Fordmods Logo

about to attempt my very first head gasket! 

 

Page 2 of 2 [ 16 posts ] Go to page Previous  1, 2

 
 Post subject: Re: about to attempt my very first head gasket!
Posted: Tue Nov 27, 2012 6:05 pm 
Tyre Shredder
Offline
User avatar

Age: 49

Posts: 391

Joined: 22nd Aug 2008

Ride: 2002 AUII Fairlane Sportsman V8

Location: Roxby Downs
SA, Australia

chicho11 wrote:
http://www.engineeringtoolbox.com/thermal-expansion-metals-d_859.html

High and Low Thermal Expansion Steels
There are cases in engine construction where steel has to work in conjunction with light alloys, such as cylinder-head bolts, valve seating, or cylinder liners in aero engines. The comparatively high thermal expansivity of aluminium leads to looseness unless the steel has a similar coefficient of expansion. The austenitic steel of the following composition

C, 0,59; Ni, 12; Mn, 5,1; Cr, 3,4

has a thermal expansion of 0,000021 per degree C up to 400°C, which is only slightly lower than that of aluminium, and it combines good mechanical properties with resistance to abrasion.
Cold rolled austenitic stainless steel is another alternative. Where an abnormally low coefficient of expansion is required, Inver, containing 36% Ni, is used.

Ball-race steel. A typical composition is C, 1,0; Mn, 0,5; Cr, 1,36%. After quenching in oil from 810°C the steel is usually tempered at 100-200°C to
a) reduce hardening stresses,
b) reduce cracks in grinding.
Tempering at 100°C also increases the hardness slightly, e.g.:

Tempering temperature nil 100 200 250 VPN 800 876 750 736

so whats all that mean in a nutshell?
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 2 of 2  [ 16 posts ]  Go to page Previous  1, 2

Who is online

Users browsing this forum: No registered users and 68 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Sun Nov 24, 2024 3:55 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names