Alloy Steel 4340 MOD

AMS 6419, BMS 7-26, MIL-S-8844 CL3, AMS 6257, AMS 6417, DMS 1935, GM 1012 CPS 4911, CE-0896, C-05-1190, MTL 1201, MAT 137, PWA LCS F-17

Alloy Steel 4340 MOD Plate

4340 plates of this alloy are available and used for a multitude of products, even circuit boards for electric devices or as a kind of decorative laminates.

Alloy Steel 4340 MOD Sheet

As with the 4340 plate, the sheet has many uses that are similar. Not only are these useful for the aerospace industry but for the construction and automotive ones as well. Furthermore, these plates can be used in bicycles and firearm production.


Alloy Steel 4340 MOD Bars

4340 Bars have a diverse availability depending on use. They can be used to create pinions and gears, shafts, axles, springs, various machinery parts, bolts, heavy duty pins, and even hand tools.

Availability: • 4340 MOD/300M

Alloy Steel 4330 MOD Distributor and Supplier

AS 4340 (a specific type of alloy steel) is a heat treatable, low alloy kind of steel that contains chromium, molybdenum, and nickel. Its UNS designation is G43400. This alloy is a part of a diverse family of alloy steel types that have been developed for a wide variety of purposes. It is a favored material for use in the aircraft landing gear, power transmission gears and shafts, and other relevant structural parts. 4340 in particular has a specialized combination of properties such as high toughness as well as strength when presented in the heat-treated condition. That unique blend of qualities is exactly why 4340 is preferred as a material for various aerospace applications and other engineering feats found within related industries. This specific alloy of steel is reliable for use in various important applications where failures must be avoided.

This alloy steel was developed as one of the nickel-chromium-molybdenum kinds which is medium carbon steel. It contains rather large sections of strength and is noted for its toughness. When it is supplied, it is typically hardened as well as tempered to achieve a high tensile range. In general, alloy steels were first patented in 1865 by Julius Baur, an American metallurgist. The steel was then produced at the Chrome Steel Co. in Brooklyn, New York. Chromium alloy was further developed for more popularity by Henri-Ami Brustlein, a French metallurgist, in subsequent years. Certain alloys have become increasingly popular as the aviation industry and even space exploration has increased the demand for materials capable of enduring the environments they are subjected to in such crafts. Commonly, many of these alloys are also utilized in other high-pressure, high-temperature, and chemically exposed applications. These other applications may include submarine or shipbuilding or even various vessels or nuclear industry related parts and components.

Chemistry of Alloy Steel 4340 MOD

The chemistry of this alloy consists of Iron (Fe), Nickel (Ni), Chromium (Cr), Manganese (Mn), Carbon (C), Molybdenum (Mo), Silicon (Si), Sulfur (S), Phosphorus (P). There are also specifications to the percentage by weight of these elements such as Iron (95%), Nickel (1 to 2%), Chromium (less than 1%), Manganese (less than 1%), Carbon (less than 1%), Molybdenum (less than 1%), Silicon (less than 1%), Sulfur (less than 1%), Phosphorus (less than 1%). This 4340 alloy has a density of 7.85 g/cm3 (or 0.284 lb/in3). It has a Rockwell C hardness of 17, a 22% elongation at break, a shear modulus of 80 GPa (or 11600 ksi), and an elastic modulus of 190 to 210 GPa (or 27557 to 30458 ksi). This alloy also has a yield strength of 470 MPa (or 68200 psi) and ultimate tensile strength of 745 MPa (or 108000 psi). Its melting point is at 2600 degrees F and its Poisson's ratio is between 0.27 and 0.30. It has a 50% reduction in area as well. This alloy, therefore, demonstrates a wide variety of strengths that make it an ideal choice for a number of applications in various industries, but especially for plane parts and other elements critical in the aerospace field.
The specifications for this alloy include 4340 MOD/300M, AMS 6257, AMS 6417, AMS 6419, BMS 7-26, DMS 1935, GM1012 CPS 4911, CE-0896, C-05-1190MTL, C-05-1190MTL 1201, MAT 137, MIL-S-83030 CL 3, and PWA LCS F-17. It advised that this grade of the alloy be tempered with temperatures to achieve the specific desired level of strength. The machining process of this alloy means it can be done in annealed or even normalized and tempered kinds of conditions. It can be welded with resistance or fusion methods of welding. It is best to use preheat as well as post-heat types of weld procedures after using these methods to weld the material. Heat-treated at 1525 degrees F, this alloy is then quenched in oil. Cold working it in the annealed condition will work for many conventional methods, enhancing its high ductility. This alloy is often used in landing gear on account of its various strength properties, but t is also critical for engine and transmission related components. This alloyed steel 4340 is available in different specifications, each having been created by a variety of industries that use such alloys commonly. The specifications for this alloy can include 4340MOD / 300M, MIL-S-83030 CL 3, AMS 6257, AMS 6417, AMS 6419, BMS 7-26, DMS 1935, GM1012 CPS 4911, CE-0896, C-05-1190MTL, C-05-1190MTL 1201, MAT 137, and PWA LCS F-17.

Our Alloy Steel 4340 MOD Products

At AMC, we are able to sell various products of excellent quality that are ideally used producing various plane as ruled by the Federal Aviation Administration (FAA) and its specifications. The parts for aircrafts this alloy is used for include machined parts as well as structural components, tie rods, castings, springs, and control cables. The kinds of this alloy available at AMC are categorized AMS specification numbers of 5528 to 5682. For this particular alloy, we sell bar, sheet, and plate forms.

Have Question?

If you have any questions about AMC as a titanium distributor, feel free to contact us at 562-941-1616 or fill out the contact form online. We also provide free quotes.