Material Properties 4140/SPS 3

[izzy123]

I have a Canadian drawing that specifies the material to be 4140/sps. I am in Australia and we are manufacturing the component and were wondering what the sps refers to.
Our 4140 grades are only single digit letters, ie: 4140 T. Can anyone help?

 

[Metalguy]

Hmm, only sps I know is SPS (Standard Pressed Steel) in PA. They all kinds of good fasteners.

 

[kenvlach]

See Alloy Steel Nearest Equivalents at

http://shopswarf.orcon.net.nz/steelequiv.html

SPS seems to be just the designation of Atlas (Atlas Specialty Steels?) for 4140. Can't find much on Atlas' website (

http://www.slater.com/stainless/index.htm)

 

[Carburize]

Does the drawing indicate any hardness or other properties?

 

[TVP]

There might be more information on the Atlas Specialty Metals website:

http://www.atlas-steels.com.au/

 

[kenvlach]

I guessed the Atlas in Canada, since a Canadian blueprint.
But, the website listing is New Zealand, so the Atlas in Australia is certainly a candidate.
Ken

 

[izzy123]

Thank you all very much.
The 'sps' was related to Atlas Specialty Steels in Canada.
It is an old coding (not used any more) & standard 4140 T is the same as 4140/sps.