Depth of Decarburization – stud bolt inspection in Anyang Longteng Heat Treatment Material Co.,Ltd

(1)Decarburization of anchor bolts shall be performed by Metallographic  method according to GB/T3098.1 regulations. 

(2)Decarburization of threaded parts shall be performed by metallographic method according to GB/T224-2008 “Determination of depth of decarburization of steels”. 

(3)Specimen shall be taken from longitudinal cross-section of finished anchor bolt products.

Test results shall in accordiance with below Table 

                               Decarburization measurement of anchor bolts 

Decarburization Grade
8.8 10.9
Min Height of partial-decarburization on threads  E 1/2H1 2/3H1
Max Depth of complete decarburization on thread G /mm 0.015
Max Height of partial-decarburization on roots  mm 0.050
Depth of complete decarburization on roots  mm 0.00

 H1 refers to max pitch hight 


Our manufacture have the most advanced facility of heat treatment, with experienced experts and service teams.

Main products :  anchor cage, anchor bolts, template, anchor plate, connect plate, gasket, threaded bars, screwed bars for Wind turbine wind tower foundation, studs, nuts, washers, rock bolts, heat treating round bars, heat treated stirrup, seamless tubes.



Post time: Aug-25-2021