The physical properties of aisi 4340 alloy steel are. Throughhardening low alloy steel bar 4340 colour code. The mechanical threshold stress model for various tempers. Sae aisi 4340 steel properties, heat treatment, equivalent. A contemporary alternative to 4340 is atlas 6582 throughhardening steel that has improved throughhardening characteristics and offers superior impact properties to 4340 at equivalent strength levels.
Effect of austempering conditions on the microstructure. Download this datasheet as pdf 4340 high tensile steel 4340 is a 1. It is known as an ultra high strength grade of steel and serves a variety of applications for highly stressed parts. Throughhardening low alloy steel bar 4340 atlas steels. Aisi 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. The mechanical threshold stress model for various tempers of aisi 4340 steel biswajit banerjee1 department of mechanical engineering, university of utah, salt lake city, ut 84112, usa abstract numerical simulations of highstrainrate and hightemperature deformation of pure metals and alloys require realistic plastic constitutive models. This heat treatable alloy is known for its toughness and highstrength in a heattreated condition. Aisi 4340 alloy steel aisi 4340 steel stockholders and suppliers, delivering to the whole of the uk. It is a nickelchromiummolybdenum medium carbon alloy steel with deep hardenability. Effect of the mechanical properties and corrosion behaviors of. It is weldable by both fusion and resistance welding, and offers good ductility in the annealed condition. The aim of the present study is to analyze the influence of nicrbsife coating applied by hvof process on the axial fatigue strength of aisi 4340 steel. Basically, en244340 sheet plate is an alloy of carbon and steel that is known to offer high strength and toughness relatively in all sectors. Aisi 4340 has a favorable response to heat treatment usually oil quenching followed by.
A comparison of fatigue properties of austempered versus quenched and tempered 4340 steel john m. Im certain your presentation will cover the differences between these structures, and how they relate to the mechanical properties. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. The present work aims to perform conventional hardening and austempering treatment with. And it has good toughness, fatigue resistance, impact toughness and etc.
The following table shows the chemical composition of aisi 4340 alloy steel. Jade band marigold introduction atlas 4340 is a nominally 1. Service steel aerospace is one of the largest distributors. Aisi 4340 is also one kind ofnickel chromium molybdenum steels. In an earlier study, the crack arrest fracture toughness of 4140 and 4340 steel was measured as a function of yield strength and test temperature. Aisi 4340, a high strength low alloy steel employed in aeronautical structural components, are always protected by various surface treatments. Download a pdf version of this data sheet for printing and future reference. U in sections up to 100mm, with a tensile strength of 930 1080 mpa and aiming for. Also has excellent nondistorting properties for an alloy steel. Steel of the alloy 4340 can be heat treated heated to a set temperature for the particular material and then quenched using an oil quench to increase the alloys strength.
Tumse dil kya laga liya humne full hd movie free download 1080p. The purpose of this study is to investigate the deformation behaviour of aisi 4340 alloy steel under high strain rates ranging from 500 to 3300 s. Download pdf email this page famous my its toughness and strength 4140 is medium carbon low alloy steel. Mosifarthe effect of single and double quenching and tempering heat treatments on the microstructure and mechanical properties of aisi 4140 steel. Aisi e4340 steel, oil quenched 800c 1470f, 595c 1100f. Materials chemistry and physics, 14 1986 cems study of fracture 385391 385 surfaces in sae 4340 steel c. Saeaisi wrought steels top, all iron alloys middle, and the entire database bottom. Printer friendly version pdf download download as pdf excel download.
Aisi 4340 tempered steel and aisi 2205 duplex stainless steel each. It has the lowest strength and highest ductility compared to the other variants of saeaisi 4340 steel. Aisi 4340 is also one kind of nickel chromium molybdenum steels. The shot peening effect on the fatigue results of coated aisi 4340 steel was also evaluated. Alloy steel 4340 is another alloy known for superior mechanical properties. We can measure magnetic properties of steel rods standard samples.
If the hardness requirement must be met for wear or other reasons, you would need to switch to a tool steel like an m2 or other comparable grade. A full bar means this is the highest value in the relevant set. The mechanical threshold stress model for various tempers of. High strength in heavy sections is possible with maximum toughness and ductility. Physical properties 4340 alloy steel physical properties are given in the following lists, including density, thermal expansion, elastic modulus, thermal conductivity, specific heat capacity and electrical resistance. Pdf effect of frequency on the properties of plasma. To learn more about 4340 alloy steel contact us today, or fill in our online quote form and well get right back to you. Cems study of fracture surfaces in sae 4340 steel pdf.
Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction. A comparison of mechanical properties and hydrogen. Pdf the weldability of aisi 4340aisi 2205 steels using. They have a very high 98% of their average alloy composition in common. The objective of the present investigation is to determine the transverse engineering mechanical and fracture toughness properties of electroslag remelted high strength aisi 4340 steel in plate sizes 0.
Lescalloy 4340 v 4340 vacarc high strength alloy steel typical composition 0. Aisi 4340 is a nickel chromium molybdenum alloy steel specification widely used in the oil and gas sectors. This steel can obtain much deeper hardenability than 4100 series steel. Fatigue performance of aisi 4340 steel nicrbsife hvof. It also contains the use of aisi 4340,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. Alloy steel 4340 metal supermarkets steel, aluminum. A comparison of mechanical properties and hydrogen embrittlement resistance of austempered vs quenched and tempered 4340 steel john m. Related specifications atlas 4340 lowalloy steel bar complies with grade as1444, grade 4340 andor astm a434a29 grade 4340. Heat treatment processes are commonly used to enhance the required properties of steel with or without change in chemical composition. The tables below list aisi 4340 steel properties, including physical and mechanical properties. Alloy steel 4340, also referred to as aisi 4340, is a nickel, chromium, and molybdenum alloy steel. Typical applications of 4340 ams 6414 include the aerospace and defense industries for structural use, including aircraft landing gear and power transmission gears. A wide variety of 4340 steel properties options are available to you, such as erw, hot rolled, and cold rolled. Pre hardened and tempered 4340 steels can be further surface hardened by.
This material has a high fatiguetensile ratio and maintains strength, ductility, and toughness at relatively high temperatures. When heat treated it is known for its toughness while preserving good fatigue strength. Mechanical properties analysis of 4340 steel specimen heat treated in oven and quenching in three different. With proper working and strengthening, items made from 4340 have excellent wear and durability qualities.
The mechanical properties of annealed aisi 4340 alloy steel are displayed in the following table. For each property being compared, the top bar is normalized saeaisi 4150 and the bottom bar is saeaisi 4340 steel. The tested temperatures are obtained by enclosing the specimen in a clamshell radiantfurnace. Microhardness depth profile of crosssection plasma nitrided aisi 4340 steel fig. Both normalized saeaisi 4150 and saeaisi 4340 steel are iron alloys. Aisi 4340 alloy steel is a heat treatable and low alloy steel containing chromium, nickel and molybdenum. Aisi 4340 steel, oil quenched 855c 1570f, 230c 450f. Data sheet lescalloy 4340 v 4340 vacarc high strength alloy steel typical composition 0. Pdf mechanical properties analysis of 4340 steel specimen heat. This specification is for a premium aircraftquality, lowalloy steel in the form of bars, forgings, mechanical tubing, and forging stock. It is an alloy structural grade which used by the sae. The fractured fatigue specimens were investigated using.
These steels can be subjected to unique melting and deoxidization processes for specific kind of applications. It is used in making gun parts, engine parts such as pistons, gears and bearings, and aircraft parts such as landing gear. This temper should provide you with mechanical properties that can resist plastic deformation in your application. The chemical composition and mechanical properties of steel decide its applicability for manufacturing various components in different areas of engineering interests. It can be heat treated to high strength levels while maintaining good toughness, wear resistance and fatigue strength levels, combined with good atmospheric corrosion resistance, and strength. Alloy steel en24 4340 sheet plate stainless steel pipes. It has high toughness and strength in the heat treated condition. Heat treatment of saeaisi 4340 alloy steel 4340 steel annealing slowly heat to 8008500. A comparison of fatigue properties of austempered versus.
About % of these are steel pipes, 14% are steel sheets, and 53% are steel round bars. The plastic deformation behaviour of aisi 4340 alloy steel. Effect of austempering conditions on the microstructure and. Syed, if youll take a look at the ttt curve you will see that you can you can get martensite, pearlite, or bainite with relative ease with 4340 thats one of the beauties of the alloy. The graph bars on the material properties cards below compare annealed saeaisi 4340 to. Steel alloy 4340 provides a good balance between strength and malleability. Datasheet for steel grades carbon steel aisi 4340 aisi 4340 standard. Aisi 4340 steel is a medium carbon, low alloy steel known for its toughness andstrength in relatively large sections. This material is available in both vacuum melt vm and air melt am. Tensile steel, generally supplied hardened and tempered to condition. Cems study of fracture surfaces in sae 4340 steel pdf free. A wide variety of 4340 steel properties options are available to you, such as technique, grade, and special pipe.