Downloaded from http://www.everyspec.com
F’ED.STD. .NO.66D
-h
8, 1979
SUPEXSEDRfG
Fed. Std. NO. 66C
~pfi 18, 1967
mm
S’TEEI#
~c.cu
STANDM?D
coMPosrrxoN
AND
EMaDlmmxum
This Sbnd&rd was appmd
by tbe commissioner,
Federalsupply service, General Stices MmlnMsa-
tioll, fortbeuse
ofdl~edm=l~.
(GSA) ,
fromthe GeneralStmrices.~
tie Superhtendent d Mcuxnent. A CWY far biddbg
and cmk’ac-~g
ycyoses ‘is
mailable5orn GSA hsiness Serrice Canters.
Copies ar= fursale attbe GSA, Speci?hsdcnzs& Consuma
hif~
mstsbu+a
Brszxiz. 13Mg . 197 fi~=ae
N-Y y-) t ~*@ox s Dc
20407.
7his cbcument
is available
acting
as an age~tb
?5C 95G?
“
Downloaded from http://www.everyspec.com
FEDERAL
STEEL:
CiiEMICfi
STANDARD
COMPOSITION
AND HARDENABILITY
S 1. This Federal standard is issued in loose leafform to permit the
insertionor removal of new or revised
pages.
,S2. All users of Federal standards should keep them up to date by inserting
revised or new pages as issued and removing superseded and cancel.led
pages.
S3. New and revised pages willbe issued under change noticeswhich wiIl
be numbered consecutivelyand willbear the date of issuance. Change notices
should be retainedand filedin frontof the standard untilsuch time as they
are superseded by a reissue of the entirestandard.
S4. changes. When a Federal agency considers thatthisstandard does not
provide foritsessen “-ial
needs, written request for changing or adding to the
standard, supported by adequate justification,
shallbe sent to the Administration. This justilcatk.nshallexplain wherein the standard does not provide
for essentialneeds. The request shallbe sent in duplicateto the General
Services Administration,Federal Supply Service, Washington, DC 20406.
The Administrationwilldetermine the appropriate actionto be tdsen end will
notifythe agency.
S5. Confiictwith referenced specifications.Where the requirements
statedin thisstandard conflictwith any requirement in a referenced specification,the requirements of *e st~d=d
sha~ aPPIY Na@re of conflict between the standard and the referenced specification
shallbe submitted in
duplicateto the General Services Administration,Federal Supply Service,
Washington, DC 20406.
●
(Activities
outside the Federal Government may obtaincopies of Federtil
SpecKlcations,Standards, and Handbooks as outlinedunder General Information
in the Index of Federal Specifications
and Standards and at the prices indkated in the Index. The Xndex, which includes cumulative monthly supplements
as issued, is for saleon a subscriptionbasis by the Superintendent of
Documents, U.S. Government PrintingOffice,Washington, DC 20402.
(Sinclecopies of this spectilcation
and other Federal specifications
required by activities
outside the Federal Government
for bidding purposes
1
“
Downloaded from http://www.everyspec.com
Fed.
Std. No. 66D
are availablewithout charge from Business Service Centers at the
General Services A dmnistration
“
Regional Officesin Boston, New York,
Philadelphia,Washington, DC, Atlanta,Chicago, Kansas City, MO,
Fort Worth, Houston, Denver, San Francisco, Los Angeles, and
Seattle,WA.
(FederalGovernment activities
may obtaincopies of Federal
Specifications,
Standards, end Handbooks and the Index of Federal
Specifications
and Standards from establisheddistributionpoints
in theiragencies.)
Downloaded from http://www.everyspec.com
Fed. Std.
No. 66D
corns
Paragraph
1
2
I%ge
WOE.
*.00******
. *..**.****
●
**=**..**=
●
***0****=
●
****.=***
CLU3SIFICATION AND DESIGNATION OF STEELS BY CHEMICAL
C(B4EWITION....0..0.......*.**.*.....................00*...C*
2.1 Classifi=tion ....................o.........000000o00obo
2.2 standardsteels.,........0 ***...*....*...*..**. .9..***
2.3 Former standard s~els ..............................=ce.
2.4 Nonstandard steels......................................
2.5 H-steels.,.. . .. . . . . . . . . . . . . . . . . . . .* .*.*
. . . . . . . . ..*...
●
●
3
4
...
●
●
●
..... .. ........ .,* **
VERIFICATIONOF CHEMICAL(IMPOSITION
●
●
●
●
●
3.1
3.2
Ninitions
Sampling
3.3
Reporting
3.4 ~liu
4
:
7
.............................................
for cast or heat aMlySiS...
= . . . . . . . . . . . ...=...
cast or heat analysis
. . . . . . . ..-. =...-...=
.~.==
for product analysis................go=w=geae.=
3.5
‘folemnces
for product
malysis
. . . . . . . . . ..=.=. ”.-”” W=OOC
CARBONSTEEL COMPOSITIONS . .................. ...........
4.1 ascription .............................................
S12iINLESSAND HEAT-RISISTING STEEL CCMFQSITIONS..............
ALLOY STEEL CCMFOSITIONS .... ............*..0...... . . 00.
● ●
●
.
.
●
●
s’f4NDA.RD
H-STEELS
..
.0
7.1
7.2
Identification
Hardenability
.
.
.
●
●
●
●
.
.
.
●
. .
.
.
.
.
.
.
.
.
.*...*
.
.
.
.
●
. . . . . . . . . O*..
. . . . .0. , . . . .** .
bands . . . . 0 . . . . .
. . . . . .0 . .*
●
●
●
● ●
●
3
●
● ●
●
●
●
.
●
●
●
●
●
.
●
●
O.
●
●
●
00
. . . .0..0
..... *
● ●
4
4
4
4
5
5
5
5
6
6
6
6
6
7
10
10
11
11
U
—
Downloaded from http://www.everyspec.com
Fed.”Std. No. 66D
FEDERAL STANDARD
STEEL:
10
CHEMICAL COMPOSITION AND NARDENABILITY
SCOPE
This standard,
as referenced in the applicable product specifications in
procurement documents, contains:
(a) A catalog of the standard carbon steels, alloy steels (including
E-steels), and stainless and heat-resisting steels that are designated by
chemical composition, or (for H-steels) by chemical composition and hardenability limits by reference to standard industry documents.
(b) Rules for designating the chemical content of carbon steels, alloy
steels, end stainless and heat-resisting steels that ● re not classified as
standard.
2.
CLASSIFICATION AND DESIGNATION OF STEELSBY ~ICAL
COMPOSITION
2.1 Classification. Chemical composition indicates only one aspect of a
steel product and is not to be considered as a complete guide to quality and
performance. Chemical composition, however, is the most consnonbasis for the
classification and designation of steels. The precise chemical content,
together with the desifed form (bar, sheet, strip, plate, etc.) and the size
(primarily cross-sectional area or diameter, will determine whether a given
product can be obtained simply by ordering a standard steel, or whether all
the requirements must be specified in detail.
2.2 Standard steels. Standard steels have specified compositions and are
limited to particular forms and sizes. These steels have individual numerical
designations assigned by industry to facilitate ordering, as sham in table 1.
The numbers are for identification and are not indicative of quality. The
steel numbers wed in this standard are generally Unified Numbering System
(UNS) numbers; corresponding American Iron and Steel Institute (AISI) numbers
and Society of Automotive Engineers (SAE) numbers are included for further
information.
In general, standard steels are used more often and are more readily available than other compositions.
2.3 Former standard steels. These steels were formerly listed as “standard
steels” in previous
editions of
this standard and the AISI manuals but,
because of decreased usage,
they
hve
been
placed in separate tables in the
referenced documents.
4
Downloaded from http://www.everyspec.com
Fed. Std. No. 66D
2.4 Nonstandard steels. Nonstandard steels are steels which do not fall
into the category of standard steels because of differences In their composition. These unlisted steels must be ordered by specifying the chemical
content in accordance with established ranges and limits.
2.5 H-steels. A number of alloy steels, identified by the prefix or
suffix letter “H” to the steel number, may be designated by a combination of
hardenability and composition. The hardenability data compiled for each of
these steels, have been derived from extensive standard (Jominy) endquench
hardenabllity testing, and have been incorporated into composite graphs.
Each graph has two curves, plotted from the maximum and minimum hardness
values reported for l/l&inch distances from the quenched end of a standard
one-inch df,~ter specimen. The band created by these two curves defines the
hardness limits for that composition. Hardenability bands and directions for
their use i.nspecifying E-steels are explained
in ‘7.2.
2.5.1 Chemical composition limits. The chemical composition limits of the
H-steels have been modified so~what from the ranges or limits applicable to
the same grades when specified by chemical composition only so that steel
producers will be able to meet a common standard of hardenability limits.
The modifications permit adjustments in manufacturing range of chemical
composition to correct for individual plant meltlng characteristics which
might othetise influence the levels and widths of the hardenability bands.
The modifications are not great enough to influence the general characteristics of the original compositions of the series under consideration.
3. VERIFICATIONOF CHR41CAL COMPOSITION
3.1 Definitions.
3.11 Cast or heat analysis. Cast or heat analysis is the determination
of the chemical composition of a melt, blow, or heat of steel as represented
by samples obtained from the first part or middle part of the heat during
pouring of the steel from a ladle. This analysis is representative of the
product of a heat of steel as delivered and as reported to the purchaser.
3.1.2 Product analysis. Product analysis is a chemical analysis of steel
in the semifinished or finished product form. The steel can be subjected to
product analysis by the purchaser either for the purpose of verifying that the
chemical composition is within specified limits for each element, includlng
applicable tolerance for product analysis, or to determ.lnevariation in
composition within a heat or lot; it is not used to confirm previous results.
The results of analyses representing different locations in the same piece or
taken from different pieces of a heat or lot may differ, within permissible
limits, from each other and from the cast or heat analysis.
5
——._.——..
Downloaded from http://www.everyspec.com
Fed. Std. No. 66D
3.1.3
A ‘melt?~of steel
is
the
metallic
output
of one charge
of an electric
furnace.
3.1.4 A “heat” is the metallic output of one furnace charge in the open
hearth or the basic oxygen process.
3.1.4 A “blow” is the metallic output of one furnace charge in the bessemer
process.
3*2 ~.
u~ess otherwise Specified in
the contract or order, sampling procedures for cast or heat analysis
will be
in accordance with stand~
industry
practice.
Usually,
at least
three
samples are taken representing
the first,
middle,
and last portions
of the
heat.
Drillings
taken from the first
sqle
or middle samplqare
used in
determining
cast or heat unalysls. fie””adtition~ samples are used for
stu%ey of unifomity and for control purposes.
~
cast 0r heat -siq.
The chemical
composition
specified
~
3.3
for cast or heat analysis
is shown by percentages
of the elements,
erpressed
as minimum or maximum limits
or as ranges.
With the exception
of phosphorus
and sulfur,
all elements
are reported
to two decimals.
~osphorus
and sulfur,
up to 0.060 percent inclusive, are usually reported to three decimals; above
0.060 percent they are usually reported to two decimals. Values are ~rmally
rounded off to the nearest hundredth percent.
.
in~ for DrOdU ct analvs~ . In sampling for product analysis,
3.4
each heat of steel in a lot is considered separately unless otherwise specified. The nwiber of samples selected for analysis is usually indicated by
the applicable product specification. Because of segregation, the location
at which samples for product analysis are obtained is important. Product
analysis must be performed on steel in the condition received from the pducer because steel subjected to subsequent heating operations may not yield
a-~lytical results that correctly represent the original composition. The de.
tafied procedures for obtaining product analysis chips or drillings (samples)
for various forms and sizes of the product are shown in table 2.
Individual determinations may vary
formodu ct ~
3.5 ~ces
from the specified limits or ranges to the extent shown in the applicable
product analysis tables, but the several determinations of any element in a
heat may not va~ both ,aboveand below the specified range.
●
&cause of a characteristic
lack of uniformity,
no product
analysis
is
ordinarily
required for carbon, phosphorus, ad sulfur in rimmed or capped
steels, nor for phosphorus and sulfur in rephosphorized or resulphurized
steels, unless misapplication (error in identification) is clearly indicated.
4.
CAREON STEEL COMFUSITIONS
6
Downloaded from http://www.everyspec.com
Fed. Std. No. 66D
4.1 Description. The chemical composition, ranges and limits, and
product analysis tolerances for carbon steels are covered in tables contained
in the Steel Products Manual published by the American Iron and Steel Institute (AISI). The applicable sections of the Manual,”coverf.ngthe available
forms, are as follows:
(a)
Carbon
Steel
Strip
(b)
Carbon Sheet Steel (Coils and Cut Lengths)
(c) Wire and Rods, Carbon Steel
(d) Carbon Steel: Plates; Structural Shapes; Rolled Floor Plates;
Steel Sheet Piling
(e) Carbon Steel: Semifinished for Forging; Hot Rolled and Cold Finished
Bars; Hot Rolled Deformed Concrete Reinforcing Bars
(f) Steel Specialty Tubular Products
4.1.1 Bars, semifinished products, wire rods, wire, and seamless tubin~.
Standard carbon steels are available as bars, and as semifinished products
(blooms, billets , and slabs) for forging. Standard carbon steels are also
available as wire rods, wire, and seamless tubing. In addition, a small
number of carbon steels have been developed exclusively for both seamless
and welded tubing.
4.1.2 Plates, sheet, strip, structural shapes, and welded tubing. Chemical
composition for carbon steel plates, sheet, strip, structural shapes, and
welded tubfng are ordered by one of two methods:
(a) The steel may be designated as one of the standard SAEnonresulphurized carbon steels developed exclusively for these forms.
(b) The chemical content may be ordered in accordance with applicable
lb
AIS1 ranges and limlts.
The standard SAE nonresulphurized carbon steels for plates, sheet, strip,
shapes, and welded tubing are identified by the same four-digit numbers used
to identify the standard AISI-SAE steels for bars, semifinished products,
wire rods, wire, and seamless tubing. However, comparable compositions from
both groups are not identical despite identification numbers; they differ in
the range of content shown for particular elements (usually carbon). Therefore, in ordering, specify the identification number, the form desired
(sheet, strip, etc.), and the prefix designation “WE”.
7
Downloaded from http://www.everyspec.com
SeriBo dcalsratioa
I
-=9*
chMflaAtioo
NSI
m
Wpte Ololx
Ololp to Gm220, iotl.
tir 010220to U0410, 1081.
Oru Omlo
GMao to GM520, Ird.
up to lalj
lolj w 1022, id.
Owr 10?2 w MU,
Omr 10U
MS
up to 10U
10I3 ta lIE, *1.
inal. or.? 1022to Ku,
1524ta 1552,IOd.
Ove lql
1524w 1552,iosl.
.
—
—
lbl
la
llx
llxx
m
3*
s=-
l--
lliukd-mlyMmum
L
4*
47X
S6xx
GS6xu
WmIa
CMxxa
—
—
Oe&l
9mY
9axa
G@xxx
GwSx=
@n
41k
50U
(turiw)
ikditm
(baring)
IIigb
(bearing)
Iau
521xa
dlaa
M-nrmdllw
slliooo-DngmsBo
Stainhm
ad
bmt-r+
dsting
●tih
F
@xx
4UU
9*
G5@xa * WkX,
1*1.
—
Atuteaitle (rlrIabmfio!wbio
)
alrOEi-nlckel-
mnpwm
mmmi-nickel
s4xx#e?taia
dwigmtiom
92X.X
Xr.Bu
XaDaa
IxL.x.l
XxLrx
a
202xl
3=
303U
4xl
Wn
m
51&x”
1
S4x.ua (cm’tain
dwigmtima
~
‘
5MU
.-
lml.
Downloaded from http://www.everyspec.com
-*
Slm
see tioml ar.a
,
oq. im. (q. cm.)
dmrmtwlmlca
bra
mm, rude
~
dhnt.rr,
(d
lm.
(Wmx.)
Ibt owr 0.7>
(4.*)
quww ,
tuxhgolu
, Bhtpo,
hr-sised
●hlp.# ;
light
fist bra
ti2 (12.7}
Blooms, bllhte.,
slabs, rourd,
.quar*s,
slups
Large ●ectlons
I.zu.x
l.n (12.7)
I bar 16.0 (1OJ.2)
I
1 (25.4)
mitaida ad Ua8r.w
To 16.0 (10].2)
Owr
16.0 (103.2)
Ihiebonm up to
2 imlwa (Ye. b)
ShLmt,●trip
shot, strip
V2 (12.7)
1 (21.4)
-
Yhiakucm
2 iooks and-oikr
(lo.k)
m
kt of * lull
#i* rnlhd ( out)
:romlmrgor
#lm*ta
)
U2 (22.7)
Qkd l.or@Wimlly
Rolled trt-
(22.7)
1 (25.4)
1 (25.4)
r
l/2 (12.7)
I
1 (25.4)
versely
Shnt
nhllm pmducti
Wtn
rcdn●d wire
l/2 (12.7)
rolled tnomVernly ; 0.0%
iorh (0.9&m)
or 10ss
-
1 (25.4)
k+ 16.0 (103.2)
l/2 (12.7)
tier 16.0 (103.2)
1 (25.4)
Chip droll bo taken by milliwor nbhioim
tb full cross smtion of the wireor tim
.
Downloaded from http://www.everyspec.com
Fed. Std. No. 66D
A
B
c
FIcuac1. Drill locations for obtaining product analysis
saIEplcs
.
5.
STAINLESS AND HEAT-RESISTING STEEL COHPOSIT’IONS
5.1 Forms. Stainless and heat-resisting steels specified by composition
are ordered as standard steels and are available as bars, as semifinished
products (blooms, billets, and slabs) 4 inches square or larger, and as
plates, shapes, sheet, strip, and wire.
5.2 Description. The chemical composition and product analysis tolerances
for stainless and heat-resisting steels are covered in tables contained in
the Steel Products Manual published by AISI. The applicable section of the
Manual is titled Stainless and Heat Resisting Steels.
6. ALLOY STEEL COMPOSITIONS
Standard alloy steels, ordered by identification number, are
6.1 FO~S.
available as bars, billets, blooms, and slabs. They are generally also available as shapes, sheet, strip, wire, and seamless tubing. Some producers may
not furnish standard alloy steels
in all of these forms, or they may accept
orders only if based on specifying such forms as “other-than-standard” steels.
6.2 Description. The chemical composition, ranges and limits, and product
analysis tolerances for alloy steels are covered in tables contained in the
Steel Products Manual published by AISI. The applicable sections of the
Manual, covering the available forms, are as follows:
(a) Alloy Steel Sheets and Strip
(b) Wire and Rods, Alloy Steel
6.3 Unlisted alloy steels. Unlisted alloy steels
include:
..
(a) Semifinished products (blooms, billets, and slabs) that exceed 200
square inches in cross-sectional area.
10
Downloaded from http://www.everyspec.com
Fed. Std. No. 66D
(b) Basic forms (bars, semifinished products, plates, shapes, sheet,
strip, wire, and seamless tubing) ordered in compositions that are not
standard, i.e. the percentages of some of the elements are outside of the
chemical composition ranges shown in the tables for standard alloy steels.
STANDARD H-STEELS
7.
.
7.1 Identification. H-steels are comprised of standard steels manufactured
to fine-grain steel practices and available as bars, billets, blooms, and
slabs, or seamless tubing. These steels are ordered by identification numbers
including the prefix or suffix letter “H” as well as by hardenability limits
selected In accordance with 7.2. Chemical composition for other sizes and
forms, as well as hardenability limits for coarse-grain steels must be negotiated between the procuring agency and the contractor. The chemical compositionsof standard E-steels are covered in Volume I of the SAEll~dbook published
by the Society of Automotive Engineers (SAE) and in the following sections of
the Steel Products Manual published by AISI:
(a) Wire and Rod, Alloy Steel
(b)
Alloy Steel:
Semifinished; Hot Rolled and Cold Finished Bars
7.2 Hardenability bands. Typical hardenabf.lityband limits are shown
graphically and as tabulations in Figure 2. In graphic form, the horizontal
coordinate represents the distance from the quenched end of the standard
(Jominy one-inch, end-quench hardenability) test bar, while the vertical
coordinate represents the Rockwell “C” hardness values derived from the test
data. In tabular form, one column represents the distance away from the
quenched end of the standard test bar, while two other columns indicate the
minimum and maximum Rockwell “C” hardness values for each distance.
Hardenability band limits for all H-steels are contained in Volume 1 of
the SAE Handbook published by SAE and in the following sections of.the Steel
Products
Manual
published
by
(a) Wire and Rod, Nloy
(b) Alloy
Steel:
AISI:
Steel
Semifinished; Hot Rolled and Cold Finished Bars.
The graphs are used for estimating the hardness values obtainable at
various deptha, and also for comparing hardenability. To ensure accuracy and
uniformity, the tabular values are used for specifying hardenability limits.
Hardenability limits are specified as a range; hence two or more values are
selected to designate the desired hardenability. The preferable method is to
designate only two values from the hardenability table. There are four methods
of designating the two values, depending on known design requirements. Figure
2 illustrates each of the four methods of designating hardenability.
11
Downloaded from http://www.everyspec.com
Fed. Std. Nol 66D
In cases where it is necessary to specify more than two points on the
hardenability band (exclusive of the maximum and mf.nimumlimits at a distance
‘of 1/16 in.), a tolerance of two points Rockwell *’C”over any small portion
of either curve (except at a distance of 1/16 in.) is customary. This tolerance is necessary because tunes of individual heats vary somethat in shape
from the standard band limits and thus deviate slightly at one or more positions in the full length of the curves. This method, however, may result in
procurement difficulties and higher costs because of the additional problems
in producing heats of H-steel so that all hardness values will fall within the
standard band.
When an E-steel is specified, the contractor will report to the procuring
agency the herdenebility characteristics of each heat of steel supplied. The
hardanabllity will be shown by hardness values at the specified reference
points. Wwever, if the full H-band la specified, hardness values will be
shown at the following distances from the quenched end of a standard test
specimen: 1/16, 1/8, 1/4, 1/2, 3/4, 1, 1-1/4, 1-1/2, 1-3/4, and 2 inches.
Values below 20 Rochell “C” are not specified because such values are below
the normal range of the “C” scale. The hardenability will be detemlned from
either a cast, rolled, or forged bar tested in accordance with the end-quench
hardenability test described in ASTM A255, End-Quench Test for Hardenebility
.of Steel.
12
.
Downloaded from http://www.everyspec.com
Fed.
HA12DENABLITY
I
I
c
I
Mn
BAND
Si
I
No.
66D
H86300
Ni
I
Std.
Cr
I
NO
I
.27/33 I .60/.95I .20/.35I .35/.751.W.6S
I
I
.15/.25
I
.66
80
66
60
4s
40
w
36
1
[
1
1
1
1
I
1
1
1
1
1
1
1
1
1
1
I
I
[
[
1
1
1
I
1
I
[
1
1
i
1
J
1
1
1
I
1
#
1
,
1
1
1
I
1
1
r
1
1
1
1
I
[
1
1
1
1
r
1
1
1
1
1
1
1
1
1
,
1
30
26
I
1
1
I
~1-
r
I
1
1–
1
1
1
r
I
I
1
I
1
1 —[T-–
1
1
1
[
t
1
I
20
16
rl
90
6t
1
1
2
1
1
4
c
!
1
L
t
1
6
t- S
a
1
DISTANCE
1
,
!
r
1
I
[
1
I
1
1
1
1
1
1
!
1
1
1
—
1
I
B
1
1
1
1
1
12
Id
16
la
20
FROM QUENCHED END OF SPECIMEN
~d~krdneaa
maximum hardnens vBluea st
● desired
A-A—J43/54
value st minimum snd maximum
C-TWo
maximum hardn-
D-Two
minimum hardnes value at two desireddistmmes.
1
I
22
24
28
20
valuea at tw’odesireddistwmea.
-%
aa
in.
C-C—J50-% in. max.
J34-l% in. max.
54 in. min.
J21- I’??in. min.
Examplesillustrating
alternM,e methods of specifying requirements.
(Tabulated
30
- SIXTEENTHS
=‘~ in. to ~ in.
% in. ●t left and
(Minimum distance to nearest
maximum to nearest % in. at right).
D-D-J35=
FIGURE 2.
m
I
Example
B-B-J39
B-A
1
+
,
10
Method
A—M$tmain:and
1
1
hardness
values
13
wed in ordering).
Downloaded from http://www.everyspec.com
Fed. Std. No. 66D
MILITARYCUSTODIANS:
Preparing activit~:
Anuy-MR
Navy
-
Amy-m
SH
Air Force
- 11
CIVIL
Review activities:
JFK
FPI
Army -MI,MR
NBs
Pss
Navy - AS, YD
DSA - IS
HNE
User activities:
AmyAT, AR, NE
Navy - SA
14
--
AGENCIES INTEREST:
Downloaded from http://www.everyspec.com
INSTRUCTIONS:Inm cootinuiDg
effort
to*
aubudtting commeotE aud ~=
ourstsdudhtiondocuments
bettmr,
tbeDoDPwTMEs tbiBformfoEaEE&n
for impmwemeok
W
wrs
Of titu’y
documents UE illdtd
~tion
to protids
fOTLU
I-Y be -edi
foddedabnfJ the Iinee iwikatod, taped alomEtbe la
edge (DO NOT STXPLE), sad
pErtkuk problem uoEs Eucbu word@ WMchrwmh’edbt
erpmtstkxhwm
lrmiled. In block qbeuspdf’kupo dbhdxmt
so=
m
rigid,
rectrictivo,
looee,
unb~w
orm incompatible,
andgin Pmpooed wording Asngee whieb wouldellevhte
the
!lt.
xfbkwk7i
9filkdout,M
pobleuu.Enter
inblock6 SBYrtmsrkE
notrelated
toa cpecifii
paragraph
oftbedomuoe
acknowledgement
willbe mailed to you within 90 days to let you know that your commentE was rux&edandEM being
too
considered.
NOTE:
‘I%u form may not be used to
specifkation
request
wpi-
requirementJ on cux?ent contracts.
of documenb,
Comments
to waive anY portion of ,tie referenced document(s)
subndtted
or to amend
nor to request m
Ck!vbtions,
or C12rifiiation of
on this form do not constitute or imply ●uthorization
contractual
requirements.
*e
.=
—7 -----
(Pdd
w
thI# Une)
DEPARTMENT OF THE ARMY
111111
NO POSTA~E
NECmRY
IF MAILED
IN TME
UNITED
OFFICIAL
PENALTY
BUSINE~
FOR PRIVATE
USE S300
BUSINESS REPLY MAIL
‘FIRST CLASS
PERMIT
NO. 120S2
WASHINGTON
O. C.
POSTAGE WILL BE PAID BY THE DEPARTMENT OF THE ARMY
Director
US Army Ma-rids
and Mmhanics
Attn: XmMR-sss
Watortoun
MA 02172
Reeoarch Catt@r
STATES
Downloaded from http://www.everyspec.com
NOT MEASUREMENT
NOTICE OF
vALIDATION
SENSITIVE
FEU-STD-66D
NOTICE 1
18 January 1991
FEDERAL STANDARD
CHEMICAL COMPOSITION AND HARDENABILITY
STEEL:
FED-STD-66D adopted on 8 14arch1979 has been reviewed and determined to be
valid for
use
in
acquisition.
Military Coordinating Activity:
Army - MR
Custodians:
Army - MR
Navy - SH
Air Force - 11
AMSC WA
DISTRIBUTION STATEMENT
A
FSC 95GP
Approved for public release; distribution unlimited.
Downloaded from http://www.everyspec.com
NOTICE OF
CANCELLATION
FED-STD-66D
NOTICE 2
February 16, 2001
FEDERAL STANDARD
STEEl: CHEMICAL COMPOSITION AND HARDENABILITY
Federal Standard FED-STD-66D, dated March 8, 1979, is hereby canceled. This federal
standard is superseded by SAE-AMS-STD-66, “Steel: Chemical Composition and Hardenability.”
SAE-AMS-STD-66 was DoD adopted on February 16, 2001.
(Copies of AMS-STD-66 may be purchased from SAE International, 400 Commonwealth
Drive, Warrendale, PA 15096-0001.)
Preparing activity:
Army-MR
:
(Project (95GP-0429)
FSG 95GP
Downloaded from http://www.everyspec.com
NOTICE OF
CANCELLATION
FED-STD-66D
NOTICE 3
8 January 2010
FEDERAL STANDARD
STEEL: CHEMICAL COMPOSITION AND HARDENABILITY
FED-STD-66D, dated 8 March 1979, is hereby cancelled. This federal
standard is superseded by SAE AIR4127, “Steel: Chemical Composition and
Hardenability". SAE AIR4127 was DoD adopted on 19 March 2009.
CAUTION: The supersession information is valid as of the date of this
notice and may be superseded by subsequent revisions of the superseding
document.
(Copies of SAE AIR4127 are available from SAE International, 400
Commonwealth Drive, Warrendale, PA 15096-0001 or online at www.sae.org.)
Custodians:
Army - MR
Navy - AS
Air Force - 11
Preparing Activity:
Army -MR
(Project : 95GP-2010-001)
NOTE: The activities listed above were interested in this document as of the date
of this document. Since organizations and responsibilities can change, you should
verify the currency of the information above using the ASSIST database at
http://assist.daps.dla.mil/.
AMSC N/A
FSC 95GP