The (first?) Chevy Diesel was a Dud?!? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tigger · 02-24-2006, 10:14 PM

This is all good news, Now I believe the truck is finally going to get some good miles come summer time.
4140 is the grade and contents of a good tool steel. " SPS" means: Stress Proof Steel, It is a good medium carbon steel that can be machined and heat-treated for long wear and durability, depending on the temp you quench it at and the purpose you wish it to perform.
I spent ten years in Ontario's largest Industrial service centre/ Jobbing Shop and sps is a good substitute for generic steel that has little carbon. For example, If you have the notion of making special purpose tools, like body hammers etc. 4140 is the real deal. It is not the highest grade of steel. When colled rolled steel fails, kick it up to sps. There are higher grade steels than sps utilised for stamping and punching operations.
Several years ago I made a collection of body hammers and Dollies (due to their limited supply) out of SPS and they are still going strong and holding up well. There are some images in my yahoo folders if anybody is interested.
Thanks for the great information. Bring on the Suburban, please

Rob Martel

www.robmartel.com
http://photos.yahoo.com/sunbeambob

02-24-2006, 10:14 PM	#26
Tigger Registered User Join Date: Feb 2006 Location: Barrie Ontario Posts: 8	Re: The (first?) Chevy Diesel was a Dud?!? This is all good news, Now I believe the truck is finally going to get some good miles come summer time. 4140 is the grade and contents of a good tool steel. " SPS" means: Stress Proof Steel, It is a good medium carbon steel that can be machined and heat-treated for long wear and durability, depending on the temp you quench it at and the purpose you wish it to perform. I spent ten years in Ontario's largest Industrial service centre/ Jobbing Shop and sps is a good substitute for generic steel that has little carbon. For example, If you have the notion of making special purpose tools, like body hammers etc. 4140 is the real deal. It is not the highest grade of steel. When colled rolled steel fails, kick it up to sps. There are higher grade steels than sps utilised for stamping and punching operations. Several years ago I made a collection of body hammers and Dollies (due to their limited supply) out of SPS and they are still going strong and holding up well. There are some images in my yahoo folders if anybody is interested. Thanks for the great information. Bring on the Suburban, please Rob Martel www.robmartel.com http://photos.yahoo.com/sunbeambob Last edited by Tigger; 02-24-2006 at 11:07 PM.



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