GB/T 38970-2020 PDF EnglishUS$125.00 · In stock · Download in 9 seconds
GB/T 38970-2020: Molybdenum and molybdenum alloy powder for addictive manufacturing Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 38970-2020: Molybdenum and molybdenum alloy powder for addictive manufacturing---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT38970-2020GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.160;25.030 H 71 Molybdenum and molybdenum alloy powder for addictive manufacturing ISSUED ON: JULY 21, 2020 IMPLEMENTED ON: JUNE 01, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Technical requirements ... 4 4 Test methods ... 6 5 Inspection rules ... 7 6 Marking, packaging, transportation, storage and quality certificate ... 8 7 Order form (or contract) contents ... 10 Molybdenum and molybdenum alloy powder for addictive manufacturing1 ScopeThis Standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, quality certificate and purchase order (or contract) of molybdenum and molybdenum alloy powder for addictive manufacturing. This Standard applies to molybdenum and molybdenum alloy powder for addictive manufacturing.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 1479.1, Metallic powders - Determination of apparent density - Part 1: Funnel method GB/T 1480, Metallic powders - Determination of particle size by dry sieving GB/T 1482, Metallic powders - Determination of flow time by means of a calibrated funnel (Hall flowmeter) GB/T 4325, Methods for chemical analysis of molybdenum GB/T 5162, Metallic powders - Determination of tap density GB/T 5314, Powders for powder metallurgical purposes - Sampling GB/T 19077, Particle size analysis. Laser diffraction methods YS/T 1297, Measuring method for sphericity ratio of titanium and titanium alloy powders3 Technical requirements3.1 Chemical composition The tap density of the product is measured in accordance with the provisions of GB/T 5162. 4.5 Liquidity The fluidity measurement of the product is carried out in accordance with the provisions of GB/T 1482. 4.6 Appearance quality The appearance quality of the product is inspected visually. 4.7 Others The measurement of the sphericity rate shall be carried out in accordance with the provisions of YS/T 1297, or be determined through negotiation between the supplier and the buyer. The measurement of the hollow powder rate shall be determined by negotiation between the supplier and the buyer.5 Inspection rules5.1 Inspection and acceptance 5.1.1 The product shall be inspected by the supplier to ensure that the product quality complies with the requirements of this Standard and the order form (or the contract); the supplier shall fill in the quality certificate. 5.1.2 The buyer shall inspect the received products in accordance with this Standard and the purchase order (or contract). If the inspection result does not conform to the provisions of this Standard and the purchase order (or contract), it shall be submitted to the supplier within 45 days from the date of receipt of the product, and settled by the supplier and the buyer through negotiation. 5.2 Batch Products shall be submitted for acceptance in batches; each batch shall be composed of products of the same production process, the same designation, and the same category. 5.3 Inspection items and sampling The inspection items and sampling of the product shall meet the requirements of Table 6. Table 6 – Inspection items and sampling c) Designation and category; d) Production batch number; e) Particle size range; f) Net weight; g) Number of this Standard; h) "Inflammable", "Dampproof", "Fireproof", "Prevent inhalation" and other signs. 6.2 Packaging Products shall be packaged in double-layer vacuum plastic packaging in plastic bags; or clean plastic barrels or metal barrels shall be used as the container unit. Use inert gas protection packaging or vacuum packaging. The environment shall be strictly controlled during the packaging process to avoid pollution. The product packaging mass is 5 kg; it can also be packaged according to the buyer's requirements. The packaging container shall ensure its integrity during transportation, and shall not be damaged, damp, or expose the product to foreign contaminants. 6.3 Transportation Products shall be transported in a covered environment. During the transportation process, it shall be protected from rain and damp; severe collision and mechanical extrusion are strictly prohibited. The handling process shall be careful, without upside down; it is strictly forbidden to approach the fire and fire source. 6.4 Storage The product shall be sealed and stored in a ventilated and dry place, away from fire sources. It is strictly forbidden to store it with corrosive substances such as oxidants, acids, alkalis; avoid direct sunlight. 6.5 Quality certificate Each batch of products shall be accompanied by a quality certificate, which indicates: a) Name of the supplier; b) Product name: c) Designation and category; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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