FE2179 AISI 4340 Alloy Steel Flat Bar

Catalog No.	FE2179
Size	Customized
Shape	Flat Bar
M.O.Q	$300
Compositions	Fe, Ni, Cr, Mo
Other Trade Name	UNS G 43400
Density	7.85 g/cm3

AISI 4340 Alloy Steel is a versatile, heat-treatable, and high-strength steel known for its exceptional toughness, wear resistance, and suitability for a variety of applications in aerospace, automotive, and industrial engineering. As a leading global supplier of aluminum alloys, Stanford Advanced Materials (SAM) provides consistently high-quality AISI 4340 Alloy Steel products that are easily available, and we're capable of supplying custom materials per any specs/drawings you provide us with.

Other forms: Wire, Round Bar, Tube.

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Description

Specification

Description of AISI 4340 Alloy Steel Flat Bar

AISI 4340 is nickel-chromium-molybdenum alloy steel with very high strength. It has a favorable response to heat treatment of oil and exhibits a good combination of ductility and strength when treated thusly. Now it has been widely used in commercial and military aircraft, automotive systems, and forged hydraulic and other machine tool applications.

Flat Bar

Specification of AISI 4340 Alloy Steel Flat Bar

Element	Content (%)
Iron, Fe	95.195 - 96.33
Nickel, Ni	1.65 - 2.00
Chromium, Cr	0.700 - 0.900
Manganese, Mn	0.600 - 0.800
Carbon, C	0.370 - 0.430
Molybdenum, Mo	0.200 - 0.300
Silicon, Si	0.150 - 0.300
Sulfur, S	0.0400
Phosphorous, P	0.0350

Hardness Brinell	293 HB
Tensile strength	1014 MPa
Elongation at break	19 %
Reduction of area	60.40 %
Modulus of elasticity	200 GPa
Bulk modulus	159 GPa
Poissons ratio	29 %
Machinability	50 %
Shear modulus	78 Gpa
Density	7.85 g/cm3
Melting point	1427 °C

Specifications: ASTM A 829 / A6 SAE J404, AMS 2252/ 2301/6359 SAE J404

Applications of AISI 4340 Alloy Steel Flat Bar

Aircraft Landing Gear Components:

Utilized in the construction of various parts of aircraft landing gear, including struts and connecting rods, due to its high strength and durability.

Automotive Transmission Components:

Found in automotive systems, particularly in the manufacturing of transmission components such as gears and shafts, where its robust properties contribute to longevity and performance.

Forged Hydraulic Equipment:

Applied in the forging of hydraulic components, taking advantage of its excellent strength and impact resistance for reliable operation under pressure.

High-Strength Forged Steel Crankshafts:

Employed in the production of crankshafts for engines where high strength and fatigue resistance are essential for efficient and durable performance.

Power Transmission Gears and Shafts:

Used in the fabrication of gears and shafts for power transmission systems, offering wear resistance and toughness in demanding industrial applications.

Packaging:

Our AISI 4340 Alloy Steel is carefully handled during storage and transportation to preserve the quality of our product in its original condition.