, water quenching | |
| Case Hardening | 780-820°C, water quenching | |
| Tempering Temperature | 150-200°C | |
| Forging | Forging Characteristics | Excellent plasticity, suitable for complex shapes |
| Forging Process Notes | Control temperature and deformation to ensure fine grain size |
Excellent Wear Resistance
The carburized surface layer provides outstanding resistance to abrasion and surface fatigue, making it ideal for high-load and high-speed applications.
High Core Toughness
With a tough and strong core after heat treatment, 18CrNiMo7-6 ensures excellent impact resistance and dynamic load-bearing capacity.
Precise Hardenability
The optimized Cr-Ni-Mo chemical composition allows for deep and uniform case hardening, ensuring consistent mechanical performance across large components.
Good Machinability in Annealed State
Supplied in soft annealed condition (max hardness 229 HB), it offers good machinability for precise part fabrication before heat treatment.
Widely Recognized Standard Material
Conforms to EN 10084 designation 18CrNiMo7-6 (DIN 1.6587), ensuring compatibility with global engineering requirements for gears, shafts, and heavy-duty structural parts.
Heavy‑Duty Gears & Gearboxes
Widely used in manufacturing industrial and wind‑turbine gears where deep case hardness and core toughness ensure reliable wear and fatigue resistance
Shafts & Axles
Ideal for producing high‑stress shafts, crankshafts, and pump shafts that require both high strength and abrasion resistance in dynamic loading environments
Bearings & Wear Components
Commonly used in bushings, wear pins, sprockets, tappets, and other contact‑stress parts due to its wear‑resistant carburized surface and tough core
Heavy Machinery & Automotive Drives
Employed in components of heavy vehicles, mining equipment, and transmissions that demand long service life under fluctuating torque and high loads
Q: What are the main applications of 18CrNiMo7-6 steel?
A: It is widely used for gears, shafts, axles, bearings, and heavy-duty transmission components requiring high wear resistance and toughness.
Q: Does 18CrNiMo7-6 offer good machinability?
A: Yes, it has good machinability in its annealed condition (max hardness 229 HB), making it suitable for precise fabrication before heat treatment.
Q: What is the typical surface hardness after case hardening?
A: After carburizing and quenching, 18CrNiMo7-6 can achieve a surface hardness of 58–63 HRC.
Q: Which standards specify 18CrNiMo7-6?
A: It complies with EN 10084 and DIN 1.6587 standards for case-hardening steels.
