CLK 230K Weight?

[230KOMPRESSOR]

Just a quick one! Any body know the weight of a standard 230clk in KG's please?

Thanks Ell

 

[Howard]

In your handbook.

 

[BlackC55]

.... and on the b pillar sticker.

 

[230KOMPRESSOR]

Thank you and thank you I will check tomorrow.

 

[flango]

Pre face lift 1425 Kg Post Facelift 1345 Kg IIRC

 

[Howard]

Interesting , my handbook only says 1425 ....

Why is the facelift lighter ?

 

[wemorgan]

It's not so uncommon for cars to become lighter over their production cycle due to mass/cost/process optimisation, but 80kg is an awful lot. Were there fewer standard options on the post facelift models?

 

[flango]

I have the answer to that somewhere. IIRC think it is something to do with the body panel thickness and steel spec and the reason pre face lifts don't rust as bad as post face lifts. Will look it up in my collection of useless MB trivia and post back

 

[wemorgan]

A body-in-white (bare body shell) is about 1/3 of a total vehicle mass. So for the CLK that's 470kg. Panel down gauging rarely goes more than 10% and that's never on 100% of the parts. So purely speculating here, but I suspect other factors will also account for the mass reduction; fuel tank size, wheels, std. options.

 

[flango]

A body-in-white (bare body shell) is about 1/3 of a total vehicle mass. So for the CLK that's 470kg. Panel down gauging rarely goes more than 10% and that's never on 100% of the parts. So purely speculating here, but I suspect other factors will also account for the mass reduction; fuel tank size, wheels, std. options.

I seem to think it was about a steel spec change so maybe density was involved rather than thickness or gauge? will have a look this evening for the article.

 

[wemorgan]

Sadly all steels are of roughly the same density. It's only really strength that changes.

 

[flango]

Sadly all steels are of roughly the same density. It's only really strength that changes.

Speaking as a qualified metallurgist the density of steel can range from 7.45 to 8.05 so that's an 8% differential. You start adding tungsten chrome or manganese in there even in small amounts and the density soon increases.

Plain bog standard mild steel normally used on car body panels has a density of 7.75. Although for Mechanical engineering Calculations a standard of 7.8 is the accepted figure internationally for plain mild steel.

Still not found the article and it's bugging me now

 

[wemorgan]

Interesting, I never realised the variation could be so large. Though the steels I use are 98% iron which has a similar density (<10%) to chromium and manganese. Carbon is however a lot lighter, but the content in automotive body steel grades is very low at <0.2%. Generally all the steel grades I've seen used in automotive body-in-whites have a density range from 7.75 to 7.89. That includes mild steels to ultra high strength steels.

Docol DC06, density 7.87 http://www.matweb.com/search/DataSheet.aspx?MatGUID=7665713c3d1f4f99ac923b3c107f6884

Docol 220YP, density 7.87 http://www.matweb.com/search/DataSheet.aspx?MatGUID=076712d3b1ce4c8e9ae381828bc5b494&ckck=1

Docol 1000YP, density 7.87 http://www.matweb.com/search/DataSheet.aspx?MatGUID=baf508af0c994b2ebb311bfda45d773a

Maybe steel grades are more exotic outside of the automotive world?

 

[flango]

I could be completely wrong on the density thing as the reason, just wish I could find that bl**dy article. Look like going in the loft this evening as it is really bugging me

 

[230KOMPRESSOR]

Bet you are all glad i asked this question now!

 

[wemorgan]

Sorry. Didn't mean to distract from your OP as much as I did. It was just an interesting topic for me.

 

[flango]

Sorry. Didn't mean to distract from your OP as much as I did. It was just an interesting topic for me.

No its an interesting subject, Just had dinner will go in the loft shortly

 

[Sonny Burnett]

No its an interesting subject, Just had dinner will go in the loft shortly

calm down mate it xmas... dont have a few drinks first before you go messing about in the loft...

 

[230KOMPRESSOR]

No im really enjoying this topic! Find it most ammusing that Flanaia1 will be off to the loft shortly

 

[flango]

No im really enjoying this topic! Find it most ammusing that Flanaia1 will be off to the loft shortly

I hate not being able to remember the reason for something when I know I have read it and you would not believe the amount of car related info I have, used to keep it in my office but when SWMBO started using it too my car stuff was relegated to the loft, now I have to fall over ornaments we never used, my daughters cuddly toys from the year dot and SWMBO old clothes that she never gets round to taking to the charity shop before I can get to my car stuff

Just sipping on a nice Shiraz and trying to muster up the enthusiasm to climb the loft ladder