| Quantity: | |
|---|---|
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.52–0.60 |
| Silicon (Si) | 0.17–0.37 | |
| Manganese (Mn) | 0.65–0.95 | |
| Sulfur (S) | ≤ 0.030 | |
| Phosphorus (P) | ≤ 0.030 | |
| Chromium (Cr) | 0.65–0.95 | |
| Nickel (Ni) | ≤ 0.35 | |
| Copper (Cu) | ≤ 0.25 | |
| Vanadium (V) | 0.10–0.20 | |
| Mechanical Properties | Tensile Strength σb (MPa) | ≥ 1225 (125) |
| Yield Strength σ0.2 (MPa) | ≥ 1080 (110) | |
| Elongation δ5 (%) | ≥ 9 | |
| Section Shrinkage ψ (%) | ≥ 20 | |
| Hardness (Hot Rolled) | ≤ 321 HB | |
| Hardness (Cold Rolled + Heat Treated) | ≤ 321 HB | |
| Heat Treatment | Normalizing Temperature | 850°C – 880°C |
| Normalizing Description | Rapid air cooling to increase hardness | |
| Tempering Temperature | 150°C – 200°C | |
| Tempering Description | Enhances toughness and wear resistance | |
| Forging | Hot Forming Temperature | 1050°C – 850°C |
High Hardenability
Thanks to optimized carbon and chromium content, 55Cr3 develops deep and uniform hardness throughout thick sections when quenched and tempered
Exceptional Wear Resistance
Its alloyed chemistry (Cr, Mn, V) provides superior resistance to abrasive wear, extending service life in high‑stress mechanical parts 、
High Strength & Toughness
With tensile strength exceeding 1225 MPa and strong elongation/area reduction, it handles heavy loads while maintaining ductility
Excellent Decarburization Resistance
Compared to carbon‑manganese steels, 55Cr3 is less prone to surface decarburization during heat treatment, preserving fatigue strength and surface integrity
Reliable Hot Working Performance
It offers good hot forgeability and thermal process stability with lower overheated sensitivity, making it well suited for forming large springs and heavy components
Heavy-Duty Leaf Springs
Widely used in trucks, railcars, and industrial vehicles for thick-section leaf springs that require high load-bearing capacity.
Large Coil Springs
Ideal for manufacturing heavy-duty coil springs in agricultural and construction machinery where strength and resilience are critical.
Stabilizer and Torsion Bars
Applied in automotive stabilizer bars and torsion rods to withstand cyclic loads and enhance suspension stability.
High-Load Bearings and Gears
Suitable for producing gears, shafts, and bearings that demand high wear resistance and fatigue strength under heavy loads.
A: It offers high hardenability, excellent wear resistance, and superior mechanical strength for demanding applications.
A: 55Cr3 is commonly used in leaf springs, coil springs, stabilizer bars, and high-load gears and bearings.
A: Yes, it responds well to normalizing and tempering processes to improve hardness, toughness, and wear resistance.
A: Absolutely. Its high tensile and yield strength make it ideal for components subjected to high stress and impact.
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.52–0.60 |
| Silicon (Si) | 0.17–0.37 | |
| Manganese (Mn) | 0.65–0.95 | |
| Sulfur (S) | ≤ 0.030 | |
| Phosphorus (P) | ≤ 0.030 | |
| Chromium (Cr) | 0.65–0.95 | |
| Nickel (Ni) | ≤ 0.35 | |
| Copper (Cu) | ≤ 0.25 | |
| Vanadium (V) | 0.10–0.20 | |
| Mechanical Properties | Tensile Strength σb (MPa) | ≥ 1225 (125) |
| Yield Strength σ0.2 (MPa) | ≥ 1080 (110) | |
| Elongation δ5 (%) | ≥ 9 | |
| Section Shrinkage ψ (%) | ≥ 20 | |
| Hardness (Hot Rolled) | ≤ 321 HB | |
| Hardness (Cold Rolled + Heat Treated) | ≤ 321 HB | |
| Heat Treatment | Normalizing Temperature | 850°C – 880°C |
| Normalizing Description | Rapid air cooling to increase hardness | |
| Tempering Temperature | 150°C – 200°C | |
| Tempering Description | Enhances toughness and wear resistance | |
| Forging | Hot Forming Temperature | 1050°C – 850°C |
High Hardenability
Thanks to optimized carbon and chromium content, 55Cr3 develops deep and uniform hardness throughout thick sections when quenched and tempered
Exceptional Wear Resistance
Its alloyed chemistry (Cr, Mn, V) provides superior resistance to abrasive wear, extending service life in high‑stress mechanical parts 、
High Strength & Toughness
With tensile strength exceeding 1225 MPa and strong elongation/area reduction, it handles heavy loads while maintaining ductility
Excellent Decarburization Resistance
Compared to carbon‑manganese steels, 55Cr3 is less prone to surface decarburization during heat treatment, preserving fatigue strength and surface integrity
Reliable Hot Working Performance
It offers good hot forgeability and thermal process stability with lower overheated sensitivity, making it well suited for forming large springs and heavy components
Heavy-Duty Leaf Springs
Widely used in trucks, railcars, and industrial vehicles for thick-section leaf springs that require high load-bearing capacity.
Large Coil Springs
Ideal for manufacturing heavy-duty coil springs in agricultural and construction machinery where strength and resilience are critical.
Stabilizer and Torsion Bars
Applied in automotive stabilizer bars and torsion rods to withstand cyclic loads and enhance suspension stability.
High-Load Bearings and Gears
Suitable for producing gears, shafts, and bearings that demand high wear resistance and fatigue strength under heavy loads.
A: It offers high hardenability, excellent wear resistance, and superior mechanical strength for demanding applications.
A: 55Cr3 is commonly used in leaf springs, coil springs, stabilizer bars, and high-load gears and bearings.
A: Yes, it responds well to normalizing and tempering processes to improve hardness, toughness, and wear resistance.
A: Absolutely. Its high tensile and yield strength make it ideal for components subjected to high stress and impact.
