ASTM B73-29

Specification for Silver Solders (Withdrawn 1952)

General Information

• Status: Withdrawn
• Technical Committee: B02 - Nonferrous Metals and Alloys

Standards Content (Sample)

•
STAN.DAR 0 SPECll"'!CA'l'lO~S
JiCfit.
1
SR.VER SOLDERS
.i\.S.l:i,.M. D~gl1~4)11; B ~3 - 29
Tb!se ~pedfk:ado.ns .rs.re l~ed ·under tlie n~d d,eSigunti~n 1J 13; :the fin~
?At~moorfodi~tmtt'tt~ )'tiar,~f iM"uti~«\l 11ttr'lptfo·n ~s s~at-d·ttl':~ in t.bie eitse o{ R'\'isit".WA
~·~e y~•u; ;nf· fas:t t.evisi~
JsslrEll An ~fEN'l'Al'lt~ •. l~:u;.; .~\DGY!liit !l~ .A~Ui):J)FJ.l:t l"f'i?l';\l, 1'92!)~
L (a) ."J,'hese spec}ij<41tl{)J:is vcrwer. dght &~ :zinc .alloy$ ·· in 'Mt(:~ $trip,, . :sheet o.r ·.· g1~aindar 1'o:ttn, 11sed I0:r b~mg
purpose$ ,and· 1;t)mmerdalty kiramvu as silvex soklet'E$"
· .(!>) · :rhe ·eight. g1:a>Ck$ 'Of ~h·eT SlJfOtrrs covered by these· '$(t<.ilfo.a.-.
t1.ons 'Sh~tU be designateq ns Girade3 Nos . fto 8 in ae~t>:itlan.ce '\vifb their
che~niea1 . composUio11 as ~pecl:fief}il:l 50CtiQ1l (;.
(t'.) The c:OOice iof t:~e grti;ie :~l s~Jder for any SIJ~fled p-u1pose
depenr]s · on.· tf.i,e m~tedal · ln c;onn~ction . wlth 1yhfoh it is Jo . he ltsed.
Reconµnend.ntlon~ 1·~gar and melting .ranges a.re g!ven in the .Appei1dix to the.se specification$ .
. ~rANU.FA 2~ The ·all9ys shall be made from v.ir(?in metal~ or such ·~lean I>roc~sa~
scrap as ~l~Y result ffom t~e m~ufach1re 9f.arode5 of tb;¢ SAn:te or
sim1ia1· con1;posltion~ .· . . . . . . . . . • . . .· .· . · ·. . .·.··. . . . . .
a. Strlp. pr &heet sokler slJ.all. be ·. c:old wiled tq ·s.ize and, unless
othetwise ~pecifiedj shaU be IU.rilished h1 the Ja:atd <;ondition~
4. Wire shall· 'be .cold d~'\Vl'l to ·size, ~nd:.· unless .· othe;nvise st:leci~
fied,:shallbe a1mi:~ted after cold drawing and pickled htight.
5.· .Granular ·.solder l$llaJl~,-prodticed ·lly ·.filing, ·grinding or. ot}le·r
process pf. gnLntilatio11!' The in.atedal s.ha.11 be s~ippl'ied in siZt}s
specified m -0p~n.Jpg pf ,t~~ St~11d~1d Specifit~tiP!l$ for Si~vesJpr T~~rting Purposes
(A~S~l\~~L Designatiol1t J$ 11) of the ktnerican Society fot Testi.t1g
1
l\!itter:la.Js . .The material shall contain not mnte ·· than Jo per ~~nt
over the ·see~ffied size. · ·
, U.Qd$r ih~ s.t;andard~tion~t!~.ot t11cSm:ii:t.r, :ntl!S!i specifieations tite under ilieJtu·~ietion
oI the A.~S, T~M~ Comi;Oi~~ B·2.'t)nNQn-:Ferroia:a Met111s n.n -s'J93·3 Bm:ik .Of .A.S.T.'M• Stllnd~rda. P.nrt U~ p.1241!.;
s l.,.-53 {813}

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814 SPECIFICATIONS FOR SILVER SOLDERS
CHEMICAL PROPER TIES AND TESTS
Chemical
6. The alloys shall conform to the following requirements as to
Composition.
chemical composition, within t he permissible variations specified in
Section 7:
GRADE StLVRR, COPPER, Z1sc, CAD'.\flUM, IMPURtTIBS, M' Ax .
No. PER CENT PE:R CENT PER CENT CllNT FER CENT,
P"R
1. . . . . . . 10 52 38 0. 15
a
2 . . . . 20 45 35 0. 15
a
20
3 . . . . . . . 45 30 5 0. 15
4 . . . . . . . 45 30 25 nil 0.15
34 nil
5 . . . . . 50 16 0. 15
65 20 15 nil 0. 15
6 . . . . . .
20 nil
7 . . . . . . . . . . . . . . . . . . 70 IO 0. 15
16 4 nil 0. 15
8 . · . . . . . . . . . . 80
0
The add ition not to exceed 0.50 per cent of cadmium to assist in fabricat ing Grades Nos. 1 and ·2
shall not be considered as a harmful impurity.
Permissible 7. The permissible variation from the percentages, specified in
Variations.
Section 6, of silver, copper and zinc, for all grades shall be plus or
minus 1 per cent in the case of silver and copper and 2 per cent in
the case of zinc. The permissible variation in the percentage of
cadmium for Grade No. 3 shall be plus or ·minus 1 per cent.
8. A composite sample of not less than 1 oz. shall be taken from
Sample for
Chemical
each lot of 50 lb. or fraction thereof of Grades Nos.1 , 2 and 3, and from
Analysis.
each lot of 20 lb. or fraction thereof of Grades Nos. 4, 5, 6, 7 and 8.
Samples of granulated solder shall consist of the grains as prepared.
Samples from wire, sheet or strip shall be taken by ~bearing or clip­
ping pieces from the entire cross-section of the same, remelting in a
cleab container at a temperature slightly above the melting range,
mixing thoroughly, and pouring into a cold mold of convenient size
for milling, drilling or sawing. The sample so prepared shall bt> milled,
drilled or sawed in such a manner as to represent the entire cross­
section. The saw, drill, cutter or other tool used shall be thoroughly
cleaned. No lubricant shall be used in the operation, and the sawings
or metal chips shall be carefully treated with a magnet to remove any
particles of steel introduced in taking the sample.
9. In the case of disagreement, the solder shall be re-sampled in
the presence of the manufacturer and purchaser. The sample shall
consist of not less than 3 oz. of sold er p
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