| Quantity: | |
|---|---|
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.42% – 0.50% |
| Manganese (Mn) | 0.50% – 0.80% | |
| Silicon (Si) | ≤0.40% | |
| Phosphorus & Sulfur (P, S) | Strictly controlled for purity and performance | |
| Nitrogen (N) | Increased via nitriding to enhance hardness and wear resistance | |
| Mechanical Properties | Tensile Strength (σb) | 580 MPa – 1050 MPa |
| Yield Strength (σs) | ≥430 MPa – ≥565 MPa | |
| Elongation (δ%) | ≥16% to ≥8%, depending on thickness | |
| Hardness | Higher in tempered and cold-drawn conditions | |
| Impact Energy (KV2 J) | ≥25 J (tempered and peeled condition) | |
| Heat Treatment | Normalizing Temperature | 840°C – 900°C (air cooling) |
| Annealing Temperature | 680°C – 710°C (furnace cooling) | |
| Stress Relief Temperature | 550°C – 650°C (air cooling) | |
| Oil Quenching Temperature | 840°C – 870°C | |
| Water Quenching Temperature | 820°C – 850°C | |
| Tempering Temperature | 540°C – 680°C (air cooling) | |
| Induction/Flame Hardening | 870°C – 900°C | |
| Forging | Forging Temperature Range | 1100°C – 1200°C |
| Minimum Forging Temperature | Avoid forging below 850°C | |
| Cooling Method | Slow cooling in air or sand to reduce thermal stress and deformation |
Duplex Treatment: Quenched, Tempered & Nitrided
C45R+N combines quenching & tempering (“R”) with nitriding (“N”), delivering a dual-phase treatment that significantly enhances both core strength and surface durability.
Superior Surface Hardness and Abrasion Resistance
The nitrided layer produces a hard compound and diffusion case—achieving up to ~1,000 HV—greatly reducing wear on critical components like gears, shafts, and bearings.
High Fatigue Strength and Crack Resistance
The combined R+N treatment yields substantial improvements in fatigue life—commonly 40–100% over untreated C45—due to high residual compressive stresses in the outer layer.
Minimal Distortion and Precise Dimensional Control
Nitriding proceeds at lower temperatures (~500–600 °C), minimizing thermal distortion and preserving dimensional accuracy, even for tight-tolerance components.
Balanced Mechanical Strength & Toughness
Core tensile strength (580–1050 MPa) and yield strength (≥430–565 MPa), combined with ≥25 J impact energy, ensure robust mechanical performance under dynamic loads.
Gears, Shafts & Bearings
Perfect for high-load rotating components requiring durable surface performance—nitrided surfaces enhance wear resistance and suppress scoring in gears, shafts, and bearings.
Mold Tools & Dies
Ideal for tools and dies used in forging, extrusion, and molding tasks. The nitrided layer delivers superior abrasion resistance and extended service life under cyclic stress.
Automotive & Machinery Components
Widely used for high-stress parts such as crankshafts, transmission shafts, and connection rods—where fatigue strength and surface hardness are essential.
Precision Engineering & General Mechanical Parts
Suited for components like axles, spindles, studs, and guides in general engineering contexts, offering a robust balance of core toughness and wear resistance.
A: C45R+N is an enhanced version of medium carbon steel C45. "R" indicates the steel is quenched and tempered, while "N" means it has undergone nitriding for improved hardness and wear resistance.
A: It offers superior surface hardness, enhanced fatigue strength, excellent wear resistance, minimal distortion after treatment, and a strong balance of core toughness and machinability.
A: It’s widely used in automotive, machinery, mold manufacturing, and general engineering for components like gears, shafts, bearings, and tools under heavy load.
A: Yes. C45R+N is a performance upgrade over C45, ideal for applications requiring higher surface durability, wear resistance, and fatigue life.
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.42% – 0.50% |
| Manganese (Mn) | 0.50% – 0.80% | |
| Silicon (Si) | ≤0.40% | |
| Phosphorus & Sulfur (P, S) | Strictly controlled for purity and performance | |
| Nitrogen (N) | Increased via nitriding to enhance hardness and wear resistance | |
| Mechanical Properties | Tensile Strength (σb) | 580 MPa – 1050 MPa |
| Yield Strength (σs) | ≥430 MPa – ≥565 MPa | |
| Elongation (δ%) | ≥16% to ≥8%, depending on thickness | |
| Hardness | Higher in tempered and cold-drawn conditions | |
| Impact Energy (KV2 J) | ≥25 J (tempered and peeled condition) | |
| Heat Treatment | Normalizing Temperature | 840°C – 900°C (air cooling) |
| Annealing Temperature | 680°C – 710°C (furnace cooling) | |
| Stress Relief Temperature | 550°C – 650°C (air cooling) | |
| Oil Quenching Temperature | 840°C – 870°C | |
| Water Quenching Temperature | 820°C – 850°C | |
| Tempering Temperature | 540°C – 680°C (air cooling) | |
| Induction/Flame Hardening | 870°C – 900°C | |
| Forging | Forging Temperature Range | 1100°C – 1200°C |
| Minimum Forging Temperature | Avoid forging below 850°C | |
| Cooling Method | Slow cooling in air or sand to reduce thermal stress and deformation |
Duplex Treatment: Quenched, Tempered & Nitrided
C45R+N combines quenching & tempering (“R”) with nitriding (“N”), delivering a dual-phase treatment that significantly enhances both core strength and surface durability.
Superior Surface Hardness and Abrasion Resistance
The nitrided layer produces a hard compound and diffusion case—achieving up to ~1,000 HV—greatly reducing wear on critical components like gears, shafts, and bearings.
High Fatigue Strength and Crack Resistance
The combined R+N treatment yields substantial improvements in fatigue life—commonly 40–100% over untreated C45—due to high residual compressive stresses in the outer layer.
Minimal Distortion and Precise Dimensional Control
Nitriding proceeds at lower temperatures (~500–600 °C), minimizing thermal distortion and preserving dimensional accuracy, even for tight-tolerance components.
Balanced Mechanical Strength & Toughness
Core tensile strength (580–1050 MPa) and yield strength (≥430–565 MPa), combined with ≥25 J impact energy, ensure robust mechanical performance under dynamic loads.
Gears, Shafts & Bearings
Perfect for high-load rotating components requiring durable surface performance—nitrided surfaces enhance wear resistance and suppress scoring in gears, shafts, and bearings.
Mold Tools & Dies
Ideal for tools and dies used in forging, extrusion, and molding tasks. The nitrided layer delivers superior abrasion resistance and extended service life under cyclic stress.
Automotive & Machinery Components
Widely used for high-stress parts such as crankshafts, transmission shafts, and connection rods—where fatigue strength and surface hardness are essential.
Precision Engineering & General Mechanical Parts
Suited for components like axles, spindles, studs, and guides in general engineering contexts, offering a robust balance of core toughness and wear resistance.
A: C45R+N is an enhanced version of medium carbon steel C45. "R" indicates the steel is quenched and tempered, while "N" means it has undergone nitriding for improved hardness and wear resistance.
A: It offers superior surface hardness, enhanced fatigue strength, excellent wear resistance, minimal distortion after treatment, and a strong balance of core toughness and machinability.
A: It’s widely used in automotive, machinery, mold manufacturing, and general engineering for components like gears, shafts, bearings, and tools under heavy load.
A: Yes. C45R+N is a performance upgrade over C45, ideal for applications requiring higher surface durability, wear resistance, and fatigue life.
