What is AISI 3120? 1

[ismengr]

I have tried searching

http://www.matweb.com

with no success to find out what AISI 3120 is. I have sample parts that appear to be investment cast steel, but am being told it is a powder metal, instead. Can any one clear up for me what this material is, and where I may find information.

May your -dv/dt always be small.

 

[TVP]

SAE 3120 is a former SAE that is now listed in SAE J1249. The chemical composition is as follows:

C = 0.17-0.22
Si = 0.20-0.35
Mn = 0.60-0.80
P & S = 0.040 max
Cr = 0.55-0.75
Ni = 1.10-1.40

The date of obsolescence for this grade was 1956. FYI, there are Ni containing powder metal grades, but they would not reference the SAE nomenclature. Cr is not a common alloying element in PM irons and steels.

 

[Rich2001]

Low-Nickel Chrome Steel - SAE 3120

Carbon,
Nominal Range
0.20 0.15-0.25

Manganese
Nominal Range
0.65 0.50-0.80

Nickel
Nominal Range
1.25 1.00-1.50

Chromium
Nominal Range
0.600 0.45-0.75

 

[unclesyd]

AISI 3120 is a low carbon Cr-Ni steel that is not considered a direct hardening grade. It at one time was called a carburizing grade.
C- 0.17-0.22
Mn-.60-.80
P- .040
Si-0.20-.035
Ni-1.10-1.40
Cr-0.55-0.75

Its' well known cousin is AISI 3140 a direct hardening grade.

This material may be made a PM material but I have no information to that probability.