T/CWAN 0021-2021 Gold-tin alloy pre-formed welding sheet and recommended specifications for application

GB/T 1425-1996 Determination of melting temperature range for precious metals and their alloys—Testing method of thermal analysis GB/T 1425-2021 Determination of melting temperature range for precious metals and their alloys—Testing method of thermal analysis GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.2-2008 Sampling procedures for inspection by attributes—Part 2:Sampling plans indexed by limiting quality(LQ)for isolated lot inspection GB/T 2828.3-2008 Sampling procedures for inspection by attributes—Part 3:Skip-lot sampling procedures GB/T 2828.4-2008 Sampling procedures for inspection by attributes—Part 4:Procedures for assessment of declared quality levels GB/T 2828.5-2011 Sampling procedures for inspection by attributes—Part 5:System of sequential sampling plans indexed by acceptance quality limit(AQL)for lot-by-lot inspection GB/T 2828.10-2010 Sampling procedures for inspection by attributes—Part 10:Introduction to the GB/T 2828 series of standards for sampling for inspection by attributes GB/T 2828.11-2008 Sampling procedures for inspection by attributes—Part 11:Procedures for assessment of declared quality levels for small population GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 8979-1996 Pure nitrogen GB/T 8979-2008 Pure nitrogen and high purity nitrogen and ultra pure nitrogen GB/T 17684-1999 The terminology for precious metals and their alloys GB/T 17684-2008 Terminology for precious metals and their alloys GB/T 33148-2016 Soldering and brazing terms GJB 6468 YS/T 746.1-2010 Methods for chemical analysis of lead-free tin-based solders—Part 1:Determination of tin content—Pyrogallic acid demasking-lead nitrate titrimetric method YS/T 746.2-2010 Methods for chemical analysis of tin-based lead-free solders—Part 2:Determination of silver content—Flame atomic absorption spectrometric method and potassium thiosulfate titrimetric method YS/T 746.3-2010 Methods for chemical analysis of tin-based lead-free solders—Part 3:Determination of copper content—Flame atomic absorption spectrometric method and sodium thiosulfate titrimetric method YS/T 746.4-2010 Methods for chemical analysis of lead-free tin-based solders—Part 4:Determination of lead content—Flame atomic absorption spectrometric method YS/T 746.5-2010 Methods for chemical analysis of lead-free tin-based solders—Part 5 Determination of bismuth content—Flame atomic absorption spectrometric method and EDTA titrimetric method YS/T 746.6-2010 Methods for chemical analysis of lead-free tin-based solders—Part 6:Determination of antimony content—Flame atomic absorption spectrometric method YS/T 746.7-2010 Methods for chemical analysis of lead-free tin-based solders—Part 7:Determination of iron content—Flame atomic absorption spectrometric method YS/T 746.8-2010 Methods for chemical analysis of lead-free tin-based slders—Part 8:Determination of arsenic content—Molybdenum antimony arsenate blue spectrometric method YS/T 746.9-2010 Methods for chemical analysis of lead-free tin-based solders—Part 9:Determination of zinc content—Flame atomic absorption spectrometric method and Na2EDTA titrimetric method YS/T 746.10-2010 Methods for chemical analysis of lead-free tin-based solders—Part 10:Determination of aluminum content—Electrothermal atomic absorption spectrometric method YS/T 746.11-2010 Methods for chemical analysis of lead-free tin-based solders—Part 11:Determination of Cadmium content—Flame atomic absorption spectrometric method YS/T 746.12-2010 Methods for chemical analysis of lead-free tin-based solders—Part 12:Determination of Indium content—Na2EDTA titrimetric method YS/T 746.13-2010 Methods for chemical analysis of tin-based lead-free solders—Part 13:Determination of nickel content—Flame atomic absorption spectrometric method YS/T 746.14-2010 Methods for chemical analysis of lead-free tin-based solders—Part14:Determination of phosphorus content—Crystal violet phosphorus-vanadium-molybdenum heteropoly acid spectrophotometry YS/T 746.15-2010 Methods for chemical analysis of lead-free tin-based solders—Part 15:Determination of Germanium content—Salicylfluorone-sim polyethylene glycol phenyl ether spectrophotometry YS/T 746.16-2010 Methods for chemical analysis of lead-free tin-based solders—Part 16:Determination of total rare earth content—Arserazo Ⅲ spectrophotometry YS/T 746.17-2018 Method for Chemical Analysis of Lead-free Sn-based solder - Part 17: Determination of Ag, Cu, Pb, Bi, Sb, Fe, As, Zn, Al, Cd, Ni, and In - Electro-magnetic induction coupled plasma atomic emission spectroscopy GB/T 8979-2025 Pure nitrogen,high purity nitrogen and ultra pure nitrogen