GB/T 8731-1988: Free-cutting steel--Technical requirements

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Scope

1.1 The dimensions, appearance and allowable deviation of hot-rolled, cold-
drawn steel bars, steel wires and silver steels shall meet the requirements of
Table 1.
As required by the buyer, it can also be delivered in a higher accuracy than that
in Table 1.
1.2 The deformation length at both ends of the hot-rolled steel bar which is cut
by a clipping machine shall not be greater than 20 mm. As required by the buyer,
the burrs on both ends of the steel bar shall be removed.
1.3 The ends of the cold-drawn steel bar shall not be cut bent. When a clipping
machine is used to cut steels, the cut end is allowed to have shear deformation.
After deformation, the maximum size of the end shall not be greater than the
nominal size plus the tolerance value. When packaging, the end of shear
deformation shall be placed in one direction.

Basic Data

Standard ID	GB/T 8731-1988 (GB/T8731-1988)
Description (Translated English)	Free-cutting steel--Technical requirements
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H40
Classification of International Standard	77.080.20
Word Count Estimation	8,897
Date of Issue	2/22/1988
Date of Implementation	3/1/1989
Regulation (derived from)	Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall)
Issuing agency(ies)	National Bureau of Standards