ASTM A290

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We are professional ASTM A290 /A290M A 290 Type G Class 1 Class G Class D Grade 1 Clasd A Class B Grade 2 Class C Grade 3 Class E Class F Grade 4 Class G Class H Class I Class J Class K Class L Grade 5 Grade 6 Class M Class P Class T Forged Forging Steel Reduction Reducer Gears Planet Gear pinio gears ring gears Input Idle Shaft Spline Splined Pinion Shaft Gear Shaft Bull Gear Bull Gear Rim gear wheels,ASTM A290 /A290M A 290 Type G Class 1 Class G Class D Grade 1 Clasd A Class B Grade 2 Class C Grade 3 Class E Class F Grade 4 Class G Class H Class I Class J Class K Class L Grade 5 Grade 6 Class M Class P Class T Forged forging Steel Round Bars Rods Square rectangular rectangle Flat Hex Bars,ASTM A290 /A290M A 290 Type G Class 1 Class G Class D Grade 1 Clasd A Class B Grade 2 Class C Grade 3 Class E Class F Grade 4 Class G Class H Class I Class J Class K Class L Grade 5 Grade 6 Class M Class P Class T Forged Forging Steel Hollow Bars Forged Forging Sleeves Bushes Bushing Pipes Piping tube tubings barrels Casing Cases Shells cylinders hubs housings,ASTM A290 /A290M A 290 Type G Class 1 Class G Class D Grade 1 Clasd A Class B Grade 2 Class C Grade 3 Class E Class F Grade 4 Class G Class H Class I Class J Class K Class L Grade 5 Grade 6 Class M Class P Class T Forged Forging Steel Rings Seamless Rolled Rings,ASTM A290 /A290M A 290 Type G Class 1 Class G Class D Grade 1 Clasd A Class B Grade 2 Class C Grade 3 Class E Class F Grade 4 Class G Class H Class I Class J Class K Class L Grade 5 Grade 6 Class M Class P Class T Forged Forging Steel Blocks Discs Disks Plates,ASTM A290 /A290M A 290 Type G Class 1 Class G Class D Grade 1 Clasd A Class B Grade 2 Class C Grade 3 Class E Class F Grade 4 Class G Class H Class I Class J Class K Class L Grade 5 Grade 6 Class M Class P Class T forged forging parts Forged Products forged forging pieces forged forging steel components materials Forged products from china

ASTM A290 / A290M

Abstract

This specification deals with normalized and tempered, and quenched and tempered, carbon and alloy steel forged or rolled rings for reduction gears. The grades and classes of steels covered here are: Grade 1, Classes A and B, and Grade 2, Classes C and D, which are carbon steels; and Grade 3, Classes E and F, Grade 4, Classes G, H, I, J, K and L, Grade 5, Classes M and P, and Grade 6, Class T, which are alloy steels. Materials shall be manufactured by melting and forging processes and optional machining, and shall be allowed to cool prior to reheating. Heat treatment shall consist of normalizing and tempering for Grade 1, Classes A and B, and quenching and tempering for all other grades and classes. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, copper, and aluminum. Steels shall also undergo tension, impact, and Brinell hardness tests, and shall conform to the following mechanical requirements: tensile strength, yield strength, elongation, reduction of area, Brinell hardness, and Charpy V-notch.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers normalized and tempered, and quenched and tempered, carbon and alloy steel forged or rolled rings for reduction gears.

1.2 Several grades and classes of steel are covered as follows:

1.2.1 Grade 1, Classes A and B, and Grade 2, Classes C and D, are carbon steel.

1.2.2 Grade 3, Classes E and F, Grade 4, Classes G, H, I, J, K and L, Grade 5, Classes M and P, and Grade 6, Class T, are alloy steel.

1.2.3 All grades and classes are considered weldable under proper conditions. Welding techniques are of fundamental importance and it is pre-supposed that welding procedure and inspection will be in accordance with proper methods for the class of material used.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining