My dumb question for the day AR 400 vs mild

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How much stronger as in resist bending is  AR 400 vs mild steel if any. I've never used AR for anything before but may have a future project that could benefit from it, if it is stronger. Thanks. Mike
Reply:AR400 is a wear resistant material but the hardness is only a few thousands deep on either side of the sheet, if you're looking for increased strength look at the  A516 family they are used in pressure vessels also look at the A572 family they are used in bridge and structural members along with fabricated crane hooks of odd design.  By family i am referring to the sub grades of those alloys.Last edited by colindstark; 03-29-2016 at 10:32 PM.
Reply:ar400 will resist bending to the point that no shops local to me will do it. its also brittle and would likley break.     it is built for abrasion and not structural, used in dump truck bed linersi believe a-656 has similar strength to ar400, but it is easliy bendable.    this is what i use to lengthen semi-truck frames
Reply:Originally Posted by tracymobilecncar400 will resist bending to the point that no shops local to me will do it. its also brittle and would likley break.     it is built for abrasion and not structural, used in dump truck bed linersi believe a-656 has similar strength to ar400, but it is easliy bendable.    this is what i use to lengthen semi-truck frames
Reply:I have welded ar400 a good many times and also bent it in a 50 ton press. It's a lot harder than regular plate. I used it mostly for dump box repairs on dump trucks and bucket repairs on large front end loaders. I have also used ar500 on a number of heavy equipment repairs and it is real hard. Ar400 is common, the 500 isn' as easy to find without a special order in my exsperience. If my memory is correct regular plate is abrasion resistant of less than150.
Reply:Another easily firmed wear plate is the hardox brandSent from my XT1585 using Tapatalk
Reply:AR400 is quite a bit stronger, but how much is can't be accurately stated.  AR400 is produced to 400 Brinell hardness and guaranteed to sink in water.  That is about it.  The composition may vary from heat to heat, depending on what kind of scrap that happens to be in the hopper.  Yield strength, which would control the amount of bend before a permanent set, isn't one of the controlled properties.AR400 is quenched and tempered.  The material is through hardened, not surface hardened.AR400 is not suitable for use as a structural steel.I have a store bought root rake for my skid steer with AR400 tines.  About 5/8 x 2 tines.  I haven't bent one yet in spite of my best efforts.  It is on the big deere skidder, so plenty of hp and weight pushing it around.
Reply:I have used AR400 a lot. It can be bent and rolled although it is harder to do.  I have it rolled to replace the outer shell of blowers all the time. If heavier than 3/8" it is tough to find someone to roll it but up to 3/8 I have had no problem.  It is not case hardened it is hardened all the way through.  It is readily weldable and I have flux core welded it with Hobart 21B and lincoln nr211mp. Stick welding I usually use 7018.  I have never had a problem welding it.  Drill it is tough. When I need to drill it I usually take a torch and heat the spot That I am wanting to drill till it is red hot, let it cool back down and drill. If you drill it as is you must use slow rpm and if you need to go to a larger size it usually work hardens to the point were the drill will not cut anymore. AR plate is abrasion resistant not nessasarily stronger that said I believe it is sronger than like a36 plate and for sure is probably twice as hard to form .Last edited by thegary; 03-30-2016 at 09:55 AM.
Reply:All of you guys sound knowledgeable on this;  I wish you all were in agreement  .  .  .
Reply:Thanks for the info, the grappel is the idea along the lines I was going for. Thanks
Reply:Originally Posted by kctgbI have welded ar400 a good many times and also bent it in a 50 ton press. It's a lot harder than regular plate. I used it mostly for dump box repairs on dump trucks and bucket repairs on large front end loaders. I have also used ar500 on a number of heavy equipment repairs and it is real hard. Ar400 is common, the 500 isn' as easy to find without a special order in my exsperience. If my memory is correct regular plate is abrasion resistant of less than150.