Ultrasonic testing principle of weldability of nm400 plate

ASTM A 53 weldability of NM400 plate covers seamless and welded steel pipe with nominal wall thickness. The surface condition is usually black and hot-dipped galvanized. ASTM A 53 weldability of NM400 plate is produced mainly for pressure and mechanical applications, and is also used for transport of steam, water, gas line pipes.

With the development of China's weldability of NM400 plate market economy, the company vigorously implements the strategy of industrialization, internationalization and diversification, promotes group operation, intensive development and lean management, and builds the company into a company with scientific development concept, continuous innovation vitality, excellent corporate culture and strong sense of social responsibility through rich series of weldability of NM400 plate products and project portfolio and complete operation network And international first-class competitiveness of modern enterprises.

The cold bending method is mainly used to produce cold-formed section steel and welded pipe. The cold bending method is to bend the steel strip or steel plate into various cross-section shapes by the cold bending machine in the cold state. If the weldability of NM400 plate steel pipe is bent into a circular, square or other hollow shape and welded by a proper welding method, it is a welded pipe. The advantages of cold bending: first, the cold-formed section steel is light in weight and large in bearing capacity, and it can save metal by replacing the hot-rolled section steel; second, it can produce all kinds of weldability of NM400 plate extremely thin, extremely wide and complex section steel which can not be produced by hot rolling.

Classification of weldability of NM400 plate, steel plate, including strip steel: 1. Classified by thickness: (1) thin plate (2) medium plate (3) thick plate (4) extra thick plate 2. Classification by production method: (1) hot rolled steel plate (2) cold rolled steel plate 3. Classification according to surface characteristics: (1) galvanized sheet (hot galvanized sheet, electro galvanized sheet) (2) tin plate (3) composite steel plate (4) color coated steel plate 4. Classification by use: (1) bridge steel plate (2) boiler steel plate (3) shipbuilding steel plate (4) armored steel plate (5) automobile steel plate (6) roof steel plate (7) structural steel plate (8) electrical steel plate (silicon steel sheet) (9) spring steel plate (10) others

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