4340 High Tensile Steel. 4340 is a 1.8% nickel - chromium - molybdenum high hardenability high tensile steel - generally supplied hardened and tempered in the tensile range of 930 - 1080 Mpa (condition U) - (Rc 28 - 36).. Characterised by high strength and toughness in relatively large sections. Pre hardened and tempered 4340 can be further AISI 4340 Fasteners Alloy Steel AISI 4340 Bolts, AISI Alloy steel 4340 fasteners is a chromium-molybdenum alloy steel with high strength properties, used for manufacturing a wide range of fasteners across ASTM and ISO bolting standards. Our offered range of supply AISI 4340 Steel Fasteners has some great features to offer such as Compact design, Superior quality, longer service life and more.
treatment, and Micro structure, etc. It also contains the use of SAE 4340,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. Datasheet for Steel Grades Carbon Steel SAE 4340 SAE 4340 Standard Number:ITEM Standard Number Descriptions SAE 4340 Chemical composition(mass fraction)(wt.%) Evaluation of machined surface of the hardened AISI 4340 Feb 19, 2020 · The development of new cutting tool materials favors the hardened steel turning process, which has in some cases replaced the grinding process. Thus, this study evaluates the machined surface of hardened AISI 4340 steel via turning and grinding operations. The turning process evaluated the effects of the cutting tools (material, grade, and coating) and the process parameters (cutting speed IJIRAE::Optimization of Cutting Parameters in Hard Turning The dry turning experiments were performed on hardened AISI 4340 steel material using ceramic wiper tool .AISI 4340 steel having hardness:48 (4852) HRC was used. Keywords Hard turning, surface roughness, taguchis method. I. INTRODUCTION Hard turning attracts great interests since it potentially provides an alternative to conventional grinding process for machining high hardness, high precision
a Abbreviations designate:HR, hot rolled; CD, cold drawn; A, annealed; N, normalized; Q and T, quenched and tempered; and HB Brinell hardness number.. Speeds for turning based on a feed rate of 0.012 inch per revolution and a depth of cut of 0.125 inch. Recommended Cutting Speeds in Feet per Minute for Turning, Milling, Drilling, and Reaming Ferrous Cast Metals Study of Chip Formation in Hard Turning of AISI 4340 Alloy Mar 10, 2015 · Turning of AISI 4340 steel. Cutting Force. L.G.Lima et.al., (2005) studied the machinability of hardened AISI 4340 of different hardness values ; 42 HRC and 50 HRC with using coated carbide and PCBN tools. It is observed that the machining forces were reduced as cutting speed was. increased and increase with feed rate and depth of cut.Effect of cutting conditions on surface roughness and turning the AISI 4340 steel, hardness 60 HRC with CBN insert. Water-based lubricant used as a wet lubricant and boric acid in powder form is used as a solid lubricant. The objective of this study is to know about optimum machining parameters and best conditions with dry or solid lubricants for