新闻

22 11月

ASTM G90-2017 “通过收集自然光源对非金属材料进行加速户外老化测试”

ASTM G90 performs accelerated outdoor aging testing of non-metallic materials by gathering natural light sources ASTM G90-2017 Release information Standard number ASTM G90-2017 Standard Practice for Accelerated Implementation of Outdoor Wind Erosion of non-metallic Materials by means of Concentrated Natural sunlight rays English name Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight Release Date 2017 Implementation date Date of repeal None Chinese standard classification number H25 ASTM G90-2017 “通过收集自然光源对非金属材料进行加速户外老化测试” Published by US-ASTM ASTM [...]

详情...
22 11月

ASTM G92-2020 大气测试场地特征的标准操作规程

ASTM G92-2020 Release information Standard number ASTM G92-2020 Standard operating procedure for atmospheric test site characteristics English name Standard Practice for Characterization of Atmospheric Test Sites Release Date 2020 Implementation date Date of repeal None China Standard classification number Z15 International Standard Classification Number 19.040 Published by US-ASTM ASTM G92-2020 Standard Operating Practice for Characteristics of Atmospheric Test Sites ASTM G92-2020 Scope of application 1.1 “” This practice covers procedures for the characterization of atmospheric test sites. Continuous characterization can provide corrosion data, environmental data, or both which will signal changes [...]

详情...
22 11月

ASTM D2000-2018 “汽车用橡胶制品分类标准”

半径 1.1 该分类系统涵盖了硫化橡胶材料的性能 (天然橡胶, 再生橡胶, 合成橡胶, 单独或组合), 其中包括但不限于汽车应用的橡胶产品. 笔记 1: 该分类系统可以满足其他行业的许多需求，就像 SAE 编号的钢材一样. 然而, 重要的是要记住，当汽车的需要需要时，系统可能会被修改. It is [...]

详情...
22 11月

ASTM D2565-2016 “户外塑料氙弧曝露试验方法”

意义及用途 4.1 The ability of plastic materials to resist deterioration of electrical, mechanical and optical properties due to exposure to light, heat and water is important for many applications. This practice is designed to cause changes in properties related to end-use conditions, 包括日光的影响, 水分, 和热量. The exposures used in this practice are not intended to simulate deterioration caused by local weather phenomena, such as atmospheric pollution, biological attacks, and salt water exposure. 4.2 笔记 [...]

详情...
21 11月

ASTM D3451-2017 涂料粉末和粉末涂料的测试

意义及用途 4.1 本指南提供了选择和使用测试涂料粉末和粉末涂料的程序的有用总结. 除非另有说明, 适用于热塑性和热固性涂料. 按设计, 本指南无意讨论专门为功能性粉末涂料市场开发的测试方法或程序, 运动粘度以 m2/s 为单位测量。过去, 用于管道或钢筋的粉末涂料 (螺纹钢). Information on current testing procedures for pipe and reinforced steel coating powders and powder [...]

详情...
21 11月

ASTM D4101-2019 Polypropylene Injection Molding and Extrusion Materials

concept This specification covers polypropylene materials suitable for injection molding and extrusion, including pure natural color unreinforced polypropylene, unfilled and unreinforced polypropylene, calcium carbonate filled polypropylene, glass reinforced polypropylene, polypropylene copolymer and talc filled polypropylene. Polymers consist of homopolymers, copolymers and elastomers with or without impact modifiers (ethylene propylene rubber, polyisobutylene rubber and butyl rubber), colorants, stabilizers, lubricants or reinforcers. Each sample should be tested to determine the required physical and mechanical properties of the material. The samples of various [...]

详情...
21 11月

ASTM D4340-2019 “Corrosion of Engine Coolant on Cast Aluminum Alloys under Heat Removal Conditions”

意义及用途 4.1 Engine coolant is required to prevent heat transfer corrosion of aluminum cylinder heads during engine operation. Any corrosion products that form may be deposited on the internal surface of the radiator, reducing the heat transfer efficiency of the radiator. Overheating and boiling of the cooling system may then occur. 4.2 This test method provides a way to selectively screen unused engine coolants and easily distinguish those that are not suitable for use with an aluminum cylinder head [...]

详情...
21 11月

ASTM D4364-2022 Standard Practice for Outdoor Accelerated Aging Tests on Plastics Using Concentrated Natural Light

意义及用途 4.1 This practice involves concentrating sunlight through a system of flat mirrors arranged to simulate a parabolic trough focused on an air-cooled target plate on which the specimen is mounted. 桌子 1 describes the exposure cycles with and without water spray commonly used for this method. Other exposure cycles not listed in Table 1 May be used with the consent of the interested party. (一种) This is the period specified in Procedure C of practice D4141/D4141M. 4.1.1 Accelerated outdoor [...]

详情...
20 11月

ASTM D4434-2021 Polyvinyl Chloride Roofing Sheet

concept The specification covers flexible fiber or fabric-reinforced panels made of polyvinyl chloride resin as the main polymer for single-layer roof membranes exposed to weather. The table should contain. Design criteria for on-site roof systems, such as fire resistance, material compatibility, wind lift resistance, in-situ shrinkage, 等等, are beyond the scope of this specification. The sheet shall be tested and shall meet the corresponding physical requirements as follows: total thickness and thin turmeric thickness; Tensile strength at fracture; Breaking strength; [...]

详情...
20 11月

ASTM D4459-2021 “室内塑料氙灯暴露试验”

意义及用途 4.1 这种做法的目的是模拟透过玻璃暴露在太阳辐射下的效果. 该做法使用装有窗玻璃滤光片的氙弧装置进行曝光，并根据做法 G151 和 G155 进行操作. 笔记 2: 实践 D4674 描述了使用荧光灯组合的设备中的曝光 “冷白” 和紫外线 (紫外线) 模拟暴露于室内荧光灯和窗玻璃过滤日光的效果的灯. 4.2 警告 – Results [...]

详情...