AISI/SAE 4340 Alloy Steel- 4340 Steel Properties All ...
4340 is a nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. It has very good fatigue resistance. This alloy, 4340, may 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.
4340 Steel Heat Treatment and Process Stress Relieving. For pre-hardened steel stress relieving is achieved by heating steel 4340 to between 500 to 550°C. Heat to 600 °C – 650 °C, hold until temperature is uniform throughout the section, soak for 1 hour …
AISI 4340 is a heat treatable, low alloy steel containing nickel, chromium, and molybdenum. The inclusion of nickel improves hardenability. Regarded industry-wide for its toughness, 4340 supplies high strength in the heat treated condition while still maintaining excellent fatigue strength over time.
Atlas 4340 is a nominally 1.8 percent Nickel Chromium Molybdenum low alloy steel of high hardenability, with high strength and toughness in relatively large sections achieved with a "quench-and-temper" heat treatment. A contemporary alternative to 4340 is Atlas 6582 through-hardening steel that has improved through-hardening characteristics and
information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. 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. Datasheet for Steel Grades Carbon Steel AISI 4340 AISI 4340 Standard ...
4340 High Tensile Steel Interlloy Engineering Steels ...
Heat Treatment Annealing Heat to 800 o C - 850 o C, hold until temperature is uniform throughout the section and cool in furnace. Flame or Induction Hardening 4340 hardened and tempered bar can be further surface hardened by either the flame or induction hardening methods resulting in a case hardness in excess of Rc 50.
AISI 4340 Steel 36CrNiMo4 1.6511 - Otai Special Steel
AISI 4340 Steel Grade Heat Treatment. For pre-hardened steel stress relieving is achieved by heating steel 4340 to between 500 to 550°C. Heat to 600 °C – 650 °C, hold until temperature is uniform throughout the section, soak for 1 hour per 25 mm section, and cool in still air.
mean carbon content of sae specification, % 46 table 5 - grades of chromium-nickel austenitic steels not hardenable by thermal treatment 46 table 6 - stainless chromium steels 47 table 7 - wrought stainless steels of special machinability 48 normalizing and annealing temperatures of tool steels 49 heat treating of tool steels 51 hardness vs.
Heat treating 4340. You need to ask your heat treater if he can stand them up on end without having them fall etc. Longer shafts it's nice if you can drill & tap shaft end and supply hooks in each shaft on one end so they can be lifted for quench. These are short enough they shouldn't be a problem.
Steel GradeAISI 4340 Chemical information,Mechanical properties Physical properties, Mechanical properties, Heat treatment, and Micro structure This page is mainly introduced the AISI 4340 Datasheet, including chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc.
Alloy E 4340 is a widely used deep-hardening constructional steel. Due to E-4340's high alloy content it obtains a uniformed hardness by heat treatment. The high fatigue strength makes E4340 ideal for highly stress parts as it maintains it's strength and hardness at elevated temperatures.
(PDF) A New Step Heat Treatment for Steel AISI 4340
In this paper a modified up-quenching heat treatment method (Tomita method) for AISI 4340 steel (ultra high strength steel) is proposed. A low alloy steel (0.33%C), was used to study the effect of isothermal austempering and modified up-quenching austempering heat treatment on the mechanical properties.
Heat Treatment 4340 Steel . Hi, I am an undergraduate engineer, and I'm doing a Thesis on Heat Treatment of 4340 steel. I was wondering if you could point me in the right direction. I am looking for research papers and research material for the heat treating process for 4340. I have the SAE Aerospace Material Specs , but I'm looking for a bit ...
the initial microstructure of AISI 4340 on hardness profile behavior treated by CO2 laser; they mentioned that the hardness curve can be generally divided into four regions, such as the hardened zone, the over-tempered zone in which the partial transformation occurred and the heat-unaffected base metal.
SAE AISI 4140 Steel Properties, Material Heat Treatment ...
AISI SAE 4140 alloy steel can be made into round steel bar, flat & square steel bar, steel plate, steel tube, and has many uses in the aerospace, oil and gas and automotive industries, typical uses are thin-walled pressure vessels, forged gears and shafts (Motor shafts, pump shafts, hydraulic shafts, etc.), spindles (lathe spindles, milling spindles, etc.), collars, clamps, high strength bolts, valve bonnet, …
4340 Heat Treating - Material engineering general ...
Mar 04, 2008 · RE 4340 Heat Treating Maui (Materials) 24 Aug 07 16:58 You should be cutting samples from the bar stock at mid-radius after heat treatment is completed in order to make your Charpy impact specimens, not loading pre-made Charpy blanks alongside the bar stock inside the heat treat furnace.
AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.
The heat treating information shown represents typical procedures and hardnesses for many applications. Other procedures and hardnesses may be available. See individual data sections for more specific information.
Steel GradeSAE 4340 Chemical information,Mechanical properties Physical properties, Mechanical properties, Heat treatment, and Micro structure This page is mainly introduced the SAE 4340 Datasheet, including chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc.
Make Sure Your Specified Heat Treatment is Achievable B
4340 3.0 The commercially accepted range ... Make Sure Your Specified Heat Treatment is Achievable Carbon content, Rockwell hardness for percent martensite ... Heat Treating Temperatures recommended by SAE *Normalize 1700°F Austenitize 1700°F *For forged or rolled specimens only
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2.Size:1000*2000mm / 1220*2440mm / 1250*2500mm / 1500*3000mm
3.Packaging Details:Standard export seaworthy packing or as required.
4.Application: construction decoration and industry instruments