Magazine Springs and Metal Fatigue

Magazine Springs and Metal Fatigue

This is a discussion on Magazine Springs and Metal Fatigue within the Concealed Carry Issues & Discussions forums, part of the Defensive Carry Discussions category; Does anyone know if maintaining full mags over time will cause metal fatigue to the spring?...

Results 1 to 10 of 10

Thread: Magazine Springs and Metal Fatigue

  1. #1
    Member Array jongle's Avatar
    Join Date
    Jun 2006
    Location
    Northern Michigan
    Posts
    106

    Magazine Springs and Metal Fatigue

    Does anyone know if maintaining full mags over time will cause metal fatigue to the spring?


  2. #2
    Member Array JJ573's Avatar
    Join Date
    Aug 2006
    Location
    Arkansas
    Posts
    37
    Only slightly

    If you have new mags that still have stiff springs and you load them up and leave them that way for a coupled days/weeks, you will notice that the spring will lighten up a bit. However, you don't have to worry about it compressing that spring far enough outside of its natural flexible distance to cause any problems.

    Only the action of compressing AND stretching of the spring will actually wear on the spring and cause it to need replacing over time.
    Watch their hands. Hands kill. (In God we trust. Everyone else, keep your hands where I can see them).

  3. #3
    Member Array Gary Crumrine's Avatar
    Join Date
    Jul 2006
    Location
    New York, NY
    Posts
    53
    Friends,

    I've kept magazines (Colt / Glock) fully charged for - sometimes - 10years or more without difficulties.

    Cordially,
    Gary Crumrine

  4. #4
    VIP Member Array pogo2's Avatar
    Join Date
    May 2006
    Location
    Southwest
    Posts
    3,150

    Definition of metal fatigue

    Metal fatigue is defined as "A weakening and then breakdown of metal parts caused by constant flexing". The number of cycles of back and forth stress to reach fatigue failure can be in the millions, and depends on the part and the material.

    So I don't thing a magazine loaded and left for a long time will fail due to spring fatigue. That is only 1/2 of a cycle.

  5. #5
    Administrator
    Array QKShooter's Avatar
    Join Date
    Dec 2004
    Location
    Off Of The X
    Posts
    35,903

    Post

    I opened a thread topic on this a while back.

    CLICK HERE TO VIEW THAT THREAD.

  6. #6
    Member Array gotammo's Avatar
    Join Date
    May 2006
    Location
    CT
    Posts
    443
    the manfacturer takes this into acount when they design the mag. and spring their made to be loaded, load'm' up and don't worry they will work when needed.

  7. #7
    Member Array sengie's Avatar
    Join Date
    Jul 2006
    Location
    drexel hill,pa
    Posts
    29
    If in doubt, rotate

  8. #8
    Assistant Administrator
    Array P95Carry's Avatar
    Join Date
    Mar 2005
    Location
    South West PA
    Posts
    25,484
    If in doubt, rotate
    I would agree - seeing as there is no harm in it!!

    Metal fatigue is generally a term used to attribute failure to metals - work hardening, chrystalization - failure due to inclusions, voids, poor heat treatment etc.

    A spring works thru torsion - and IMO a spring from brand new when left compressed will almost inevitably take a small (but measurable) ''set''. Once that has occurred the life will these days be long and consistent.

    I have two of three SIG 10 rounders which would barely take #10 round - they now thru use (which includes effects of cycling - compression/release) take that last round a bit more easily - and they were left fully loaded for quite some while.

    I am of the opinion too that the 8 round 1911 mags are a tad more likely to ''tire'' than 7's (when full) - because the spring might be made of slightly thinner material - as well as the follower being perhaps slightly modified. The spring has a limited space to compress in. Might be quite marginal tho.

    OTOH - a large mag like one for an AK - has such a long spring that as I have proved - will function OK after staying fully charged for well over a year. Not so sure with my FAL mag's - and rotate those coupla times a year.

    Mag springs are in a category of their own - as the torsion occurs very locally at each tight bend - the straight sections contribute little at all - and so force is well concentrated at these points - which is why I do think a small ''set'' can and will occur - but for many, barely noticeable.

    I should add that in fact - tho most of our handgun mag springs work in torsion - I have remembered some mags like in SKS and Enfields, where the action is actually flexion - these being more convoluted ''leaf'' in design.

    Can't say so far my SIG 15's have been noticeably altered thru being left full - but as I said - no harm, no foul - if some rotation applied - it can't hurt a bit!!
    Chris - P95
    NRA Certified Instructor & NRA Life Member.

    "To own a gun and assume that you are armed
    is like owning a piano and assuming that you are a musician!."


    http://www.rkba-2a.com/ - a portal for 2A links, articles and some videos.

  9. #9
    Member Array Bando's Avatar
    Join Date
    Aug 2006
    Location
    Texas somewhere
    Posts
    466
    Man, I read this great article on this very thing a couple months back. It said not to worry about it, that spring metal is meant to be flexed and is good for quite some time, as long as it isn't pushed out of it's normal range. Like cramming in an extra round, or streching a spring for more tension. Ohh, the thought makes me shudder....
    The Problem: When stupid people do stupid things, smart people end up getting killed.

  10. #10
    Distinguished Member Array AutoFan's Avatar
    Join Date
    Mar 2005
    Location
    Arid Zone A
    Posts
    1,563
    The springs will weaken due to the loading and unloading, so if you are really worried, don't cycle the magazines. Or better yet, just replace the springs on a regular basis, like all the other springs in your gun.

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Magazine Springs
    By Philly Boy in forum General Firearm Discussion
    Replies: 6
    Last Post: February 6th, 2011, 06:57 PM
  2. magazine springs
    By blaise in forum General Firearm Discussion
    Replies: 7
    Last Post: March 16th, 2008, 11:30 AM
  3. Carry fatigue
    By ExactlyMyPoint in forum Defensive Carry Holsters & Carry Options
    Replies: 26
    Last Post: February 12th, 2008, 09:16 PM
  4. shotgun magazine spring fatigue
    By Lugin in forum Defensive Rifles & Shotgun Discussion
    Replies: 4
    Last Post: June 30th, 2006, 01:39 AM
  5. Let's Talk About Magazine Springs
    By QKShooter in forum Related Gear & Equipment
    Replies: 16
    Last Post: September 13th, 2005, 12:06 AM

Search tags for this page

handgun magazine spring fatigue
,
magazine fatigue
,

magazine spring fatigue

,
magazine springs fatigue
,
metal fatigue in springs
,
metal spring fatigue
,
pistol magazine spring fatigue
,
spring fatigue in magazines
,
spring fatigue magazine
,
spring metal fatigue
,
stretch magazine spring
,
what causes spring fatigue
Click on a term to search for related topics.