Jan 25, 2020 both normalized saeaisi and saeaisi m steel are iron alloys. Its hardenability is excellent, allowing large section sizes to be heat treated with maintained through hardness. It has good harde na bil ity, good fatigue properties and excellent resistance to impact and abrasion. A correlation between low cycle fatigue properties and. As mentioned above, prehardened and tempered steel propegties or plates can be further surface hardened by either the flame or induction hardening methods resulting in a case hardness in excess of rc hardened and tempered alloy steel can also be nitrided, giving a surface hardness of up to rc aisi. Aisi 4340 steel stockholders and suppliers, delivering to the whole of the uk. The level of hardness is selected to give useful strength while still maintaining the ability to machine the material into finished components. High strength in heavy sections is possible with maximum toughness and ductility. With a lower carbon content range aisi 4 provides better. Composition and mechanical properties of 4340 billet steel composition mechanical properties elements % weight properties units chromium 0. However, the hy100 model failed to produce results that were in agreement with experimental stressstrain data for 4340 steel. The chemical composition of aisi 4 alloy steel is listed in the following table.
This specification is for a premium aircraftquality, lowalloy steel in the form of bars, forgings, mechanical tubing, and forging stock. Furthermore, steel can have its mechanical properties easily improved by heat treatment1. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. Jan 12, 2020 both normalized saeaisi and saeaisi m steel are iron alloys. It may be heat treated to produce a strong, tough core and high case hardness. Data sheet lescalloy 4340 v 4340 vacarc high strength alloy steel typical composition 0. Pre hardened and tempered 4340 can be further surface hardened by flame or. Properly hardened and formed, it can be used to make hardwearing machine parts. M is a low alloy, vacuum melted, steel of very high strength and toughness. En24t properties make it suitable for the manufacture of parts. As mentioned above, prehardened and tempered steel propegties or plates can be further surface hardened by either the flame or induction hardening methods resulting in a case hardness in excess of rc hardened and tempered alloy steel can also be nitrided, giving a surface hardness of up to rc aisi alloy steel should be. The steel alloy of grade 8620 is also called nickelchromiummolybdenum steel. Because of richer alloy content, 4340 possesses much deeper hardenability than the 4100 series. Chemical composition and alloying elements of steel.
It has remarkable nondistorting properties for an alloy steel. As a result, we have increased our inventory of alloy bar products to better serve customers who rely on these high quality grades. It is a modified steel with silicon, vanadium and slightly greater carbon and. Welding of steel in the hardened and tempered condition as normally suppliedis not recommended and should be specificatoon if at all possible, because of the danger of quench cracking, as the mechanical properties. Alloy bar tw metals has achieved exceptional success in serving major defense prime contractors, critical aircraft part producers, and heavy industrial parts manufacturers. The 4340 steel properties are displayed in table 1. Also has excellent nondistorting properties for an alloy steel. May 12, 2020 both normalized saeaisi and saeaisi m steel are iron alloys. Astm 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0. It is a nickelchromiummolybdenum medium carbon alloy steel with deep hardenability.
The thickness of bare steel exclusive of all coatings. Comparison of high cycle fatigue in 4340 and 300m steel welded with fiber laser article pdf available in advanced materials research 891892. Jun 25, 2019 en24 material specification pdf en24 steel properties. Sae 4340 is a typical low alloy medium carbon steel for quenching and tempering. Within these limits, which may be broad or narrow, the steel producer has complete freedom to use his skill and knowledge to make steel with the required mechanical properties. If you do not see its contents the file may be temporarily unavailable at the journal website or you do not have a pdf plugin installed and enabled in your browser. Mechanical properties analysis of 4340 steel specimen heat treated in oven and quenching in three different fluids article pdf available in metals and materials international 245. Alloy steel equivalent grades internal standard bs din is en saeaisi en18 530a40 37cr4 40cr1 en18 5140 en24 817m40 34crnimo6 40nicr4mo3 en24 4340 en19c 709m40 40cr4mo3 en19c 4140,4142 en19 709m40 42cr4mo2 40cr4mo3 en19 4140,4142 en18d 530a40 37cr4 40cr1 en18d 5140 en18c 530a40 37cr4 40cr1 en18c 5140. Tumse dil kya laga liya humne full hd movie free download 1080p. 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. Whilst 4340 is normally oil quenched, due to the high hardenability small sections may be air hardened.
In this work, the mechanical properties and microstructures of aisi 4340 high strength alloy steel under different tempering conditions are investigated. It is a sturdy alloy, largely composed of carbon, with many uses in the manufacturing trades. The tensile properties and the fracture toughness of the modified aisi 4340 steels in various heat treated conditions were measured. Pdf the weldability of aisi 4340aisi 2205 steels using. Analysis of quenching parameters in aisi 4340 steel by. Pdf comparison of high cycle fatigue in 4340 and 300m steel.
Follow the links below to view complete property information. The mechanical properties tensile strength, yield point, etc. A steel meeting the compositional requirements of the american institute of steel and iron aisi 4340 was used in this study. Tensile steel, generally supplied hardened and tempered to condition. Jun 25, 2019 en24 a popular grade of throughhardening alloy steel, readily machinable in the t condition. The specific heat and the thermal conductivity are temperature dependant and their dependency is taken into account in our model. Table i shows the spectrometric analysis of aisi 4340 steel with clear depiction of the wt. Aisi has the following chemical composition in wt% of alloying element.
Alloy steel 4340 metal supermarkets steel, aluminum. Relationship between fracture toughness and fracture surface. The weldability of aisi 4340aisi 2205 steels using friction welding article pdf available in optoelectronics and advanced materialsrapid communications 978. En24 material specification pdf en24 steel properties. Both properties achieved with the initial forging reduction of 1. It has low carbon content, and can be welded easily. Aisi 4340 has a favorable response to heat treatment usually oil quenching followed by tempering and exhibits a good combination of ductility and strength when treated thusly.
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. It also contains the use of aisi 4320,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. 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. Saeaisi wrought steels top, all iron alloys middle, and the entire database bottom. The results were consistent with the requirements of aisi 4340 and are given in. This advantage is realized principally where high strength is required in heavy sections. The search phrase you entered, 4340, is common to 61 materials, by searching on the terms 4340 in most common text fields. And it has good toughness, fatigue resistance, impact toughness and etc. Throughhardening low alloy steel bar 4340 atlas steels. The chemical composition was measured through glow discharge spectroscopy leco gds 750a. Among the high number of steels, aisi 4340 is widely used due to a combination of high mechanical strength, ductility and hardness.
It has high toughness and strength in the heat treated condition. It is used mainly in power transmission gears and shafts, aircraft landing gears, and other structural parts. Influence of austenitizing on the mechanical properties of. Nov 07, 2019 mechannical properties heat treated condition. Quenched and tempered saeaisi 4340 is saeaisi 4340 steel in the quenched and tempered condition.
Scuff resistance was measured in sliding tests using white mineral oil as the lubricant. This material has a high fatiguetensile ratio and maintains strength, ductility, and toughness at relatively high temperatures. The graph bars on the material properties cards below compare quenched and tempered saeaisi 4340 to. Aisi 4340 is a nickel chromium molybdenum alloy steel specification widely used in the oil and gas sectors. We can measure magnetic properties of steel rods standard samples. Sep 21, 2019 en24 a popular grade of throughhardening alloy steel, readily machinable in the t condition.
Relationship between fracture toughness and fracture. The 4340 steel has good shock and impact resistance as well as wear and abrasion resistance in the hardened condition 5. Ann based model for estimation of transformation hardening. Low cycle fatigue properties were estimated from measured tensile properties for specimens with a wide range of hardness. It offers good machinability in the normal, annealed or tempered conditions. Aisi 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. Scanning based induction heating for aisi 4340 steel spline. The mechanical threshold stress model for various tempers. There are 10 material properties with values for both materials. Mar 22, 2019 both normalized saeaisi and saeaisi m steel are iron alloys. Pdf mechanical properties analysis of 4340 steel specimen heat.
A graph of the oxygen content in steel over the last 25 years is shown in fig. Typical applications of 4340 ams 6414 include the aerospace and defense industries for structural use, including aircraft landing gear and power transmission gears. A correlation is demonstrated between the lowcycle fatigue properties and the scuff resisting properties of 4340 steel. In essence, steel is composed of iron and carbon, although it is the amount of carbon, as well as the level of impurities and additional alloying elements that determine the properties. En24 a popular grade of throughhardening alloy steel, readily machinable in the t condition. Samples were evaluated in standard tensile test to access their characteristic quantities. Both normalized saeaisi and saeaisi m steel are iron alloys. Aisisae 4340 alloy steel 4340 steel properties all metals. Both normalized saeaisi 4140 and saeaisi 4340 steel are iron alloys. The steel producer is informed that he must keep within the limits which are deemed to be acceptable for the type of steel considered. Following table 3 are its composition and properties. Aisi 4340 alloy steel is a heat treatable and low alloy steel containing chromium, nickel and molybdenum. Sheet steel or strip steel that is manufactured by 1 press braking blanks sheared from sheets or cut length of coils or plates, or by 2 continuous roll forming of cold or hotrolled coils of sheet steel. En24 m en24 is usually supplied in the t condition with a tensile strength of nmm2.
Aisi or sae 4140 steel alloy is a lowalloy steel containing chromium and molybdenum as strengthening agents. Aisi 4 alloy steel contains chromium and molybdenum as strengthening agents. U in sections up to 100mm, with a tensile strength of 930 1080 mpa and aiming for. To learn more about 4340 alloy steel contact us today, or fill in our online quote form and well get right back to you. Mechanical characterization and microstructural analysis. This steel can obtain much deeper hardenability than 4100 series steel. Steel has many engineering applications and is used in many processes involving high strain rates and high stresses2. Datasheet for steel grades carbon steel aisi 4320 aisi 4320 standard. May 03, 2020 en24 a popular grade of throughhardening alloy steel, readily machinable in the t condition.
They have a very high 98% of their average alloy composition in common. Phosphorus, p max sulfur, s max mechanical properties. Throughhardening low alloy steel bar 4340 colour code. It is supplied as round bar commonly in the hardened and tempered condition with a hardness of 1822 hrc. The addition of molybdenum prevents the steel from being susceptible to temper brittleness. The following are the mechanical properties for both normalized and annealed 4 and 4340 steel. Aisi 4 is a chromium molybdenum alloy steel specification. Jade band marigold introduction atlas 4340 is a nominally 1. The chemical properties of 4 and 4140 steel have differences in carbon, manganese and chromium concentrations. Mechanical characterization and microstructural analysis of. The following table shows the chemical composition of aisi 4340 alloy steel. This paper attempts to redress that lacuna by providing the mts parameters for a number of tempers of 4340 steel classi. Steel weldability is poor, need high temperature preheating before welding.
The z steel is an achievement of improved steelmaking facility and operating conditions made possible by cooperation with a steel maker on the basis of numerous life test data. The mechanical properties of annealed aisi 4340 alloy steel are displayed in the following table. Mechanical properties and hardenability emj metals. According to the world steel association, there are over 3,500 different grades of steel, encompassing unique physical, chemical, and environmental properties.
Aisi 4340 is also one kind of nickel chromium molybdenum steels. The aisi 4340 steel has a raw nonmartensitic microstructure that ap pears in figure 2, bottom right. Aisi 4 alloy steel is a medium carbon, low alloy steel in astm a29 standard. Mechanical properties and microstructural features of aisi 4340 high. Specimen yield strength mpa ultimate strength mpa elongation % area reduction. For each property being compared, the top bar is normalized saeaisi 4140 and the bottom bar is saeaisi 4340 steel. It is similar to 4140 steel which has a higher carbon level 0. A through hardening steel which in the quenched and tempering condition is capable of high strengths. This combination assures deep hardening when oil quenched and high strength characteristics throughout the section. Aisi 4 alloy steel aisi 4 steel stockholders and suppliers, delivering to the whole of the uk.
1540 183 734 1350 1520 830 186 1232 1080 1126 701 453 1338 847 1064 1223 418 484 1540 447 45 831 109 741 1141 227 1478 698 1177 724 277 850 475 1439 714 934 708