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GB 12827-91 standard reference acetylene carbon black and identification method
Carbon black refers to black powdery or granular material, which is composed of many tiny particles with the average particle size of between 10 and 2000 nanometers. It is composedot many carbon atoms buthydrophobic in nature. Carbon black can be prepared by pyrolysis of hydrocarbons such as coal ......
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IN is the German Industrial Standard
DIN is an acronym that stands for Deutsches Institut fur Normung—the German Institute of Standards. Founded in 1917 by the German government, DIN is a non-profit organization responsible for setting and maintaining standards for products, processes, services, systems, and personnel in Germany.
D......
JGJ81-2002 Construction Steel Structure Welding Technical Regulations (Part 8)
Welding technology regulations of building steel structures according to JGJ81-2002(part 8)
Welding of steel structures is an important part of the construction technology of steel structures. In steel structure construction, welding is used to connect steel members, building components and addit......
Ferrochrome nitride (YB/T5140-1993)
：
Chromium nitride iron, also known as compound ferritic nitride (Cr + Fe3N), is a high-performance, wear-resistant material developed in the late 20th century. Its wear-resistant performance is about three times higher than that of a high-speed steel cutting tool, and its mechanical properties a......
Electroslag casting alloy tool steel module (YB/T155-1999)
Introduction
Tool steel is one of the most important components used in metalworking and mechanical manufacturing. It is a special steel alloy composed of many elements and used in a wide range of industrial applications. It has strong wear resistance, high strength and good toughness, as well as......
GB/T 4162-91 Ultrasonic Inspection Method for Forged Steel Bars
材料
Abstract
Ultrasonic testing is an important technique for detection of rolling defects in steel bars. Ultrasonic testing is typically used to detect internal flaws, such as cracks and other discontinuities, that cannot be detected by visual inspection. GB／T 4162–91 regulates the ultrasonic ......
Sintered NdFeB permanent magnet material (ZB/H58003-1990)
Introduction
The sintered Nd-Fe-B magnets, also known as Neodymium or NdFeB magnets, are permanent magnets made of a range of materials, namely an alloy of rare-earth elements neodymium (Nd) and iron (Fe), along with the addition of some boron (B). The powerful magnetic properties of these magnet......
Eddy current test method for titanium and titanium alloy pipes GB/T 12969.2-91
Abstract
This paper introduces GB／T 12969.2-91 Eddy Current Method for inspecting titanium and titanium alloy pipes. Eddy current method is an non destructive testing (NDT) technique for performing the inspection of titanium and titanium alloy pipes. The technique is an electromagnetic test whic......
Flux for submerged arc welding of carbon steel GB 5293-85
GB 5293-85 Carbon Steel Arc Welding Electrodes
The Chinese standard GB 5293-85 Carbon Steel Arc Welding Electrodes is the national standard referenced in China and all others countries using the same standard, which regulates the makeup and use of carbon steel arc welding electrodes.
The main co......
Iron chrome glass sealing alloy 4J28 (YB/T5240-1993)
INTRODUCTION
4J28 is a kind of Fe-Cr-B glass sealing alloy, which is a duplex structure of Cr24-Fe. It is non-magnetic, has excellent corrosion resistance and is applicable to 300℃, which has excellent corrosion resistance and heat conduction performance. It is suitable for the manufacture of vac......
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