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You are correct. There are is no MINIMUM requirement for carbon in A 36 steel unless it is designated as a base plate and you don't want to require mechanical testing
RE: ASTM A36 Section 5.2
5.2 Unless otherwise specified, mechanical tests shall not be
required for plates over 11⁄2 in. [40 mm] in thickness used as
bearing plates in structures other than bridges, subject to the
requirement that they shall contain 0.20 to 0.33 % carbon by
heat analysis, that the chemical composition shall conform to
the requirements of Table 2 in phosphorus and sulfur content,
and that a sufficient discard shall be made to secure sound

Other than that there are only MAXIMUM limits on carbon. In general the carbon contents will be close to the maximum allowed to assure the mechanical property requirements.

Harold Sprague

From: "Mario Velez Nauer" <mario.velez(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: <seaint(--nospam--at)>
Subject: ASTM A36
Date: Fri, 3 Feb 2006 09:44:50 -0200

Dear Sirs

We use in Brazil still a lot of steel plates/beams etc. made according to ASTM A36.

What is the admissive minimum Carbon content of this material ?.

We have acquired recently the new edition of this standard, could not find this information.

Thanks in advance for your help.

Best regards

Mário Velez Nauer
*Telefone: 00 55 11  2145-7886
*Telefax: (11)   4616-1371
*e-mail: mario.velez(--nospam--at)

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