Need information on B4A26 Steel? Can anyone assist?

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B4A26 steel is a withdrawn ASTM specification, replaced by ASTM A551/A551M in 1966, leading to confusion regarding its current use, particularly in the aerospace industry. Users are encouraged to compare specifications from customers with ASTM A551/A551M to ensure compatibility. Limited information is available online, with one supplier in the U.S. identified for B4A26 products. MatWeb does not list ASTM 551 grade, but AISI 8620 is suggested as a rough equivalent. Users are advised to obtain product specifications directly from suppliers for accurate data.
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I can't find any info on this type of A26.. can anyone help me out? Thanks in advance!
 
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Maybe it's because the ASTM A26 steel specification was withdrawn in 1966 and replaced with ASTM A551/A551M.

http://www.astm.org/DATABASE.CART/WITHDRAWN/A26.htm
 
Thanks for the reply Mech_Engineer. I saw that link earlier today, but the 'tires' bit through me off... Not to divulge too much info, but I do find it odd that an aircraft company would be using a "withdrawn" standard.

Is there anyone else who might have a more definitive answer? I'm just looking for all the info I can get.

Thanks for the interest thus far.
 
jabce85 said:
Thanks for the reply Mech_Engineer. I saw that link earlier today, but the 'tires' bit through me off... Not to divulge too much info, but I do find it odd that an aircraft company would be using a "withdrawn" standard.

Is there anyone else who might have a more definitive answer? I'm just looking for all the info I can get.

Thanks for the interest thus far.
I looked on the internet and found only one shop in the US that supplies B4A26 Steel products.

Althought the B4A26 was withdrawn, it is superceded by ASTM 551/551M, internally to the vendor, the specs should be the same. Tires would refer the 'wheels' for railcars/vans.

If a customer is using B4A26, then I'd recommend comparing the customer specs with the ASTM spec 551/551M to see if they are the same.
 
Thanks for the reply, Astronuc.

That's pretty much the same conclusion I came up with. I already contacted that one shop, but I just wish there was some more technical info on this material directly. (A profile for it on MatWeb would have been nice.)

Thanks for the replies!
 
jabce85 said:
Thanks for the reply, Astronuc.

That's pretty much the same conclusion I came up with. I already contacted that one shop, but I just wish there was some more technical info on this material directly. (A profile for it on MatWeb would have been nice.)

Thanks for the replies!
I checked MatWeb and I didn't find ASTM 551 grade. It's best to get the product specs from the supplier.

One should remember that specs are generally quite broad, primarily to allow product acceptance. With respect to performance in the field, one should use the appropriate values from the product certification.
 
Thank you sir. I will go this route if I can't get any info back from our customer about the material.

If I do get specs for the material (and they're not proprietary) I will post them on here and also see if I can get them on MatWeb.

Cheers.
 
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