AN6204L
REQUIREMENTS:
Materials:
Steel alloy 4140 in accordance with SAE-AMS6349 or SAE-AMS6382.
Corrosion resistant steel (CRES) in accordance with one of the following:
321 CRES in accordance with SAE-AMS5645.
15-5 PH CRES (UNS 15500) in accordance with SAE-AMS5862, SAE-AMS5659,
or ASTM A693.
Age hardening CRES in accordance with ASTM A705/A705M
Heat treat to 155,000 psi (1069 MPa) tensile strength.
Finish: See table I.
TABLE I. Material and plating designators.
Material and
Material alloy and plating finish
plating designator
Steel alloy 4140 with cadmium finish in accordance with SAE-AMS-QQ-P-416, type
A
II, class 2, dyed black.
B
CRES no finish.
R
Steel alloy 4140 with zinc plate in accordance with ASTM B633; type VI, Fe/Zn 5.
Finish. Finishes shall be as specified in table I. All plating's shall be capable of meeting a minimum
of 96 hours salt spray test in accordance with ASTM B117. The valve shall show no evidence of
corrosion after 96 hours of salt spray. Fluid passages, other openings, and internal threads shall not
be subject to the plating thickness requirement and may have bare areas provided they are protected
with a light film of oil.
OPERATING CHARACTERISTICS
The valve shall be able to function at operating pressure at 3,000 PSI and shall withstand and seal
2,250 psi (16 Mpa) minimum pressure.
Part or Identifying Number (PIN):
AN
6204
-1
A
Material plating designator,
see table I
Dash number from figure 1
Basic specification number
AN prefix
PIN example: AN6204-1A is for a hydraulic bleeder valve steel alloy 4140 with cadmium finish for a
.3750-24UNF-2A taped hole.
3
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