AISI 4340 steel is an ultra-high strength medium carbon low alloy steel, material properties, heat treatment, equivalent, hardness chart, density, machinability

4340 VAR AMS 6414 is a low alloy Chromium-Nickel-Molybdenum steel capable of being heat treated to high strength levels. This specification is for a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing,

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

Heat Treating Steels Temperature and Quenching Medium Table. Notes: (a) Draw at 1,150 °F for tensile strength of 70,000 psi. (b) For spring temper draw at 800–900 °F. Rockwell hardness C-40–45. (c) Bars or forgings may be quenched in water from 1,500–1,600 °F.

LESCALLOY 4340 VAC-ARC steel is a low alloy, nickel-chromium-molybdenum steel capable of being heat treated to high strength levels. The alloy has a good combination of ductility, toughness and strength along with high hardenability.

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.

2021年9月10日 · Grade 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.

Straightening: Best done warm 400-800F (205-425C). Hardening: (Atmosphere or Vacuum Furnace). Preheat: 1200-1250 (650-675C), equalize. High Heat: 1475-1500F (800-815C), soak 10 to 30 minutes. For vacuum hardening, use the high side of the high heat range and soak times. Quench: Oil quench to hand warm, 150F (65C). Temper immediately.

This page is mainly introduced the AISI 4340 Datasheet, including chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc.

Download scientific diagram | Heat Treatment Chart. from publication: The Influence of Intercritical Annealing Holding Time on Mechanical Properties of AISI 4340 Steel |...