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Ultrasonic inspection method for deformed aluminum alloy products GB 6519-86
Ultrasonic Testing Method for Deformable Aluminum Alloy Products
Ultrasonic testing is an important means of ensuring the quality of deformable aluminum alloy products. Ultrasonic testing of metal materials can detect surface and internal defects, measure the thickness of metal materials, and det......
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Development Trends of Steel Structure Industry
The Development of Steel Structural Industry
Steel structural industry is an important basis for the construction industry and plays an irreplaceable role in the development of chinas economy and national construction engineering. With the rapid development of chinas economy, the steel structure ......
Technical conditions for high manganese steel castings GB 5680-85
Technological condition of high-manganese steel castings
High manganese steel castings are a kind of alloy castings, which are mainly composed of high manganese steel materials, and contain trace elements such as silicon, nickel and chromium. Most of them are pearlite low-carbon high-manganese ste......
Agricultural composite steel (YB/T5003-1993)
Introduction
Farm use composite steel is a type of boneless steel. It is made of composite steel tube, cylindrical steel and flat steel. In 1993, the Ministry of Agriculture issued the national standard YB /T5003-1993 for farm use composite steel, which stipulated the production technology, size,......
GB 3838-88 Surface Water Environmental Quality Standard
GB 3838-88 Groundwater Environment Quality Standard
Introduction
The quality of groundwater is important for human activities, environment protection and ecological security. To ensure the quality of groundwater, the Environmental Protection Agency of China (EPA) established the Groundwater Env......
GB/T24001-96 Environmental Quality Standard
Introduction
GB/T24001-2004 is a national standard in China for environmental management systems stipulating the requirements of an environmental management system. This standard applies to any organization that wants to establish and maintain an effective environmental management system (EMS) an......
JGJ81-2002 Construction steel structure welding technical specification (fourth)
National Technical Specifications for Steel Building Co welding of JGJ81-2002
In 2002, the National Technical Specifications for Steel Building Co welding (JGJ81-2002) was introduced for the construction industry. This document embodies a set of rules and norms that are intended to standardize an......
Steel marking code (GB/T15575-1995)
Steel mark codes (GB/T15575-1995)
The steel mark code system (GB/T15575-1995), also known as “Steel Mark Identification and Classification” is a set of 22 characters that in China are used to identify and classify different steels. Each character has a corresponding meaning, and a specific orde......
GB/T 2517-1981 Designation, chemical composition and mechanical process properties of hot-rolled steel sheets and strips for general structures
GB/T 2517-1981 Hot Rolled Symbols, Chemical Composition and Mechanical Properties of Steel Plate and Strip for General Structures
GB/T 2517-1981 specifies the symbols, chemical compositions and mechanical properties of hot-rolled steel plates and steel strips used in general structures. All of th......
GB/T 2517-1981 Allowable deviations of hot-rolled steel sheets and strips for general structures
GB/T 2517-1981
General Structural Hot Rolled Steel Sheets and Strips Allowable Deviation
GB/T 2517-1981 is a standard for hot rolled steel sheets and strips for general structural purposes. Adopted on June 1, 1981, it was issued and promulgated by the Peoples Republic of China General Administrat......
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