25CrMo4 High Strength Steel Plate
Products Description 25CrMo4 High-Strength Steel Plate Chemical Composition 25CrMo4 is a chromium-molybdenum alloy steel characterized by its well-balanced composition: Carbon (C): 0.22–0.29% Chromium (Cr): 0.90–1.20% Molybdenum (Mo): 0.15–0.30% Manganese (Mn): 0.60–0.90%...
Description
Products Description
25CrMo4 High-Strength Steel Plate
Chemical Composition
25CrMo4 is a chromium-molybdenum alloy steel characterized by its well-balanced composition:
Carbon (C): 0.22–0.29%
Chromium (Cr): 0.90–1.20%
Molybdenum (Mo): 0.15–0.30%
Manganese (Mn): 0.60–0.90%
Silicon (Si): ≤0.40%
Phosphorus (P) & Sulfur (S): ≤0.035% (each)
The synergistic effect of Cr and Mo enhances hardenability, tempering resistance, and high-temperature strength.
Microstructure
In the quenched and tempered (Q&T) condition, 25CrMo4 exhibits a tempered martensitic structure, providing an optimal combination of strength and toughness. The fine-grained microstructure is achieved through controlled rolling and heat treatment processes.
Key Properties
High tensile strength (700–900 MPa range)
Excellent fatigue resistance and impact toughness
Good weldability (preheating recommended for thick sections)
Superior creep resistance at elevated temperatures (up to 500°C)
Typical Applications
Power Generation: Turbine components, high-pressure piping systems
Automotive: Critical load-bearing parts (axles, gears, crankshafts)
Oil & Gas: Drill collars, wellhead equipment, pressure vessels
Heavy Machinery: Hydraulic cylinders, crane booms, mining equipment
Standards Compliance
EN 10083-3 (European Norm)
Equivalent to ASTM A29 4130 (with slight compositional variations)
The steel is typically supplied in heat-treated conditions (e.g., quenched and tempered) to meet specific mechanical property requirements.
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