GB/T 45329-2025 Precious metals and their alloys wrought for ignition electrodes
1 Scope
This document specifies the product classification and labeling, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, as well as accompanying documents of precious metals and their alloys wrought for ignition electrodes.
This document is applicable to precious metal functional materials that generate sparks under electrode discharge.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 1424 Method of measurement of resistivity of precious metals and their alloys
GB/T 2523 Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip
GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 15072.6-2008 Test method of precious metal alloys - Determination of iridium contents for platinum palladium alloys - Electricity titration with ferrous sulfate
GB/T 15072.14-2008 Test method of precious metal alloys - Determination of aluminium and nickel contents for silver alloys - Inductively coupled plasma atomic emission spectrometry;
GB/T 15077 Geometric size measuring methods of precious metals and their alloy materials
GB/T 23275 Methods for chemical analysis of ruthenium determination of lead, iron, nickel, aluminum, copper, silver, gold, platinum, palladium, rhodium, iridium and silicon in ruthenium powder by glow discharge mass spectrometry
GB/T 36592 Methods for chemical analysis of rhodium - Determination of platinum, ruthenium, iridium, palladium, gold, silver, copper, iron, nickel, aluminum, lead, manganese, magnesium, tin, zinc, silicon contents - Inductively coupled plasma mass spectrometry
GB/T 36593 Method for chemical analysis of iridium powder - Determination of silver, gold, palladium, rhodium, ruthenium, lead, platinum, nickel, copper, iron, tin, zinc, magnesium, manganese, aluminum contents - Inductively coupled plasma atomic emission spectrometry
YS/T 201 Sheets and bands of precious metals and their alloys
YS/T 203 Threads, wires, rods of precious metals and their alloys
YS/T 561-2009 Method for chemical analysis of precious metals alloys - Platinum-rhodium alloys - Determination of rhodium content - Hexaammine cobalt nitrate gravimetriy
YS/T 562-2009 Methods for chemical analysis of precious metals alloys - Platinum-ruthenium alloys - Determination of ruthenium content - Thiourea spectrophotometry
YS/T 563-2009 Methods for chemical analysis of precious metals alloys - Platinum-palladium-rhodium alloys - Determination of palladium and rhodium content - Diacetyldioxime gravimetriy tin (II) chloride spectrophotometry
YS/T 1379 Method for chemical analysis of pure platinum - Determination of palladium, rhodium, iridium, ruthenium, gold, silver, aluminum , bismuth , chromium, copper, iron, nickel, lead, magnesium, manganese, tin, zinc and silicon contents - Inductively coupled plasma atomic emission spectrometry
YS/T 1493 Chemical analysis method for high purity platinum - Determination of impurity element content - Glow discharge mass spectrometry
YS/T 1495 Chemical analysis method for high purity rhodium - Determination of impurity element content - Glow discharge mass spectrometry
YS/T 1506 Chemical analysis method of high-purity iridium - Determination of impurity element content - Glow discharge mass spectrometry
3 Terms and definitions
No terms or definitions are listed in this document.
4 Product classification and labeling
4.1 Classification
4.1.1 Products are classified into thread, wire, sheet, strip and profile (profile refers to spherical material, cylindrical material, ring material and conical material, etc.) according to shape. The products produced by extrusion or drawing process are thread and wire (the diameter of less than 0.3mm is thread, and the diameter of not less than 0.3mm is wire); The products produced by the rolling process are sheet and strip (sheet for slice delivery, strip for roll delivery); Other products with irregular shapes are profile.
4.1.2 Products are classified into hard state (Y), soft state (M) and semi-hard state (Y2) according to the supply state. If not indicated, supply in hard state.
4.1.3 Products are classified into iridium base ignition electrode material, platinum base ignition electrode material, rhodium base ignition electrode material and ruthenium base ignition electrode material according to the base metal.
4.2 Labeling
4.2.1 Thread, wire, sheet and strip
Thread, wire, sheet and strip shall be labeled in the order of product name, number of this document, designation, state, and dimension.
Examples of labeling are as follows:
Example 1:
The thread in the designation of Ir92Rh, the state of Y, with a diameter of 0.25mm and a length of 0.50mm is labeled as follows:
Thread GB/T 45329-Ir92RhY-ϕ0.25×0.50
Example 2:
The thread in the designation of Pt30Ir, the state of Y, with a diameter of 0.28mm and delivered in indefinite size is labeled as follows:
Thread GB/T 45329-Pt30IrY-ϕ0.28
Example 3:
The wire in the designation of Ir92Rh, the state of Y, with a diameter of 0.50mm and a length of 1.20mm is labeled as follows:
Wire GB/T 45329-Ir92RhY-ϕ0.50×1.20
Example 4
The sheet in the designation of Ir75Rh, the state of Y, with a thickness of 0.50mm, a width of 4.00mm and a length of 12.0mm is labeled as follows:
Sheet GB/T 45329-Ir75RhY-0.50×4.00×12.0
Example 5:
The strip in the designation of Pt85Ru, the state of Y, with a thickness of 0.19mm and a width of 0.68 is labeled as follows:
Strip GB/T 45329-Pt85RuY-0.19×0.68
4.2.2 Profiles
The labeling of profiles shall be determined through negotiation between the supplier and the purchaser.
Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Product classification and labeling 5 Technical requirements 6 Test methods 7 Inspection rules 8 Marking, packaging, transportation, storage and accompanying documents 9 Order information Annex A (Normative) Determination of ignition electrical ablation Annex B (Normative) High temperature oxidation volatilization mass loss rate
