1. Scope
1.1 This specification covers alloy steel bars, suitable for surface hardening by nitriding, designated as Classes A, B, C, and D. Class A and Class D bars are general-purpose bars; Class B bars are free-machining bars; Class C bars contain 3.50% nickel and are characterized by higher core strength. All classes are normally furnished in the hot-rolled, quenched, and tempered condition. However, centerless-ground or turned bars, in any of the classes, may be specified by the purchaser. Also, as-rolled, annealed, or unannealed bars suitable for forging may be purchased to this specification. When as-rolled, annealed, or unannealed bars are furnished, Sections 7, 11, and 12 are not applicable.
1.2 The values stated in inch-pound units are to be regarded as the standard.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
Keywords
alloy steel bars; nitriding steel; steel bars; Alloy steel bars--specifications; Free-machining steel--specifications; Nitriding; Surface hardening/hardness
ICS Code
ICS Number Code 77.140.60 (Steel bars and rods)
DOI: 10.1520/A0355-89R00
ASTM International is a member of CrossRef.
Citing ASTM Standards
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