tincil strength of steel in rails and bridge gerders

[Anonymous]

I thank each and every one of you for your input on this subject,
thank you very much, and have a happy, fun filled, safe and Lord
Blessed 2004 and many more!
Your's Truely,
railwayray

Ray Phelps
Sagle Idaho

LOVE THAT BNSF

[coalminer3]

Relying on my memory again - these are old Bureau of Mines definitions.

Tensile strength - "For ductile metals, tensile strength of a material is usually greater than its breaking strength, but is well below the maximum true stress developed by the material. Tensile strength is a common index for strength comparison of materials. It may be directly useful in design where some plastic deformation is permitted, but yield strength is the common basis for elastic design.." we won't even get into testing of rocks.

Tensile test - "A test in which specimins are subjected to an increasing tensile pull until they fracture."

Girder - "...main beam, usually of steel or reinforced concrete, but may also be of timber."

work safe

US Steel's old book, Making, Shaping and Treating of Steel has lots more. Just don't cast stuff in your yard; it scares the neighbors (LOL)

[Modelcar]

...A bridge constructed across a valley or depression of sort would be anchored down into bedrock below the surface where temperature should not be a factor in rock expansion....

[M636C]

One thing comes to mind, that the steel in rail has to be hard to resist wear, rather than its tensile strength being the main consideration, as for structural steel.

Peter

[PNWRMNM]

Ray,

The answer is no. Steel is produced to grade or specification. Included in the specification will be tensile strength. Presuming the material meets the spec, its strength will exceed the minimum requirement and the strength will be uniform throughout the entire piece of material.

Mac

[Anonymous]

Hi good people,
I was just wondering, Is there any differance in the tincil strength of the rails or
bridge/trestle gerders from one end to the other? Say for instance a bridge
crosses a river and one bank is granet and the other is sand stone and due
to the differant expantion rate of the to types of stone would the tincil
strength in the steel have to compensate?
Thanks for the input,
and please forgive my spelling.

railwayray
Sagle Idaho

LOVE THAT BNSF