GB/T 21469-2008: Machining allowances and tolerances for steel open die forgings on hammer -- General requirement

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Scope

This standard specifies the general requirements for the machining allowances and
tolerances of steel open die forgings on hammer and their use.
This standard applies to open die forgings of carbon steel and alloy steel with a carbon
content not exceeding 0.9% and a total content of other alloy components not exceeding
4%.
For open die forgings that exceed the scope specified in this standard, the machining
allowance and tolerance shall be determined by the supplier and the buyer through
separate negotiation.

Basic Data

Standard ID	GB/T 21469-2008 (GB/T21469-2008)
Description (Translated English)	Machining allowances and tolerances for steel open die forgings on hammer -- General requirement
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J32
Classification of International Standard	77.140.85
Word Count Estimation	5,562
Date of Issue	2008-02-28
Date of Implementation	2008-08-01
Older Standard (superseded by this standard)	GB/T 15826.1-1995
Quoted Standard	GB/T 8541
Regulation (derived from)	National Standard Approval Announcement 2008 No.3 (Total No.116)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the general requirements for the hammer steel forgings mechanical allowances and tolerances for its use. This standard applies to open die forgings up to 0. 9% carbon content and other alloying elements does not exceed 4% of the total content of carbon steel and alloy steel. Where beyond the scope of this standard forgings, mechanical allowances and tolerances be negotiated by both parties.