Just wondering what this means.
Is it a standard case and how do you decifer the code.
Does the 41 mean anything??
Cheers
Dave
57kombi Hannover Elder
2,544 posts · joined Aug 2002 ·
What is an AS41 case
splitbusaustralia Wolfsburg Wizard
487 posts · joined Aug 2002 ·
From the ASM Metals Handbook, V.2, 10th edition, 1990
Room Temperature properties:
AS21
1.7% Al
0.4% Mn
1.1% Si
240 MPa Tensile Strength
130 MPa Tensile Yield Strength
130 MPa Compressive Yield Strength
AS41
4.3% Al
0.35% Mn
1.0% Si
220 MPa Tensile Strength
150 MPa Tensile Yield Strength
150 MPa Compressive Yield Strength
AS41 generally considered the 'better' case because
of the higher aluminium content (all dual relief too).
Room Temperature properties:
AS21
1.7% Al
0.4% Mn
1.1% Si
240 MPa Tensile Strength
130 MPa Tensile Yield Strength
130 MPa Compressive Yield Strength
AS41
4.3% Al
0.35% Mn
1.0% Si
220 MPa Tensile Strength
150 MPa Tensile Yield Strength
150 MPa Compressive Yield Strength
AS41 generally considered the 'better' case because
of the higher aluminium content (all dual relief too).
57kombi Hannover Elder
2,544 posts · joined Aug 2002 ·
Thanks Rob.
Now I know what I've got.
Cheers
Dave
Now I know what I've got.
Cheers
Dave
Bizarre Moderator The artist formerly known as blue74l
12,789 posts · joined Aug 2002 ·
ummm... have i been wrong all these years :jesussplitbusaustralia wrote:AS41 generally considered the 'better' case because
of the higher aluminium content (all dual relief too).
I "thought" AS21 was the high alum case
I "thought" AS 41 was the garden variety
Futue te ipsum!!!
71superbug The Itch Itcher
1,184 posts · joined May 2004 ·
looks like you were bizarre.
1.7% for as21 and 4.3% for as41....hmm. thats gotta suck. did u buy the wrong one at anytime? HAHAH
Anthony
1.7% for as21 and 4.3% for as41....hmm. thats gotta suck. did u buy the wrong one at anytime? HAHAH
Anthony
VWFOOL King for a day, Fool for a lifetime.
3,436 posts · joined Sep 2002 ·
how do u know which one u hav, is it stamped anywhere?
++++++++++++++++++++++++++++
One man's junk...
One man's junk...
Bizarre Moderator The artist formerly known as blue74l
12,789 posts · joined Aug 2002 ·
This is what i meant
"FI Beetle engines (`75 and later) don't have any provision for a mechanical fuel pump but the alloy they're made of (AS21) is better than the original AS41 and a close second IMO to the AS41 used on new cases"
http://www.shoptalkforums.com/viewtopic.php?t=77732&highlight=as21
and
http://www.shoptalkforums.com/viewtopic.php?t=79610&highlight=as21
here are some more points
http://www.shoptalkforums.com/search.php?mode=results
The first 1600 case was AS41
Then the AS 21 came out in 75 - ish but doesnt have provision for a mech fuel pump and was always considered a "better" case. It was "stronger" - i thought that meant more Al
Apparently the new cases are designated AS41 - but made of AS41A.
I dont know if there is a difference between AS41 and AS41A
What i am saying is i will bet pounds to a pig the AS41 Dave has is a garden variety AS41 from the early 70's and i would have the AS21 anyday over that
"FI Beetle engines (`75 and later) don't have any provision for a mechanical fuel pump but the alloy they're made of (AS21) is better than the original AS41 and a close second IMO to the AS41 used on new cases"
http://www.shoptalkforums.com/viewtopic.php?t=77732&highlight=as21
and
http://www.shoptalkforums.com/viewtopic.php?t=79610&highlight=as21
here are some more points
http://www.shoptalkforums.com/search.php?mode=results
The first 1600 case was AS41
Then the AS 21 came out in 75 - ish but doesnt have provision for a mech fuel pump and was always considered a "better" case. It was "stronger" - i thought that meant more Al
Apparently the new cases are designated AS41 - but made of AS41A.
I dont know if there is a difference between AS41 and AS41A
What i am saying is i will bet pounds to a pig the AS41 Dave has is a garden variety AS41 from the early 70's and i would have the AS21 anyday over that
Futue te ipsum!!!
Bizarre Moderator The artist formerly known as blue74l
12,789 posts · joined Aug 2002 ·
it is stamped under the pushrod tubes on one of the sides - driver i think
Futue te ipsum!!!
BajaChris Commited Dubber
62 posts · joined Jul 2004 ·
This is from a web page I found a while ago.
Click here to see the rest of the page.
It seems that the AS-21 is the better case unless you have a new brazilian case.On the side of the case, you will see the letters "AS-41" or "AS-21" The AS-41 was the first ones made. In 1975 and later fuel injected engines (the ones without a fuel pump hole), the case alloy was change and the letter was AS-21. The AS-21 is better then the AS-41. BUT now VW in Brazil has changed again and went to the AS-41 again, but it is of a different alloy then the older AS-41 and AS-21 and is better than both.
Click here to see the rest of the page.
koolkarmakombi enkarmarising
2,078 posts · joined Jun 2003 ·
so that percent adds up to 5.65%
whats the rest?
whats the rest?
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BajaChris Commited Dubber
62 posts · joined Jul 2004 ·
magnesium
Bizarre Moderator The artist formerly known as blue74l
12,789 posts · joined Aug 2002 ·
From the ASM Metals Handbook, V.2, 10th edition, 1990
Room Temperature properties (Al=Aluminum, Mn=Magnesium, Si=Silicon):
AS21:
1.7% Al
.4% Mn
1.1% Si
240 MPa Tensile Strength
130 MPa Tensile Yield Strength
130 MPa Compressive Yield Strength
AS41A:
4.3% Al
.35% Mn
1.0% Si
220 MPa Tensile Strength
150 MPa Tensile Yield Strength
150 MPa Compressive Yield Strength
That is the same table as Rob's but it is AS41A - i wonder if Rob missed the A
Where is Wes when ya want him???
Wes....Wes....where are you......WES!!!
Room Temperature properties (Al=Aluminum, Mn=Magnesium, Si=Silicon):
AS21:
1.7% Al
.4% Mn
1.1% Si
240 MPa Tensile Strength
130 MPa Tensile Yield Strength
130 MPa Compressive Yield Strength
AS41A:
4.3% Al
.35% Mn
1.0% Si
220 MPa Tensile Strength
150 MPa Tensile Yield Strength
150 MPa Compressive Yield Strength
That is the same table as Rob's but it is AS41A - i wonder if Rob missed the A
Where is Wes when ya want him???
Wes....Wes....where are you......WES!!!
Futue te ipsum!!!
splitbusaustralia Wolfsburg Wizard
487 posts · joined Aug 2002 ·
sorry! - that is correct the 1990 figures are the 'late' (dual relief) AS41(A) cases!
regards
RobK
regards
RobK
aussiebug Officially Full-On Dubber
246 posts · joined Sep 2002 ·
Sorry Bizarre, but you have it wrong.Bizarre wrote:From the ASM Metals Handbook, V.2, 10th edition, 1990
Room Temperature properties (Al=Aluminum, Mn=Magnesium, Si=Silicon):
Mn is Manganese (the .35% etc)
Mg is magnesium and isn't mentioned in your list, but is of course the main ingredient of the VW case, whether it's an AS21 or AS41 case.
Rob
Rob and Dave's aircooled VW pages
Repairs and maintenance for the home mechanic
http://www.vw-resource.com
Rob and Dave's aircooled VW pages
Repairs and maintenance for the home mechanic
http://www.vw-resource.com
Bizarre Moderator The artist formerly known as blue74l
12,789 posts · joined Aug 2002 ·
Rob?......... Rob?????................................hmmmmmm........does any one remember Rob???
Welcome back!
Long time no hear!
Been plugging ya site while ya been busy
Welcome back!
Long time no hear!
Been plugging ya site while ya been busy
Futue te ipsum!!!
Bizarre Moderator The artist formerly known as blue74l
12,789 posts · joined Aug 2002 ·
Rob?......... Rob?????................................hmmmmmm........does any one remember Rob???
Welcome back!
Long time no hear!
Been plugging ya site while ya been busy
Welcome back!
Long time no hear!
Been plugging ya site while ya been busy
Futue te ipsum!!!