Material properties for AISI 1045 steel
Material properties for AISI 1045 steel
(OP)
I have the following data for some AISI 1045 steel bar stock I have.
Heat number C39764
hardness 248 BHN
I need the material properties such as Fsu, Fcy, etc
I can't find it in my normal reference, MIL-hndbk-5.
Thanks!
Heat number C39764
hardness 248 BHN
I need the material properties such as Fsu, Fcy, etc
I can't find it in my normal reference, MIL-hndbk-5.
Thanks!





RE: Material properties for AISI 1045 steel
RE: Material properties for AISI 1045 steel
RE: Material properties for AISI 1045 steel
The “hardness 248 BHN” (if done with a 10-mm ball and 3000 kgf load) is approximately equal to HRC 24 or VHN 261 and indicates an approximate tensile strength of 120 ksi. – from ASTM A370.
There are 13 listings for 1045 steel at www.matweb.com, but none closely match yours (and none for Q & T condition).
Without both the mechanical and thermal history, the properties are rather undefined.
From the hardness, which is well below the maximum hardness (about HRC 58) possible with this alloy, a wild guess is hot-rolled material of ~80 ksi yield stress and ~20% elongation. Perhaps, this is material meant to be heat treated after machining.
RE: Material properties for AISI 1045 steel
One other thing as 1045 is not considered a through hardening steel, i.e. the reason for the induction hardening label. This make determining the physical properties a little more difficult.
If I remember correctly the bar (2") we used for shafting was supplied as CR, Q, oil, T @ 1000°F. After machining our material was induction hardened in the bearing areas.
If you can't backtrack the heat number to an MTR or the material is going into a critical component I would scrap it and start anew with a known material. Connecting to an MTR isn’t as hard as it once was because so many suppliers have the data online. If you know who your supplier was put the burden on his back as he has the knowhow and means to track the material.
The only other alternative, if not for a critical part, is to Normalize and Heat treat to a known condition then derive you require data (estimated) from the final hardness. This again is tricky as the material isn't a through hardening steel.
RE: Material properties for AISI 1045 steel