GB/T 1979-2001: Standard diagrams for macrostructure and defect of structural steels

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Scope

This Standard specifies and describes the classification, characteristics, causing
reasons and assessment principles, classification and the scope of application of the
standard diagram, assessment methods and test report of acid-pickling
macrostructure-defect of structural steel.
This Standard is applicable to assess the allowable and unallowable defects in the
acid-pickling macrostructure of the cross-section of carbon structural steel, alloy
structural steel and spring steel products (forging billet, rolling billet). According to the
agreement between the supply-demand parties, it can also be used to assess the
defects in other steel’s macrostructure.

Basic Data

Standard ID	GB/T 1979-2001 (GB/T1979-2001)
Description (Translated English)	Standard diagrams for macrostructure and defect of structural steels
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H24
Classification of International Standard	77.040.01
Word Count Estimation	59,592
Date of Issue	2001-12-17
Date of Implementation	2002-05-01
Older Standard (superseded by this standard)	GB/T 1979-1980
Quoted Standard	GB/T 226;
Summary	This standard specifies: Simple CNC horizontal lathe manufacture and acceptance requirements. This standard applies to: Maximum turning diameter over bed of 250-1250mm, maximum workpiece length to 800, mm-Jane CNC horizontal lathe.