AISI 4140 18-22 HRc

[blckwtr]

Does anyone have available stress-strain data for AISI 4140 18-22 bolt, dimension between 10 and 100 mm ? Please, it would be very helpful for me to have some non-linear data to implement in my preliminary analysis. The steel suppliers doesn't have this information available... I have tried to search the internet...

Best Regards

--Tommy--

 

[unclesyd]

Is your material annealed or tempered above 1200°F?

 

[blckwtr]

It's NACE approved, but don't know what heat treatment is used... Think it is annealed at 815°C (1500°F) furnace cooled 11°C (20°F)/hour to 665°C (1230°F), air cooled, but not sure...

AISI 4140 (~42CrMo4 / SIS 2244 / 42CD4)
Rolled Bar Heat Treated and Tested
18-22 HRC (207-235 BHN), 80K min yield, NACE MR0175 & API 6A PSL3.
Size Range:- Ø32mm to Ø290mm

I also notice the hardness is specified in Brinell on the above, while the "correct" or at least most commmonly used is Rockwell C...

Does this help?

 

[metengr]

blckwtr;
Just curious, as to why do you need a tensile stress strain curve for this steel? For typical service applications, you should be designing to below the minimum tensile yield strength for this material, otherwise you will have plastic deformation.

 

[blckwtr]

In extreme cases such as testing, there may be that we exceed yield strength in certain small volumes of parts. In a "normal" load siuation the stress limit goes up to, but not over the plastic limit, since the design and surroundings doesn't allow building it large enough or using other non-NACE materials which is stronger, sometimes we have to go to limits. We have the possibility to use the yield criterion for failure and analyzing the stress levels non-linearly. Either way, verified by testing in advance and documenting the "normal" load scenario.

 

[unclesyd]

Here a little information on the IDAC database that may have the information you require

http://www.idac.co.uk/services/materialdatabase.htm