material 42crm04v

From what I could find, this material is supplied under a DIN Standard (1.7225), and is basically a Cr-Mo-V alloy steel. I am assuming that you are considering reverse engineering of this axle. If so, you need to carefully investigate or determine the original specified mechanical properties of this steel before you can zero in on an equivalent material substitution. Critical items to consider before you select a material; 1. Is this a thru-hardened axle? If so, what are the specified minimum mechanical properties (ultimate tensile strength, yield strength, percent elongation) for the load bearing axle? 2. Is there any surface hardening treatment of the original axle? 3. Toughness requirements for low temperature service?The chemical composition range for this grade overlaps SAE 4140 and 4142, with 4142 being less available. It is unclear to me whether the V is supposed to be indicating "verguetet", which in German means hardened, or if it is indicating that vanadium should be added. V improves the hardenability, and helps to refine the austenitic grain size.The V means added Vanadium but in small quantity. If it was a percentage addition it would be written as 42CrMo4V_ like 50CrV4 (similar to 6150.) As Metengr wrote, to make an axle get a materials engineer involved to translate the existing product into a material and heat treating process(es).In the USA I would substitute 4145 or 4340My understanding is that a 'V' suffix indicates hardened, and if Vanadium is a required alloy, it is mentioned before the final number. The alloys are listed in the order of max to min content. 42 - avg carbon content 4 - indicator of alloy content according to a formula that I don't currently have handy. Similar to C.E. with each alloy weighted according to affect it has on final product. Higher number, higher alloy content. 42CrMo4V - Harderned & Tempered Chrome/Moly steel 42CrMoV4 (if it exists) - Chrome/Moly/Vanadium Steel - Chemistry specification only. Get vendor material certs for 4140 they have in stock and pick the one closest to 0.42% C. Do a hardness test on your axle and heat treat accordingly. I recommend a UT of the bar before purchase if your axle is critical.1I have the 42CrMo4V material listed as equivalent to AISI 4140 under DIN 1.7225 with the following properties standards: EN 10083-1, 10269, 17204 I also have a piece of inductioned hardened chrome plated shaft (42CrMo4V) for use with linear bearings . The shafts are also made with induction hardened C45. Also have another reference to the material being 1.7225 (I think it is Cl 3)as the brochure is torn. It appears as the V does indicate hardened as I have the material list as 24CrMo4 hollow bar stock. It looks like 4140 (aircraft quality) would be a good substitute as stated lewtam .Unclesyd - I've seen the 'aircraft quality' designation on this site a few times now. What does it designate? All I've been able to find is a spec from the '70s that says aircraft quality alloy steels means the melt is vacuum degassed in production - a step that is hardly out of the ordinary these days. The term 'Aircraft Quality' does pop up here in Australia from time to time but none of the vendors can give me a satisfactory answer and I tend to think that it is marketing hype (at least in this country). I know there are special aircraft grades like AMS 6382 - is that what you mean by 4140 Aircraft Quality? LewTam Inc. Petrophysicist, Head Stockman, Gun Welder, Gun Shearer, Ski Instructor, Drama Coach.Thank you all. Deciphering these German prints can be the devil.lewtam, Yes, there are several SAE AMS standards for aircraft/aerospace quality 4140 steel. Depending on the product form, SAE AMS 6381 and 6382 are applicable.lewtam , It isn't hype in the USA, it is a legitimate callout to a reputable supplier. This callout will help insure that you have the requested product supplied generally under a AMS specification. This is an aid in getting the highest quality readily available material at reasonable price as you normally put a lot of value added work in the finished component. Since you wern't selling the component you wanted the best part obtainable. We called this out on 4130,4140, and 4340 or 4340V material especially for shafting. The reason being that a times 4140 bar can be extremely crappy. As I recall our in house specification called out 4140 Bar CR annealed as per Mil-S-5626, AMS 6349. This was for 1 1/4" bar and below. Our cutoff point for 4140 shafting was at 1 1/4". Above 1 1/4" we used 4340 or Maxel 3 1/2 or Astralloy V in really tough cases. We got Magnaflux happy when we bought 4140 outside these specifications, i.e. forged blocks, stepped spindles, hubs. Here is how one of our suppliers treats AQ h ttp:// frysteel.c om/data/Me ettheMetal s/showmeta l.cfm?meta l=aircraft #What is 40CrMo4V ? - Metal and Metallurgy engineering Sep 18, 2007Wohler /SN curve for 42CrMo4 steelJan 27, 2005See more results