ASTM A829 PDF

This standard is not included in any packages. Heat analysis shall be astn wherein steel specimens shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, and copper. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. This abstract is a brief summary of the referenced standard.

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Alloy is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. Typical applications for alloy steel are for structural use, such as aircraft landing gear, power transmission gears and shafts and other structural parts.

The carbon content is nominally 0. The alloy can be hardened by heat treatment. Typical applications for low alloy steel include structural use such as aircraft engine mounts and welded tubing applications. Its chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. C responds well to heat-treatment and is comparatively easily machined in the heat-treated condition. With a combination of such highly desirable properties as good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures.

Typical applications for alloy steel include shafts, gears, bolts, couplings, spindles, tool holders, sprockets, hydraulic machinery shafts, oil industry drill collars,Kelly bars, tools joints. Very good shock resistance and toughness are also key properties of this alloy in the heat treated condition. Alloy Commonly employed in heavily stressed machinery parts including shafts, gears, pinions and also in hand tool components.

The nickel imparts good toughness and ductility. The chromium and molybdenum contribute increased hardness penetration and wear, that may be carburized. The well balanced alloy content permits hardening to produce a hard wear resistant case combined with a core strength in the order of , PSI. It has excellent machinability and responds well to polishing applications.. With the balanced analysis, this steel provides, uniform case depth, hardness and wear properties, and gives the advantage of low distortion.

Typical applications for alloy are caburized splined shafts, piston pins, cam shafts, guide pins, bushings, automotive differential pinions and transmissions, arbors, bearings, sleeves king pins, carburized gears, general engineering purposes.

It is composed of in weight percentage 0. It is often used for carburized case hardened parts. It has a high hardenability, high core hardness and high fatigue strength, all of which make it ideally suited for critical aircraft engine gears.

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ASTM A829 Steel Grades

More A Plate specimens addressed under this specification are available in four treatment conditions as rolled or hot rolled; annealed; normalized; and normalized and tempered , three structural forms rectangular; circular and semi-circular; and sketch, including rings , five edge categories mill edge; universal mill edge; sheared edge; gas cut edge; and special cut edge , and seven finishes as rolled or hot rolled; blast cleaned; blast cleaned and oiled; pickled; pickled and oiled; painted with one prime coat; and painted with one prime coat and one finish coat. Steel materials shall be manufactured and furnished in defined procedures unless specified otherwise in the purchase order. Heat analysis shall be performed wherein steel specimens shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, and copper. Specimens shall also undergo tensile tests and shall conform to required values of tensile strength.

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ASTM A829 – Grade 4140/4142

Alloy is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength. Typical applications for alloy steel are for structural use, such as aircraft landing gear, power transmission gears and shafts and other structural parts. The carbon content is nominally 0. The alloy can be hardened by heat treatment. Typical applications for low alloy steel include structural use such as aircraft engine mounts and welded tubing applications. Its chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength.

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