Comparison of AISI and ASTM steels
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Posted by: bursche ® 05/29/2006, 08:35:08 Author Profile eMail author Edit

Hi, my name is Stefan and I am a student of Materials Science in Germany. As I am actually doing an elaboration about analogies in international steel standards for my studies, I would like to ask you a question about AISI type 4340 steel. Is this steel type comparable or even equal to the ASTM 4340 steel? I compared the composition of both steels and came to the conclusion, that they are at least similar in composition.But is there are direct connection between them? I would be glad, if you could give me further information about the relationship between an AISI and an ASTM (especially type 4340) steel to help me with my studies. Best regards from Germany

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Re: Comparison of AISI and ASTM steels
Re: Comparison of AISI and ASTM steels -- bursche	Post Reply	Top of thread	Forum

Posted by: Kelly_Bramble ® 05/30/2006, 11:33:23 Author Profile eMail author Edit

The material specifications are interchangable. AISI - American Iron and Steel Institute ASTM - American Society for Testing Materials. Most standards organizations are (despite what the say) for profit companies, and have thier own version of industry standard specifications for sell. In general, these specifications are created by technical volunteers. Modified by Kelly_Bramble at Tue, May 30, 2006, 11:35:05

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Re: Re: Comparison of AISI and ASTM steels
Re: Re: Comparison of AISI and ASTM steels -- Kelly_Bramble	Post Reply	Top of thread	Forum

Posted by: bursche ® 05/30/2006, 11:56:49 Author Profile eMail author Edit

Okay...thanks. So I got it right, that the composition of an AISI 4340 and an ASTM 4340 steel is equal (interchangable) ? My problem ist that I can look up the composition of elements for an STM-steel in our european "key to steel"-index, but no AISI numbers are listed.

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Re: Re: Re: Comparison of AISI and ASTM steels
Re: Re: Re: Comparison of AISI and ASTM steels -- bursche	Post Reply	Top of thread	Forum

Posted by: devitg ® 05/30/2006, 15:55:52 Author Profile eMail author Edit

You can search for aisi4340 at www.matweb(DOT)com and will find that is equal to your DIN 1.6565 . or all this alloy steels, UNS G43400, AMS 5331, AMS 6359, AMS 6414, AMS 6415, ASTM A322, ASTM A331, ASTM A505, ASTM A519, ASTM A547, ASTM A646, MIL SPEC MIL-S-16974, B.S. 817 M 40 (UK), SAE J404, SAE J412, SAE J770, DIN 1.6565, JIS SNCM 8, IS 1570 40Ni2Cr1Mo28, IS 1570 40NiCr1Mo15 Modified by Administrator at Tue, May 30, 2006, 17:37:15

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Re: Re: Re: Comparison of AISI and ASTM steels
Re: Re: Re: Comparison of AISI and ASTM steels -- bursche	Post Reply	Top of thread	Forum

Posted by: Kelly_Bramble ® 05/30/2006, 13:59:02 Author Profile eMail author Edit

Yes, AISI and ASTM standards are interchangable. You will have to purchase the AISI standard to see the details.

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