GB/T 5216-2004 Guaranteed hardenability structural steel

This standard specifies the dimensions, shape, weight and permissible deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of hot-rolled and hot-forged structural steels with guaranteed hardenability. This standard applies to hot-rolled and hot-forged structural steel bars with guaranteed hardenability and a diameter or thickness of not less than 30 mm for machinery manufacturing. The hardenability of steel is measured by the end quenching method or calculated by the formula. GB/T 5216-2004 Guaranteed Hardenability Structural Steel GB/T5216-2004 Standard download decompression password: www.bzxz.net

National Standard Amendment Notice
Standard Announcement
China Standardization
GB/T5216-2004 "Ensure Hardenability Structural Steel" National Standard No. 1 Amendment CASbZxz.net
This amendment was approved by the National Standardization Committee on December 27, 2001 with the document No. 75 of National Standard No. 1 (2004), and will be implemented on May 1, 2005. Standard name: GB/T5216-2004 "Ensure Hardenability Structural Steel" The carbon content of 15CrMoH grade (serial number 15) in Table 1 is changed from 0.17%-0.23% to 0.12%0.18%. Published in the 3rd issue of "China Standardization" in 2005
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