Jun 08, 2011 · For 4140 steel, the recommended heat treatment  consists of heating to austenitizing temperature, typically 1570°F (855°C), followed by oil quenching. Tempering (reheating after quenching) will achieve the desired hardness range. From available data for an oil quenched, ½-inch-diameter round part, you will need to temper at (approximately 4140 Alloy Steel Bar Manufacturer, Suppliers, Factories 4140, 1.7225, 42CrMo4, SCM440 Alloy Steel Bar 4140 Steel Round Bar:diameter 8mm 3000mm 4140 Steel Plate:thickness 10mm 1500mm x width 200mm 3000mm 4140 Steel Grade Square:20mm 500mm Surface Finish:Black, Rough Machined, Turned or as per given requirements.
Heat Treatment Annealing Heat to 800 oC - 850 C, hold until temperature is uniform throughout the section and cool in furnace. Flame or Induction Hardening 4140 hardened and tempered bar can be further surface hardened by either the flame or induction hardening methods 4140 High Tensile Steel Interlloy Engineering Steels Hardening:Heat to 840 o C - 875 o C, hold until temperature is uniform throughout the section, soak for 10 - 15 minutes per 25 mm section, and quench in oil, water, or polymer as required.*Temper immediately while still hand warm. Nitriding:4140 hardened and tempered bar can also be successfully nitrided, giving a surface hardness of up to Rc 60. 4140 cold drawn quenched and tempered steel bars, 4140 AISI 4140 steel quenched and tempered qt steel round bar pre heat treated 4140 steel. $730.00-$750.00 Heat treatment:Normalization:heating to 840 to 880 &deg; C, maintenance, furnace cooling to 600 &deg; C, then in air. hot rolled quenched alloy steel round bar aisi 5117 quenched and tempered steel bars hot rolled quenched and
Nov 08, 2019 · Mass Effect data on 4142 from EMJ catalog. Chart on page 14 will give some idea of tempering temps. I was told by the metallurgist at the heat treat place that 4140 prehard should be sub annealed before rehardening to a higher hardness. I have made a few chucked keys from 4140 4140HW Alloy Steel Technical DataTimkenSteels 4140HW grade is a fine-grained, low-alloy steel that offers optimum heat-treat response in heavier cross-sections. You find 4140HW in a variety of bar and tubing applications in quenched and tempered conditions. Yield strengths range from 110 ksi through 140 MetalsDepot® - 4140 Alloy Steel Flat Bar4140 Alloy Steel Flat is an cold drawn annealed steel of relatively high hardenability with its chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. 4140 Alloy Steel Flat responds well to heat-treatment and is relatively easy to machine in the annealed condition. 4140 Alloy Steel Flat has good strength and wear resistance
normalizing heat treatment for steel forgings ThermTech is proud to provide normalizing heat treatment for steel forgings. The process is employed on forged products to homogenize the grain structure, enhance machinability, and improve response to subsequent heat-treating processes. Quick:Hardening & tempering 4140? - The Home Shop Dec 24, 2004 · The 4140 will get mid 50s max on the Rockwell "C:scale unless it is run through a carburizing process. Tempering at 400F for and hour or two and let cool in air should bring the hardness down to about 40RC. For light tapping work on body sheet metal it should be alright but I do think that most hammers are made out of a "S" series tool stool. SAE 4140 Alloy Steel SAE 4140 Forging SAE 4140 Flat SAE 4140 alloy steel is usually supplied with ready heat treated to hardness in 18-22 HRC. If further heat treatment is required, then heat to 840 875 , hold until temperature is uniform throughout the section, soak for 10 15 minutes per 25 mm section, and quench in oil, water, or polymer as required.
4140 HT Surface Hardening . 4140 HT is a medium carbon alloy steel heat treated to a . nominal hardness of 28-32 HRC. 4140 HT can also be surface hardened to increase wear resistance . Typical Chemical Composition