GB/T 10046-2018 English PDF (GBT10046-2018)

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GB/T 10046-2018: Silver brazing filler metals
GB/T 10046-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.160.50
J 33
Replacing GB/T 10046-2008
Silver brazing filler metals
银钎料
(ISO 17672:2016, Brazing - Filler metals, MOD)
ISSUED ON: MAY 14, 2018
IMPLEMENTED ON: DECEMBER 01, 2018
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 4
1 Scope ... 7
2 Normative references ... 7
3 Model ... 8
3.1 Method of model preparation ... 8
3.2 Model example ... 8
4 Technical requirements ... 8
4.1 Product form ... 8
4.2 Chemical composition ... 9
4.3 Dimensions and tolerances ... 13
4.4 Supply status ... 15
5 Test methods ... 15
5.1 Chemical composition analysis of brazing filler metals ... 15
5.2 Mechanical property test of brazed and soldered joint ... 15
5.3 Wettability test of brazing filler metals ... 15
6 Inspection rules ... 16
6.1 Heat number division ... 16
6.2 Sampling method ... 16
6.3 Acceptance ... 16
6.4 Reinspection ... 16
7 Packaging, marking, quality certification ... 17
7.1 Packaging ... 17
7.2 Marking ... 17
7.3 Quality certification ... 17
Annex A (Informative) Structural changes of this Standard compared with ISO
17672:2016 ... 18
Annex B (Normative) Determination of silver content ... 19
Annex C (Normative) Determination of copper content - Electrolysis-
spectrophotometry ... 24
Annex D (Normative) Determination of zinc and cadmium content - EDTA
titration method ... 29
Annex E (Normative) Determination of nickel content ... 35
Annex F (Normative) Determination of tin content - Potassium iodate titration
method ... 43
Annex G (Normative) Determination of lithium content - Atomic absorption
spectrometry ... 48
Annex H (Normative) Determination of indium content ... 52
Annex I (Normative) Determination of aluminum content - Sodium fluoride
replacement -EDTA titration method ... 59
Annex J (Normative) Determination of manganese content ... 63
Annex K (Normative) Inductively coupled plasma atomic emission spectrometry
... 69
Annex L (Informative) Model comparison of brazing filler metals ... 79
Silver brazing filler metals
1 Scope
This Standard specifies the requirements such as model, technical
requirements, test methods, inspection rules, packaging, marking, quality
certification of silver brazing filler metals.
This Standard applies to silver brazing filler metals used in brazing methods.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 6682 Water for analytical laboratory use - Specification and test
methods (GB/T 6682-2008, ISO 3696:1987, MOD)
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 11363 Test method of the strength for brazed and soldered joint (GB/T
11363-2008, ISO 5187:1985, NEQ)
GB/T 11364 Test method of wettability for brazing filler metals (GB/T 11364-
2008, ISO 5179:1983, NEQ)
GB/T 12806 Laboratory glassware - One-mark volumetric flasks (GB/T
12806-2011, ISO 1042:1998, NEQ)
GB/T 12808 Laboratory glassware - One mark pipettes
GB/T 12809 Laboratory glassware - Principles of design and construction of
volumetric glassware (GB/T 12809-2015, ISO 384:1978, NEQ)
GB/T 12810 Laboratory glassware - Volumetric glassware - Methods for use
and testing of capacity (GB/T 12810-1991, ISO 4787:1984, IDT)
6 Inspection rules
Finished brazing filler metals are inspected by the manufacturer's quality
inspection department according to the heat number.
6.1 Heat number division
The definition of heat number of brazing filler metals depends on the method of
smelting and refining, as follows:
- In the metal smelting process, slag-metal or gas-metal reactions occur. The
heat number refers to the material obtained from the same furnace smelting.
- In the metal smelting process, no obvious chemical reactions occur (such
as induction melting or vacuum melting in a controlled atmosphere). The
heat number refers to a group of materials obtained by continuous smelting
under the same conditions in a smelting furnace, using one lot of metals
and alloy elements with controlled burden. And the chemical composition
of each furnace of smelting material is in line with the purchaser or brazing
filler metal manufacturer's specified range.
6.2 Sampling method
During the inspection of each furnace of brazing filler metals, according to the
required quantity, representative samples shall be taken from at least three
locations. The sampling method and sampling location shall be recorded.
6.3 Acceptance
The manufacturer of brazing filler metals shall, in writing, provide the main
performance parameters such as chemical composition, dimensions,
appearance of brazing filler metals; declare that "when tested in accordance
with this Standard, the brazing filler metals provided meet the requirements of
this Standard".
6.4 Reinspection
When any one of the inspections fails, this item shall be double reinspected.
For the chemical composition analysis of brazing filler metals, only those
elements that do not meet the requirements are reinspected. The results of the
doubled reinspection shall meet the requirements of this item.
If the reinspection result is still unqualified, brazing filler metals in this furnace
cannot be delivered as finished products, which meet this Standard.
Annex B
(Normative)
Determination of silver content
B.1 Silver chloride gravimetric method
B.1.1 Scope
This method is suitable for the determination of silver content in silver brazing
filler metals. Determination range (mass fraction): 25.0%~99.95%.
B.1.2 Method summary
USE nitric acid to decompose the test portion. If there is precipitation, after
filtration, add hydrochloric acid to form silver chloride precipitation; USE a glass
crucible to separate it; and, weigh its mass after drying (the filtrate may be used
to determine the copper content).
B.1.3 Reagents
B.1.3.1 Nitric acid (1+1).
B.1.3.2 Nitric acid (1+100).
B.1.3.3 Hydrochloric acid (1+9).
B.1.4 Analytical procedures
B.1.4.1 Test portion
WEIGH 1.0 g of sample, accurate to 1 mg.
B.1.4.2 Determination
B.1.4.2.1 PLACE the weighed test portion (B.1.4.1) in a 300 mL tall beaker;
ADD 10 mL of nitric acid (B.1.3.1) and cover with a watch glass; slowly heat to
decompose; BOIL to allow nitrogen oxides to escape. USE water to rinse the
inner wall of the beaker; ADD warm water to 50 mL. At this time, if there is
precipitation, it shall let it stand for 1 h in a place where the temperature is
slightly higher; then use slow-speed filter paper to filter it. USE hot nitric acid
(B.1.3.2) to wash the precipitation.
B.1.4.2.2 ADD water to 150 mL; while stirring, add hydrochloric acid (B.1.3.3)
solution after calibration, in moles per liter (mol/L);
V0 - The value of the volume of ammonium thiocyanate standard titration
solution consumed for calibration, in milliliters (mL);
107.868 - The value of the molar mass of silver, in grams per mole (g/mol).
Calibrate three parts in parallel. The range of the volume of the ammonium
thiocyanate standard titration so...