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The development history of various grinding machines
The History of Grinding Machines
Grinding machines have been around for centuries and have been used in various industries for shaping, grinding and finishing various materials. They have evolved from manual labor to sophisticated machinery and are now used in many different industries for a vari......
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Rolling bearing residual magnetic technical conditions
Scroll Bearing Residual Magnetic Technology Condition
The rolling bearing is the most important part of the modern mechanical basic parts. Its quality directly affects the accuracy of the device, the service life and the stability of the machine. According to statistics, due to the accident cause......
ASTM A844/A844M-1993 General requirements for 9% nickel alloy steel plates produced by the direct quenching process for pressure vessels
ASTM A844/A844M-1993
This ASTM A844/A844M-1993 standard specifies the requirements for Grade 9% Nickel Steel plates used in pressure vessels. It applies to plates made by direct quenching and tempering process.
Grade 9% Nickel Steel is an age-hardening nickel-iron-chromium alloy. Nickel increas......
Waste heat treatment steel bars for reinforced concrete (GB 13014-1991)
Heat Treatment of Steel Bar for Reinforced Concrete (GB 13014-1991)
The heat treatment of steel reinforcement for reinforced concrete structures is mainly to control the hardness and strength of steel, reduce the overall weight, and improve the formability, weldability and workability of steel. G......
Deposition efficiency
Concrete Joint Filling Efficiency
In the construction industry, one of the most important aspects of building lasting structures is properly filling concrete joints. Joints are designed to expand and contract with environmental fluctuations, house the cables and pipes necessary for construction, ......
Diameter of Japanese National Standard for Round Electrode Rods
JIS (Japan Industry Standard) round electrodes rods are a type of electrode rod that has been approved by the Japan Industrial Standards Committee, and is widely used in welding and cutting applications in Japan.
JIS round electrode rods are produced in a variety of alloys and sizes, however, the......
Sample sampling method for chemical composition analysis of steel and chemical tolerance of finished product (GB222-84) (2)
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Sample Collection and Chemical Composition Analysis of Steel
Steel is a most widely used material in the 21st century, with the exception of the automotive industry and the construction industry, whose usage covers almost all aspects of modern industry and production. As an important material, ......
Methods of sampling samples for chemical analysis of steel
Chemical Analysis of High-Speed Steel by Sample Taking Method
High-speed steel (HSS) is a type of tool steel that is used in the production of cutting tools due to its ability to withstand intense high speed use. It is resistant to wear and further strengthens when heated. Its chemical compositio......
Guaranteed hardenability structural steel (GB 5216-85)
Overview
The GB 5216-85 is the Chinese national standard for Quenched and Tempered Structural Steels. It contains minimum requirements for chemical and mechanical properties, testing, and inspection practices. Under this standard, steels are classified and evaluated in service depending on their ......
Weldability Test Method for Maximum Hardness of Welding Heat-Affected Zone GB 4675.5-84
Abstract
Weldability testing is an essential part of welding process in the manufacture of structural components to ensure the reliability and durability of the weldments. The highest hardness test method (GB 4675.5-84) is one of the welding performance tests, by which the maximum hardness of the......
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