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RockCrusher
Samba Member
Joined: August 03, 2010
Posts: 4596
Location: Parkesburg, PA
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 Posted: Thu Jun 09, 2011 10:13 am Post subject: |
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I would bet on 11:00 o'clock
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[email protected] Please use email for all general inquiries.
I will be happy to speak to anyone who has a serious inquiry (meaning real potential business for RC enterprises) or a parts order. Due to machining noise causing missed calls all calls will be returned promptly. |
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DarthWeber
Samba Member
Joined: November 24, 2007
Posts: 7543
Location: Whittier,CA
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| Posted: Thu Jun 09, 2011 10:56 am Post subject: |
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 that's past Mark's bedtime. |
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vugbug68
Samba Member
Joined: June 25, 2006
Posts: 2701
Location: sacramento
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modok
Samba Member
Joined: October 30, 2009
Posts: 27726
Location: Colorado Springs
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| Posted: Fri Jun 10, 2011 2:04 am Post subject: |
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You want the long answer?
search for all posts by "jimmy111"
containing the term"as-21"
His research lines up with what I have observed on used cases and what I have read about these alloys.
In summary, as-21 has 10% better resistance to cracks, but 10% lower strength and hardness. It has better creep resistance at high temps. It is also more difficult to cast because it does not flow easily. |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15601
Location: Deep in the 405
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| Posted: Fri Jun 10, 2011 2:21 pm Post subject: |
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AS stands for the Aluminum and Silicone content of the Magnesium alloy.
AS21 = 2% Aluminum and 1% Silicone
AS41 = 4% Aluminum and 1% Silicone
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK |
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Csaba
Samba Member
Joined: February 28, 2005
Posts: 30
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| Posted: Fri Jun 10, 2011 3:24 pm Post subject: |
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| DarthWeber wrote: |
| I believe it was 1045?? |
More like a 0.2 carbon than 0.4. Even though the original german cranks were forged, they were not made of anything exotic.
A forged version of your garden variety 1025 carbon steel industrial shaft material. |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23947
Location: SHALIMAR ,FLORIDA
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| Posted: Fri Jun 10, 2011 3:35 pm Post subject: |
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| Csaba wrote: |
| DarthWeber wrote: |
| I believe it was 1045?? |
More like a 0.2 carbon than 0.4. Even though the original german cranks were forged, they were not made of anything exotic.
A forged version of your garden variety 1025 carbon steel industrial shaft material. |
well there the softest cranks I have ever seen.and I seen a lot in 50+ years. |
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modok
Samba Member
Joined: October 30, 2009
Posts: 27726
Location: Colorado Springs
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| Posted: Fri Jun 10, 2011 5:13 pm Post subject: |
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| you never seen a corvair crank? |
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Bruce
Samba Member
Joined: May 16, 2003
Posts: 17634
Location: Left coast, Canada
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| Posted: Fri Jun 10, 2011 11:04 pm Post subject: |
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| vwracerdave wrote: |
AS stands for the Aluminum and Silicone content of the Magnesium alloy.
AS21 = 2% Aluminum and 1% Silicone
AS41 = 4% Aluminum and 1% Silicone |
Close.
Silicone is what you use to seal your bathtub. Silicon is the element used in the engine case alloy.
Ironically, there is no silicon in silicone.
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| overheard at the portland Swap Meet... wrote: |
| ..... a steering wheel made from a mastadon tusk..... |
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vugbug68
Samba Member
Joined: June 25, 2006
Posts: 2701
Location: sacramento
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| Posted: Sat Jun 11, 2011 1:02 am Post subject: |
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| modok wrote: |
| you never seen a corvair crank? |
I have!
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71 Super
66 Corvair
69 Baja Bug |
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modok
Samba Member
Joined: October 30, 2009
Posts: 27726
Location: Colorado Springs
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| Posted: Sat Jun 11, 2011 1:15 am Post subject: |
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hahaha!
what wwere we talking about?
oh yeah
One time I was straighteneing one of those
I gave it 8 hits and that was enough to bend it clear the other direction worse than it was to begin with. OOPs
Pretty soft
Maybe the point was that sometimes things being super hard and strong is not the most important thing in how good stuff holds up
these mild steel cranks and as-21 are SOFTer than the usual establishment, but they live longer, kinda like YOUTH |
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vugbug68
Samba Member
Joined: June 25, 2006
Posts: 2701
Location: sacramento
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| Posted: Sat Jun 11, 2011 7:24 am Post subject: |
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Yep! by the way I found that post by jimmy111 that i was looking for about the case differences, I tried searching before and came up empty. I knew there was one on here but i couldn't remember who started it, anyway thanks modok!
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71 Super
66 Corvair
69 Baja Bug |
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