GB/T 21470-2008
Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves (English Version)

Standard No.

GB/T 21470-2008

Language

Chinese, Available in English version

Release Date

2008

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 21470-2008

Replace

GB/T 15826.5-1995 GB/T 15826.4-1995 GB/T 15826.3-1995 GB/T 15826.2-1995

Scope

This standard specifies the machining allowances and tolerances for various free forgings such as discs, columns, discs with holes, rings and sleeves. This standard applies to free 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 free forgings beyond the scope specified in this standard, the remaining quantity and tolerance shall be determined through negotiation between the supplier and the buyer.

GB/T 21470-2008 Referenced Document

• GB/T 21469 Machining allowances and tolerances for steel open die forgings on hammer.General requirement
• JB/T 9179.4 Machining allowances and tolerances of open die forgings on hydraulic press.Part 4: Disk and punched hole*， 2013-12-31 Update
• JB/T 9179.5 Machining allowances and tolerances of open die forgings on hydraulic press.Part 5: Short round shaft*， 2013-12-31 Update
• JB/T 9179.7 Machining allowances and tolerances of open die forgings on hydraulic press.Part 7: Cylinder*， 2013-12-31 Update
• JB/T 9179.8 Machining allowances and tolerances of open die forgings on hydraulic press.Part 8: Ring, cylinder segment and flange*， 2013-12-31 Update

GB/T 21470-2008 history

• 2008 GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves
• 1995 GB/T 15826.2-1995 Machining allowances and tolerances for steel open die forgings on hammer--Disks and columns

GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves has been changed from GB/T 15826.5-1995 Machining allowances and tolerances for steel open die forgings on hammer--Seamles cylinder hushings.

GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves has been changed from GB/T 15826.4-1995 Machining allowances and tolerances for steel open die forgings on hammer--Rings.

GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves has been changed from GB/T 15826.3-1995 Machining allowances and tolerances for steel open die forgings on hammer--Disks with holes.

GB/T 21470-2008 Machining allowances and tolerances for steel open die forgings on hammer.Disks,columns,rings and seamless cylindrical sleeves has been changed from GB/T 15826.2-1995 Machining allowances and tolerances for steel open die forgings on hammer--Disks and columns.