The astm a829 specification is the standard specification for alloy structural steel plates produced to chemical composition requirements and delivered in the asrolled green condition. The 4 alloy steel grade contains chromium and molybdenum for strength and hardenability, with lower carbon content than 4140 alloy steel to provide better weldability. For the mechanical properties of 4 steel, hardening behaviors until high strain rates of 10 3. An analysis of the mechanical behavior of aisi 4 steel after tig ultrahigh strength steels, such as aisi 4340 and sae 300m, to reduce weight and improve mechanical properties at the weld beads. Datasheet for steel grades carbon steel aisi 4 aisi 4 standard. Post free buying requirement for product sae4 aisi, astm, uns chemical composition and properties of european equivalents en for sae4 usa, aisi, astm. An analysis of the mechanical behavior of aisi 4 steel after tig and laser welding process. Pdf on the microstructural evolution of 4 steel during. Aisisae 4 steel grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength up to around 315.
It also contains the use of aisi 4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. Parts produced from the asrolled green plates are typically heat treated to obtained a combination of high strength and toughness. Similar to grade aisi 4 but with a slightly higher carbon content. A519 4 pipe american piping products stocks a5194 pipe in the following grades. Saeaisi wrought steels top, all iron alloys middle, and the entire database bottom. Chemical properties the chemical properties of 4 and 4140 steel are similar aside from differences in. Post free buying requirement for product sae4 aisi, astm, uns chemical composition and properties of european equivalents en for sae4 usa, aisi, astm, uns.
By outlining its makeup, strengths, and uses, this article may help readers decide if 4 steel fits their specific job. Aisi 4 steel, annealed at 865c 1590f 1585f, furnaced cooled 11c 20fhour to 680c 1255f, air cooled, 25 mm 1 in. Alloy steel 4, also referred to as chromoly steel and saeaisi 4, is a chromium and molybdenum alloy steel. It is also known for its hardenability, strength and ductility. Aisi or sae 4150 grade is a lowalloy steel containing chromium and molybdenum as strengthening agents. Aisi 4 alloy steel aisi 4 steel stockholders and suppliers, delivering to the whole of the uk. Aircraft alloy steels are grades intended for important or highly stressed parts and components in the aerospace industry. All dme steel is available in standard and custom widths, lengths and thicknesses, in rgm or finish ground dme steel plates dmeno. The following is a comparison of 4 grade steel and 4140 grade steel. On the microstructural evolution of 4 steel during hot compression. Aisi 4 is a low alloy steel containing molybdenum and chromium as strengthening agents.
It is similar to 4140 steel which has a higher carbon level. Sae aisi 4 chromoly steel, alloy material properties. The fb plates received by picatinny arsenal were crack free, whereas some macroscopic quench. Type 4 steel should be forged between 2250 and 1750. Astm 4 steel grades, properties and global standards. Please note that the two materials have significantly dissimilar densities. The higher carbon content of aisi 4140 gives greater strength and heat. With a lower carbon content range aisi 4 provides better. It is supplied as round bar commonly in the hardened and tempered condition with a hardness of 1822 hrc. Properties of 4 vary according to their process routine. The openhearth, the basic oxygen, and the electricarc pro cesses account for nearly all the steel tonnage produced in this coun try today. It is one of the most used aircraft steels because of 4s ease of manufacturing and weldability. The industry gateway for chemical engineering and plant operations.
Aisi 4 alloy steel uns g40 thursday, 15 nov, 2012introductionalloy steels are designated by aisi four digit numbers. The steel has good strength and toughness, weldability and machinability. Aisi 4 is a chromium molybdenum alloy steel specification. Typical applications for 4 low alloy steel include. Aisi 4 alloy steel contains chromium and molybdenum as strengthening agents. Most backordered items can be rushed in from the publisher in as little as 24 hours. Properties with values for just one material 1, in this case are not shown. The chemical composition of aisi 4 alloy steel is listed in the following table. The openhearth furnace was the nations major source of steel until 1969, when this role was assumed by the relatively new. It has a good combination of all of the typical traits of steel strength, some ductility, and comparative ease of machining. Aisi sae 4 alloy steel can be made into steel plate, steel sheet, round and flat steel bar, steel pipe and tube, etc. Special steelmaking practices, more rigid inspection techniques, and more restrictive selection are necessary to meet the necessarily rigid quality standards. Aisi 4 steel uns g40, also known as 4 chromoly steel, is a chromemolybdenum series low alloy steel with high strength, toughness and hardenability, usually used in quenched and tempered condition. Calculators forum magazines search members membership login metal alloys.
Six test plates were joined by two types of filler wire with similar chemical composition to the base metal, and with lower carbon content and slightly higher alloy elements content compared to. I put the piece in the furnace at 1600 degrees for 2 hours the oven was preheated, then oil quenched, and anealed at 700 degrees for 1 12 hours. The graph bars on the material properties cards below compare annealed saeaisi 4 to. Astm 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0. European equivalent grade for alloy special steel sae4 aisi, astm, uns.
The 4 alloy steel sheet has been annealed, has an unpolished mill surface, meets sae aerospace material specifications ams 6350 standards, and has a standard tolerance. This information may be useful for machining purposes and as a resource for purchasing 4 and 4140 steel. Known for its responsiveness to mechanical and heat treatments, alloy steel 4 is weldable by most commercially popular methods. It has the lowest strength compared to the other variants of saeaisi 4 steel. Aisi 4140 is a chromium molybdenum alloy steel specification widely used in the oil and gas industry. It has low carbon content, and can be welded easily. Datasheet for steel grades carbon steel astm 4 astm 4 standard. Aisi or sae 4 grade is a lowalloy steel containing chromium and molybdenum as strengthening agents. The standard is also acceptable in the manufacture of piping read more. Aisi 4 used in oil and gas industry and large machinery structural. After the melting process, the molten steel is transferred to a ladle refiner for alloy adjustments and vacuum degassing.
Pdf an analysis of the mechanical behavior of aisi 4. Mechanical properties the mechanical properties tensile strength, yield point, etc. Aisi 4 alloy steel is a medium carbon, low alloy steel in astm a29 standard. They are more responsive to mechanical and heat treatments thancarbon steels. Cold working is possible and forming often takes place in the annealed condition. By performing inert gas stirring under a nearperfect vacuum, impurities and harmful gases are removed. Aisi 4140 alloy steel aisi 4140 steel stockholders and suppliers, delivering to the whole of the uk. It also contains the use of astm 4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. This alloy is used as forgings in the aerospace and oil and gas industries, and has myriad uses in the automotive, agricultural and defense industries, typical uses are forged gears, shafts, and spindles. There are 31 material properties with values for both materials. If it is tubing you are referring to the typical properties i can provide you.
This page cover the astm 4 chemical element, mechanical properties, astm 4 datasheet, cross reference of astm 4 steel, mainly used for. Each plate was nominally 305 mm wide x 610 mm long by 6. It is one of the most used aircraft steels because of 4 s ease of manufacturing and weldability. Smn420 oil and gas industry steel aisi 4 steel is a alloy structural steel belong to astm a29a29m steel grade standard. Ic4 is same as aisi 4030, and ic4140 same as aisi 4140. Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel common variant stylings include chromemoly, cromoly, crmo, crmo, crmoly, and similar. A number in parentheses indicates the year of last reapproval.
Chemical properties the chemical properties of 4 and 4140 steel are similar aside from differences in carbon and manganese concentrations. Grade alloy 4, aisi 4, uns g40 castle metals stocks a wide range of alloy 4 in bar distributed globally from our distribution centers in north america, as well as in the u. It shows good overall combinations of strength, toughness and fatigue strength. Weldability, fabrication, and mild hardenability make it a popular choice in all forms tube, bar, sheet, and plate. If additional abrasion and wear resistance are needed this material can be provided in a nitrided condition. We will first explore the physical properties of 4 steel, followed by its mechanical properties and finally its applications, to show where this steel shines.
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