44NiCrMo3

Chemical Composition

The composition of 44NiCrMo3 includes:

Element	Range (%)
Carbon (C)	0.38 – 0.43
Manganese (Mn)	0.50 – 0.80
Silicon (Si)	0.15 – 0.35
Nickel (Ni)	1.30 – 1.70
Chromium (Cr)	0.90 – 1.20
Molybdenum (Mo)	0.15 – 0.30
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.035

Mechanical Properties

44NiCrMo3 offers a balance of strength and toughness, making it suitable for high-stress applications:

Property	Value
Yield Strength (MPa)	850 – 1000
Tensile Strength (MPa)	950 – 1150
Elongation (%)	≥ 10
Hardness (Brinell)	235 – 285 HB

Heat Treatment

To achieve desired mechanical properties, 44NiCrMo3 undergoes several heat treatment processes:

• Annealing: Heating to 850-900°C and slow cooling to improve machinability and relieve stress.
• Hardening: Heating to 830-880°C followed by quenching in oil or water to increase hardness.
• Tempering: Reheating to 500-700°C after hardening to improve toughness and reduce brittleness.

Applications

44NiCrMo3 is used in various demanding applications due to its high strength and toughness:

• Automotive Industry: Gears, shafts, and crankshafts.
• Aerospace: Structural components and critical fasteners.
• Industrial Machinery: High-load gears, bearings, and tool components.

Titan Steel & Engineers Related Products:

Carbon Steel, Alloy Steel, Bright Steel, Spring Steel, Die Steel & Tool Steel, Special Alloy Steel

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Comparison with Other Alloy Steel Grades

To provide a clearer context, here’s a comparison of 44NiCrMo3 with other similar alloy steel grades:

Steel Grade	Carbon (C)	Chromium (Cr)	Nickel (Ni)	Molybdenum (Mo)	Typical Applications
44NiCrMo3	0.38 – 0.43	0.90 – 1.20	1.30 – 1.70	0.15 – 0.30	Automotive gears, aerospace components, industrial machinery
42CrMo4	0.38 – 0.45	0.90 – 1.20	0.80 – 1.20	0.15 – 0.30	Similar applications but slightly less nickel content
4140	0.38 – 0.43	0.80 – 1.10	0.75 – 1.00	0.15 – 0.30	General engineering applications, oil and gas industry
4340	0.38 – 0.43	0.60 – 0.75	1.65 – 2.00	0.20 – 0.30	Aerospace, automotive, high-stress applications