| Quantity: | |
|---|---|
| Category | Parameter | Value |
|---|---|---|
| Chemical Composition | Carbon (C) | 0.38% – 0.45% |
| Silicon (Si) | 0.17% – 0.37% | |
| Manganese (Mn) | 0.50% – 0.80% | |
| Sulfur (S) | ≤ 0.035% (Allowable residual) | |
| Phosphorus (P) | ≤ 0.035% (Allowable residual) | |
| Chromium (Cr) | 0.90% – 1.20% | |
| Nickel (Ni) | ≤ 0.30% (Allowable residual) | |
| Copper (Cu) | ≤ 0.30% (Allowable residual) | |
| Molybdenum (Mo) | 0.15% – 0.25% | |
| Mechanical Properties | Tensile Strength σb (MPa) | ≥ 1080 (110) |
| Yield Strength σs (MPa) | ≥ 930 (95) | |
| Elongation δ5 (%) | ≥ 12 | |
| Area Shrinkage ψ (%) | ≥ 45 | |
| Impact Power Akv (J) | ≥ 63 | |
| Impact Toughness αkv (J/cm²) | ≥ 78 (8) | |
| Hardness | ≤ 217 HB | |
| Heat Treatment | Annealing | 500–700°C preheat, 800–900°C heating, slow cooling |
| Quenching & Tempering | 500–700°C preheat, 850–880°C heating, water/oil quench, 300–600°C temper | |
| High-Frequency Induction Quenching | Surface heating + 200°C temper for 2h | |
| Forging | Preliminary Preparation | Heat to temp, hold, air/oil cooling |
| Forging Temperature | Optimal: 950–1200°C; Recommended: 1050–1150°C | |
| Forging Ratio | Must be sufficient to reduce segregation & porosity | |
| Post-Forging Heat Treatment | Normalizing or quenching + tempering |
Exceptional Strength & Hardness:
42CrMo offers ultra‑high tensile (≥1080 MPa) and yield strength (≥930 MPa) combined with hardness up to 217 HB for demanding structural applications.
Excellent Toughness & Fatigue Resistance:
With superior impact toughness and fatigue limit—especially at low temperature—it sustains dynamic loads and repetitive stress without brittle failure.
Outstanding Hardenability:
Enriched by chromium and molybdenum alloying, this steel delivers deep, uniform hardening with minimal quench deformation.
Wide Machinability & Workability:
Despite its strength, 42CrMo machines and polishes well and accepts plating, making it convenient for gear, shaft and mold fabrication.
Versatile Industry Applications:
Commonly used for gears, bearings, shafts, molds in automotive, aerospace, oil & gas and machinery industries due to reliable mechanical performance.
Heavy‑Duty Gears & Shaft Components:
Ideal for manufacturing high-performance gears, transmission shafts, and crankshafts in automotive and machine tool industries due to its superior fatigue resistance and wear strength
Industrial Bearings & Fasteners:
Commonly used in heavy‑stress bearings, bolts, and axles where high mechanical strength and impact toughness are essential
Oil & Gas Drilling & Pipeline Parts:
Used in drill rods, casing, pressure piping and valve bodies for its excellent wear resistance and ability to withstand harsh environments
Aerospace & Machinery Structural Components:
Preferred for landing gear parts, high‑stress structural pins, and machine tool spindles due to its high hardenability, toughness, and fatigue strength
Q: What is 42CrMo steel used for?
A: 42CrMo is commonly used in gears, shafts, bolts, bearings, and oil & gas components due to its high strength and wear resistance.
Q: Can 42CrMo be heat treated?
A: Yes, 42CrMo responds well to quenching, tempering, annealing, and high-frequency surface hardening treatments.
Q: Is 42CrMo suitable for machining?
A: Yes, it offers good machinability while maintaining excellent mechanical performance after processing.
Q: What industries commonly use 42CrMo?
A: It is widely used in automotive, aerospace, oil & gas, heavy machinery, and tool manufacturing industries.
| Category | Parameter | Value |
|---|---|---|
| Chemical Composition | Carbon (C) | 0.38% – 0.45% |
| Silicon (Si) | 0.17% – 0.37% | |
| Manganese (Mn) | 0.50% – 0.80% | |
| Sulfur (S) | ≤ 0.035% (Allowable residual) | |
| Phosphorus (P) | ≤ 0.035% (Allowable residual) | |
| Chromium (Cr) | 0.90% – 1.20% | |
| Nickel (Ni) | ≤ 0.30% (Allowable residual) | |
| Copper (Cu) | ≤ 0.30% (Allowable residual) | |
| Molybdenum (Mo) | 0.15% – 0.25% | |
| Mechanical Properties | Tensile Strength σb (MPa) | ≥ 1080 (110) |
| Yield Strength σs (MPa) | ≥ 930 (95) | |
| Elongation δ5 (%) | ≥ 12 | |
| Area Shrinkage ψ (%) | ≥ 45 | |
| Impact Power Akv (J) | ≥ 63 | |
| Impact Toughness αkv (J/cm²) | ≥ 78 (8) | |
| Hardness | ≤ 217 HB | |
| Heat Treatment | Annealing | 500–700°C preheat, 800–900°C heating, slow cooling |
| Quenching & Tempering | 500–700°C preheat, 850–880°C heating, water/oil quench, 300–600°C temper | |
| High-Frequency Induction Quenching | Surface heating + 200°C temper for 2h | |
| Forging | Preliminary Preparation | Heat to temp, hold, air/oil cooling |
| Forging Temperature | Optimal: 950–1200°C; Recommended: 1050–1150°C | |
| Forging Ratio | Must be sufficient to reduce segregation & porosity | |
| Post-Forging Heat Treatment | Normalizing or quenching + tempering |
Exceptional Strength & Hardness:
42CrMo offers ultra‑high tensile (≥1080 MPa) and yield strength (≥930 MPa) combined with hardness up to 217 HB for demanding structural applications.
Excellent Toughness & Fatigue Resistance:
With superior impact toughness and fatigue limit—especially at low temperature—it sustains dynamic loads and repetitive stress without brittle failure.
Outstanding Hardenability:
Enriched by chromium and molybdenum alloying, this steel delivers deep, uniform hardening with minimal quench deformation.
Wide Machinability & Workability:
Despite its strength, 42CrMo machines and polishes well and accepts plating, making it convenient for gear, shaft and mold fabrication.
Versatile Industry Applications:
Commonly used for gears, bearings, shafts, molds in automotive, aerospace, oil & gas and machinery industries due to reliable mechanical performance.
Heavy‑Duty Gears & Shaft Components:
Ideal for manufacturing high-performance gears, transmission shafts, and crankshafts in automotive and machine tool industries due to its superior fatigue resistance and wear strength
Industrial Bearings & Fasteners:
Commonly used in heavy‑stress bearings, bolts, and axles where high mechanical strength and impact toughness are essential
Oil & Gas Drilling & Pipeline Parts:
Used in drill rods, casing, pressure piping and valve bodies for its excellent wear resistance and ability to withstand harsh environments
Aerospace & Machinery Structural Components:
Preferred for landing gear parts, high‑stress structural pins, and machine tool spindles due to its high hardenability, toughness, and fatigue strength
Q: What is 42CrMo steel used for?
A: 42CrMo is commonly used in gears, shafts, bolts, bearings, and oil & gas components due to its high strength and wear resistance.
Q: Can 42CrMo be heat treated?
A: Yes, 42CrMo responds well to quenching, tempering, annealing, and high-frequency surface hardening treatments.
Q: Is 42CrMo suitable for machining?
A: Yes, it offers good machinability while maintaining excellent mechanical performance after processing.
Q: What industries commonly use 42CrMo?
A: It is widely used in automotive, aerospace, oil & gas, heavy machinery, and tool manufacturing industries.
