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SAE AMS 6474A Document Information:
Title
Forgings, Hardenable Steels and Corrosion-Resistant Steels Heat-Treated, Finished-Part Properties Short-Transverse Tensile Strength and Fracture Toughness
SAE International
Publication Date:
Feb 1, 2008
Scope:
Form
This specification establishes requirements for steel forgings
of any shape or form that finished parts are to be made (See 8.4,
8.5, 8.8.4 and 8.10).
Application
Forgings are typically intended to be manufactured from
consumable electrode vacuum remelted steel for use in those high
performance parts where control of short transverse tensile
properties or fracture toughness is important.
The forgings are to be manufactured in accordance with a
documented process; product approval is based on first article
demonstrations of tensile properties (short transverse if section
size allows) and of fracture toughness, in the section size of the
finished part.
Certain design and processing procedures may cause some of these
products to become susceptible to stress corrosion cracking after
heat treatment; ARP1110 recommends practices to minimize such
conditions.
Classification
Forgings shall be of the following grades as specified in the
ordering data (See 8.10). When grade is not specified, Grade A
shall apply.
Grade A
Acceptance tests include verification of room temperature
tensile properties and, when specified, of room temperature
fracture toughness. Preproduction testing includes verification of
all requirements; product approval is in accordance with
AMS2376.
Grade B
Acceptance tests do not include verification of mechanical
properties. Preproduction testing includes verification of all
requirements; purchaser must approve the supplier's process control
documentation and the product prior to acceptance of production
forgings.
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