1010 rivet hardness
1010 rivet hardness
(OP)
I have a requriement for maximum hardness of cold formed aisi 1010 rivets to be 60 HRB. Many of these rivets are very small, 0.020" diameter and 0.125" long. I am not able to consistenly get them to a hardness below 60 HRB.
I have looked at mateiral chemistry variation, tried various cooling cycles/time in my anneal process, and still not consistent success.
Any suggestions????
Thanks.
I have looked at mateiral chemistry variation, tried various cooling cycles/time in my anneal process, and still not consistent success.
Any suggestions????
Thanks.





RE: 1010 rivet hardness
RE: 1010 rivet hardness
Thread330-42174
For SAE 1010, proper spheroidizing produces a tensile strength of around 300 MPa, which is low 50's HRB or around 90 HB. I would investigate the temperature uniformity of your furnace, and the duration of the annealing/spheroidizing cycle. Depending on the degree of cold working involved in forming the rivet, spheroidizing of a low carbon steel like SAE 1010 should not require a cycle as high I mentioned in the above thread. 700 C for only a couple of hours may be sufficient to produce a spheroidized structure. Can you provide details on the time and temperature settings you have used so far?