In the aerospace field, AISI4340 high-strength alloy steel is often used in the manufacture of aircraft engine parts, such as transmission shafts, gears, bearings, etc. Here's a detailed description of what the application looks like:
AISI4340 standard: AISI A29 A29M-04
American AISI4340 special steel.
AISI4340 Chemical Composition:
Carbon c: 038～0.43
Silicon si: 015～0.35
Manganese mn: 060～0.90
Sulfur s : 0040
Phosphorus p : 0035
Chromium cr: 060～0.90
Nickel ni:165～2.00
Copper cu: 0025
Molybdenum mo: 020～0.30
AISI4340 Mechanical Properties:
Tensile Strength b (MPa): 980(100).
Yield Strength S (MPa): 835(85).
Elongation δ5 : 12
Section shrinkage 55
Impact power AKV (J): 78
Impact toughness value kv (j cm2): 98(10).
Hardness : 269HB
Propeller shaft: The high strength and excellent toughness of AISI4340 alloy steel make it an ideal material for manufacturing aircraft engine propeller shafts. As an important rotating part of an aircraft engine, the propeller shaft requires high strength and wear resistance to ensure the stable operation of the engine.
Gears: AISI4340 alloy steel excels in the manufacture of aircraft engine gears. As a key component for transmitting power and changing speed, gears need to withstand high strength and high loads, and the selection of AISI4340 alloy steel can ensure that the gears have good durability and reliability.
Bearings: Aircraft engine bearings require materials with high strength, hardness, and wear resistance to withstand high-speed rotation and stress under complex operating conditions. AISI4340 alloy steel performs well in the manufacture of bearings, providing reliable support and rotational performance for aircraft engines.
To sum up, AISI4340 high-strength alloy steel is especially suitable for manufacturing aircraft engine parts in the aviation field, such as propeller shafts, gears, bearings, etc. While ensuring the performance and safety of aircraft engines, AISI4340 alloy steel can meet the requirements of parts under high loads, high speeds and extreme working conditions, and is one of the most favored materials in the aviation industry.
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