Understanding the ASTM Numbering System

It is the standard number. There is no special significance for the 106 (It is unlike the standard steel numbers like followed by AISI or UNS, or EuroNorm (EN) for details EN10027-2 to be referred (of course most of the steel specs give the corresponding EN or DIN or Werkstoff Numbers - _{all the three are same, progressively earlier in time)}

and this is a good article from ASM.

that's right - the only significance of the ASTM numbering system is the letter "A", "B", ... which relates to the group - ferrous, non-ferrous, rocks, .....

The numbers do not correlate to anything - they are just "place holders".

Assalam-o-Alaikum

Dear brother

As far as I know

A means : material specification as per ASTM

SA means Standard material specification as per ASME

If the material is A105

Its 1st digit 1 means that material is carbon steel, 3 I think means that low alloy carbon steel and stainless steel

First digit (from 1-6) represents the material composition that is material is carbonsteel, or low alloy steel or stainless steel

Other digits represents the different properties of materials

You can have this information from different books of Mechanics of Materials

For example A-516 70

70 the tensile strenth of 70,000psi

So every digit in the material specification has some meanings in it. I will try to give you the reference for your understanding

hello,

SA or SB :S-stands for ASTM .

:A-stands for Ferrous Material.

:B-stands for non-ferrous material.

e.g:ASTM A106 Gr.B can be written as SA 106 Gr.B.

Just a small comment. These codes/specs are usually prepared by ASTM and adopted by ASME (some of them)

S in the code ie SA signifies that the ASTM code is accepted by ASME (to be precise by the Boiler and Pressure Vessels Committee) and there may be differences between the two.

Just an example ASME SA106 (ASTM A106) is revised and then the new ASTM A106 is submitted to B&PV committee for approval. Till it is approved it remains ASTM A106 and the suffix ASTM SA106 can not be put and the SA106 remains the old pre-revised one. (Though to be very precise the ASME specifies ASME Codes and not ASTM Codes)

The other half of the equation is answered in Section II Part A of the ASME Code.

Look at SA-106 for details of chemical composition, tensile strengths, elongation values, etc.

For SA-106A, B, C the tensile strengths increase as you go from A to B to C. The chemical composition, especially Carbon increase as you go from A to B to C.

Hope you get a better idea of what you are looking for.

Stephen

I think that you're mistaking ASTM Standards for a material code. In ASTM the B26 is for aluminum alloys as is the B686. An E standard would refer to an Engineering Standard like E1417 fir NDT - LP testing or E1742 for Radiographic Examination.

The A code is for steel, cast iron, stainless and any number of related things including tin plating of steel.

Don't try to make too much of the numbers because as time went on and new Standards were needed they were probably assigned in an area near existing similar or "like' standards.

Specific materials are probably best referred to by ANSI designations where cold rolled, hot rolled and other designations are built into the number codes.

In aluminum the the first number does have a meaning, i.e. 3=silicon as main alloying ingredient. In copper alloys the CDA (Copper Development Association) number does group them in various families, red brasses, aluminum bronzes, silicon bronzes etc.

Most ASTM Standards will cover a number of alloys that adhere or meet the certain standard in which they are listed.

Go to the ASTM web site and under Standards go to the bottom and click on a letter at the bottom and review the titles under each listing to get a feel.

The SAE-AMS has separate standards for different alloys also and their coding has nothing to do with chemical composition either.

Refer to Spinco advise , I visited http://www2.astm.org/DATABASE.CART/A.htm

It's helpful, thanks!