Eglin Steel (ES-1) is a high-strength, high-performance, low-alloy, low-cost steel, developed for new generation of bunker buster type bombs, eg. the Massive Ordnance Penetrator and the improved version of the GBU-28 bomb known as EGBU-28. It was developed in collaboration between the US Air Force and the Ellwood National Forge Company. It has been suggested that Tensile strength be merged into this article or section. ... The old steel cable of a colliery winding tower Steel is a metal alloy whose major component is iron, with carbon content between 0. ... A bunker buster bomb is designed to penetrate hardened targets or targets buried deep underground. ... The Massive Ordnance Penetrator (MOP) project is a proposal by the US Air Force to develop a massive, precision-guided, 30,000lb (13,608kg) bunker buster bomb. ... Categories: Air-dropped bombs ... Seal of the Air Force. ...

The development of Eglin Steel was commissioned in order to find a low-cost replacement for strong and tough but expensive AF-1410, Aermet-100, HY-180, and HP9-4-20/30 steels. Such high-performance material is required so the weapon survives the high impact speeds required for deep penetration. The material has a wide range of other applications, from missile parts and tank bodies to machine parts. Unlike some other high-performance alloys, Eglin Steel can be welded easily, further broadening the range of its applications. A missile (CE pronunciation: ; AmE: ) is, in general, a projectile—that is, something thrown or otherwise propelled. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...

The composition of the material involves chromium, tungsten, and low to medium amount of carbon, which contribute to the material's strength and hardness, nickel (in a relatively low amount) and silicon which help with toughness, and vanadium and tungsten carbide particles which contribute additional hardness and high-temperature strength. General Name, Symbol, Number chromium, Cr, 24 Chemical series transition metals Group, Period, Block 6, 4, d Appearance silvery metallic Atomic mass 51. ... General Name, Symbol, Number tungsten, W, 74 Chemical series transition metals Group, Period, Block 6, 6, d Appearance grayish white, lustrous Atomic mass 183. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic Atomic mass 58. ... General Name, Symbol, Number silicon, Si, 14 Chemical series metalloids Group, Period, Block 14, 3, p Appearance dark gray, bluish tinge Atomic mass 28. ... In materials science and metallurgy, toughness is the resistance to fracture of a material when stressed. ... General Name, Symbol, Number vanadium, V, 23 Chemical series transition metals Group, Period, Block 5, 4, d Appearance gray-white metal Atomic mass 50. ... Tungsten carbide, WC or W2C, is a chemical compound containing tungsten and carbon, similar to titanium carbide. ...

The material composition is: [1]

• Iron (remaining balance to 100%)
• Carbon (0.16-0.35%)
• Manganese (0.85%)
• Silicon (max. 1.25%), stabilizes the austenite phase, enhances toughness
• Chromium (max. 1.50-3.25%), enhances strength and hardenability
• Molybdenum (max. 0.55%), enhances hardenability
• Nickel (5.00%), increases toughness
• Tungsten (0.70-3.25%), enhances strength and wear resistance
• Vanadium (0.05-0.3%), increases toughness
• Copper (0.50%)
• Phosphorus (impurity, max. 0.015%)
• Sulfur (impurity, max. 0.012%)
• Calcium (max. 0.02%), sulfur control agent
• Nitrogen (impurity, max. 0.14%)
• Aluminium (max. 0.05%)

The material has to undergo heat treatment involving quenching, in order to develop the required austenitic microstructure, with subsequent tempering. General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ... General Name, Symbol, Number manganese, Mn, 25 Chemical series transition metals Group, Period, Block 7, 4, d Appearance silvery metallic Atomic mass 54. ... General Name, Symbol, Number silicon, Si, 14 Chemical series metalloids Group, Period, Block 14, 3, p Appearance dark gray, bluish tinge Atomic mass 28. ... Iron-carbon phase diagram, showing the conditions under which austenite (γ) is stable in carbon steel. ... General Name, Symbol, Number chromium, Cr, 24 Chemical series transition metals Group, Period, Block 6, 4, d Appearance silvery metallic Atomic mass 51. ... General Name, Symbol, Number molybdenum, Mo, 42 Chemical series transition metals Group, Period, Block 6, 5, d Appearance gray metallic Atomic mass 95. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic Atomic mass 58. ... General Name, Symbol, Number tungsten, W, 74 Chemical series transition metals Group, Period, Block 6, 6, d Appearance grayish white, lustrous Atomic mass 183. ... In materials science, wear is the erosion of material from a solid surface by the action of another solid. ... General Name, Symbol, Number vanadium, V, 23 Chemical series transition metals Group, Period, Block 5, 4, d Appearance gray-white metal Atomic mass 50. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance metallic pinkish red Atomic mass 63. ... This article is about the chemical element. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Atomic mass 32. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless Atomic mass 14. ... General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ... Heat Treatment is a group of manufacturing techniques used to alter the hardness and toughness of a material. ... Quenching is a general term for non-radiative de-excitation. ... Iron-carbon phase diagram, showing the conditions under which austenite (γ) is stable in carbon steel. ... Al-Si microstructure at 40x magnification Microstructure refers of the microscopic description of the individual constituents of a material. ... Tempering is a heat treatment technique for metals and alloys. ...

See also

• Eglin Air Force Base

Eglin Air Force Base is a base of the United States Air Force that belongs to the Air Force Materiel Command; the Air Armament Center is the host unit. ...

External links

• AFRL Horizons - Eglin Steel
• Globalsecurity.org - EGBU-28