What sheet metal gauge are Triumphs made of

[tdskip]

Hi guys - hope everyone is having a mellow week..

What gauge metal are our Triumphs made from?

Specifically;

Exterior fenders = what gauge metal?
Interior fenders = what gauge metal?
Floor boards = what gauge metal?
Frames = what gauge metal?

Thanks!

 

[Guest]

I measured my original floor boards with a micrometer. It measured out to be 20 gauge. I then measured the Heritage replacement floor board. It measured out to 22 gauge. Somewhat thinner.

 

[tdskip]

Thanks Bill - one down!

Anyone know the gauge of the fenders and/or frame?

 

[Bugeye58]

Tom, here's a chart for you. Just measure and look it up. The first number is regular uncoated steel, 2nd is galvanized, and the third is aluminum. Gauges 3 through 8 have no counterpart in galvanized steel.
Jeff

Gauge (ga)
Standard Steel Thickness (inches)
Galvanized Steel Thickness (inches)
Aluminum Thickness (inches)

3
0.2391

0.2294

4
0.2242

0.2043

5
0.2092

0.1819

6
0.1943

0.1620

7
0.1793

0.1443

8
0.1644

0.1285

9
0.1495
0.1532
0.1144

10
0.1345
0.1382
0.1019

11
0.1196
0.1233
0.0907

12
0.1046
0.1084
0.0808

13
0.0897
0.0934
0.0720

14
0.0747
0.0785
0.0641

15
0.0673
0.0710
0.0571

16
0.0598
0.0635
0.0508

17
0.0538
0.0575
0.0453

18
0.0478
0.0516
0.0403

19
0.0418
0.0456
0.0359

20
0.0359
0.0396
0.0320

21
0.0329
0.0366
0.0285

22
0.0299
0.0336
0.0253

23
0.0269
0.0306
0.0226

24
0.0239
0.0276
0.0201

25
0.0209
0.0247
0.0179

26
0.0179
0.0217
0.0159

27
0.0164
0.0202
0.0142

28
0.0149
0.0187
0.0126

29
0.0135
0.0172
0.0113

30
0.0120
0.0157
0.0100

31
0.0105
0.0142
0.0089

32
0.0097
0.0134
0.0080

33
0.0090

0.0071

34
0.0082

0.0063

35
0.0075

0.0056

36 0.0067
37 0.0064
38
0.0060

 

[tdskip]

Thanks Jeff - I'm going to get proficient at welding darn it!

I've gotten OK at test welding on thicker metal with the cheap-o gas-less MIG, but am going to upgrade to a better machine once I've saved up for it.

This info will help me figure out what bits I can weld with the current machine, which is good up to about 18 gauge....

 

[DougF]

I would practice a lot on thin metals before tackling your repairs. It will save time, frustration and money. If you are replacing the floors or any other panel, practice on it.
Weld around good and rusted areas until you get a feel for it.
If you are not replacing anything, find a similar gauge at a scrap yard.

 

[tdskip]

Thanks Doug - will do.

 

[PeterK]

I converted to a chart for easier (to me) reference. Very handy!

Gauge (ga.) Standard Steel Thickness (inches) Galvanized Steel Thickness (inches) Aluminum Thickness (inches)
3 0.2391 0.2294
4 0.2242 0.2043
5 0.2092 0.1819
6 0.1943 0.1620
7 0.1793 0.1443
8 0.1644 0.1285
9 0.1495 0.1532 0.1144
10 0.1345 0.1382 0.1019
11 0.1196 0.1233 0.0907
12 0.1046 0.1084 0.0808
13 0.0897 0.0934 0.0720
14 0.0747 0.0785 0.0641
15 0.0673 0.0710 0.0571
16 0.0598 0.0635 0.0508
17 0.0538 0.0575 0.0453
18 0.0478 0.0516 0.0403
19 0.0418 0.0456 0.0359
20 0.0359 0.0396 0.0320
21 0.0329 0.0366 0.0285
22 0.0299 0.0336 0.0253
23 0.0269 0.0306 0.0226
24 0.0239 0.0276 0.0201
25 0.0209 0.0247 0.0179
26 0.0179 0.0217 0.0159
27 0.0164 0.0202 0.0142
28 0.0149 0.0187 0.0126
29 0.0135 0.0172 0.0113
30 0.0120 0.0157 0.0100
31 0.0105 0.0142 0.0089
32 0.0097 0.0134 0.0080
33 0.0090 0.0071
34 0.0082 0.0063
35 0.0075 0.0056
36 0.0067
37 0.0064
38 0.0060

 

[Bugeye58]

Here's the direct link to the chart I use.

https://www.unc.edu/~rowlett/units/scales/sheetmetal.html

Jeff

 

[tdskip]

Thanks Jeff!

I just ordered a better MIG welder since the cheap-o flux core once I bought just isn't capable of welding the thinner 20 - 24 gauge that I need for the exterior fenders etc....

Thanks again guys.

 

[Gordo]

I'm not a welder by ANY stretch of the imagination. But I'm trying to teach myself, sometimes with luck sometimes not. What I have found useful are brass heat sinks from Eastwood. I kept blowing through my transmission tunnel on my 3. I bought the sinks in desperation and found they helped me quite a bit and won't try going through that thin stuff again without them.

Gordo

 

[PeterK]

I think they're copper, not brass. I agree, they work well to prevent blow through,