1 5/8 and same wall thickness

 

Depends on which mild steel you are talking about.


.134" wall is 1 lb heavier per foot in 1 5/8"

.120" wall is .75 lb heavier per foot in 1 5/8"?


Same wall is same weight.

 

Isn't moly heavier?

 

If it is the same wall thickness the moly would be heavier due to the density of it. For roll cages you can use .083 moly instead of .134. Our 1-5/8" x .134 erw weighs 2.05lbs per foot. The 1-5/8" x .083 moly is 1.47lbs per foot.

How much does mild steel tubing weight per foot vs chrome moly? Thanks

1 5/8 and same wall thickness

The SAME outside diameter
and the SAME wall thickness...
BOTH weigh EXACTLY the same.

1.625" x .095" wall thickness in 4130 and mild steel weigh
1.552 pounds per foot.

Because 4130 Condition "N" tubing is
stronger in certain respects, it has been
determined that you can use
THINNER tubing in 4130 "N" than mild steel.

THAT is where the weight savings comes into play.

Roughly 1/3 LESS weight for the same amount of tubing.

1.625" od .065" wall weight 1.083#/ft. --- 4130"N"
1.625" od .134' wall weight 2.134#/ft. --- Mild steel DOM

4130"N" MUST be TIG welded.
Mild steel can be MIG or TIG welded.

Your Pal, Gary

 

If it is the same wall thickness the moly would be heavier due to the density of it. For roll cages you can use .083 moly instead of .134. Our 1-5/8" x .134 erw weighs 2.05lbs per foot. The 1-5/8" x .083 moly is 1.47lbs per foot.

 

My thinking was that I have a 89 mustang with a roll cage certified for 8.50 with 1 5/8 mild steel. Wondering if it would be worth it to go to a crome moly 8.50 cage and drop some weight? Thanks

 

It would be helpful to know what wall thickness your mild steel cage is, but you're looking at saving 40-70 pounds.

 

I've always figured about a third less weight with 4130 for frame/cage....only because of thinner tubing.

 

Are you installing it yourself? Can you tig weld? That will probably help you decide. I'm pretty sure CM needs to be tig'd to pass, can someone verify this?

 

CM has to be tig'd

 

Pretty costly to save 40 lbs.
Just replace that big back glass with Lexan and probably loose that much weight and a lot less $$$$$$.

 

That is exactly what I was thinking. Cost more money then what its worth. Just replace the back glass with lexan. Thanks

 

as already said a lot of money to be spent for little savings ...im sure there are other areas you can find the weight difference that wont take a ton of money

 

1-5/8" / .134 wall Mild Steel ERW - 2.134 lb per ft
1-5/8" / .083 wall 4130 Chromoly - 1.367 lb per ft.

(These two sizes are the industry standard for Drag Racing Roll Cage construction)

EXACTLY .767 lb per foot difference

In other words,.....when talking to your buddies,....roughly 3/4 lb per foot

An average 8.50 / 10pt cage is going take about 60ft of tubing to complete,.......
82lbs for Moly
128lbs for Mild Steel

A difference of 46lbs

 

But the value of a car with a Molly roll bar/cage is higher. I Would never buy anything with a mild steel in it

 

But the value of a car with a Molly roll bar/cage is higher.

Whoopi Fucking Do,......

Who gives a Rats Ass,.... unless you plan on going faster than 7.50's.

I Would never buy anything with a mild steel in it

NEVER,.......is a strong word.


If 50lbs of extra weight (due to a M/S cage rather than C/M) is a deal breaker for you,......then you would probably be missing out :roll:

 

I guess my question was would it worth it to cut the MS cage out and Weld in a new CM cage. Looking as some response 46lbs saved wouldn't be worth it to replace verses the cost.

 

Just comes down to personal preference. If the cage you have is nice, and safe, and you're not worried about losing 50lbs. then save the money.

 

Is your current cage nice and certified? Sorry if I missed it

 

Prices posted on steel appear high ? . ---Trevor

http://www.discountsteel.com/items/Electric_Welded_ERW_Round_Steel_Tube.cfm?item_id=201&size_no=93

 

Whoopi Fucking Do,......

Who gives a Rats Ass,.... unless you plan on going faster than 7.50's.



NEVER,.......is a strong word.


If 50lbs of extra weight (due to a M/S cage rather than C/M) is a deal breaker for you,......then you would probably be missing out :roll:

OH No I ment "never"!

 

1-5/8" X .083" MOLY $6.25 a foot

1-5/8" x .134" ERW $3.75 a foot

1-5/8" x .120 DOM $5.00 a foot

We sell only USA or German steel.

 

Hey guys! I saw my name mentioned on this thread, so I thought I would chime in with a comment or two.
I wanted to elaborate on some of the comments.

All steel tubes that are the same OD x wall thickness, regardless of whether they are mild steel, 4130 chrome moly, stainless, or even the new Docol R8, will have the same theoretical weight per foot. The weight savings is when you switch from mild steel to a stronger grade and use a thinner wall thickness.

Now, 4130 is our signature product, and most are aware that we do not sell any Chinese chrome moly. Most of our "race car" sizes are made by Webco Tube, a US mill, and our name is stenciled along the length of the tube. Many of the fill-in sizes could be Webco, Plymouth or Benteler.

ALSO! Presently, we have some special pricing on 4130 tube going on right now.
We have two sizes on overstock - these are sold in full lengths only, and this special is for a limited time (don't know it when it will be pulled)
1.375" OD X .058" $2.05 per foot
1.750" OD X .095" $2.90 per foot

Additionally, we have been able to reduce pricing on our regular stock of 4130 tubes.

Contact me for more information. You should be very pleased.

 

^^^^^^^^^^Dave is who we buy all of our tubing from now^^^^^^^^^^


The customer service is phenomenal !