AISI 1045 composition

[bgstic]

I've got a mill cert for 1045 steel with a 100 ksi yield, I'm trying to figure out what they've done to get that high a yield. I think they may have dual-certified a 1050 steel as 1045. The composition shows 0.080 NI, 0.090 V, and 0.020 MO. I didn't think these quantities of these elements were found in such a common steel.

 

[CoryPad]

Standards like ASTM A 29 and SAE J403 do not specify compositions for Ni, V, and Mo. You can expect higher concentrations of elements like these if the steel comes from a mini-mill that uses mostly recycled scrap.

ASTM A 29 has a note regarding alloy steels:

NOTE 1—Small quantities of certain elements are present in alloy steels which are not specified or required. These elements are considered as incidental and may be present to the following maximum amounts: copper, 0.35 %; nickel, 0.25 %; chromium, 0.20 % and molybdenum, 0.06 %.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[TVP]

Cold-drawn 1045 that has been grain-refined with V can easily achieve a yield strength of 100 ksi. The reduction during cold-drawing would be ~ 15-25%.

 

[dbooker630]

I agree with TVP that this looks like a vanadium grain-refined material. The .08 nickel and .02 moly levels are not uncommon.

 

[Flesh]

Could be,
ASTM A311 cold drawn stress relieved, 1045, Class B (heavy draft).
or,
ASTM A920 Microalloy, 10V45 (0.01-0.30 Mo, 0.02-0.20 V), Class 100; Al, Si, Ti, N, and Cb should be reported though.