ASTM A1011 vs ASTM A36 5

[Oscarvs]

We are working a project for structural application, we required ASTM A36 plates of 3 mm thickness, one supplier offered ASTM A1011 Type 1 Grade 36, they indicate that ASTM A36 is for plates of 5 mm and over, and A1011 is applicable for 6 mm and under, and that 3 mm thickness is considered sheet.
I review ASTM A6, ASTM A36, ASTM A1011 and ASTM A568, and I don't clear up this matter, but really the chemical composition and mechanical properties are similar on both specifications.
Please if somebody could give me some reference for clear up this matter.

 

[ajh1]

Your supplier is correct.
ASTM A36 is viewed generally as a plate steel, with reference for general specifications requirements to ASTM A6. A6 states hot-rolled plate is generally defined as material 0.230" (6 mm) or thicker for widths 8" - 48" and material 0.180" (4 mm) or thicker for over 48 " in width.
ASTM A1011 is defined as a sheet steel. For hot-rolled sheet, the general specification ASTM A568 indicates an upper limit of 0.230" (6 mm) for basically all widths. The range 4mm to 6mm is a bit of a gray area at the moment.
ASTM A1011 Grade 36 Type 2 was intended to match ASTM A36 plate steel as close as possible in a sheet thickness.

 

[metengr]

I concur, the supplier is correct with providing ASTM A 1011 SS (structural steel) Grade 36.

 

[Oscarvs]

Thanks ajh1,

I understand your explanation, but... do you know some technical paper or literature where it is confirmed?, i.e. some ASTM standard?
About the correct equivalence: ASTM A36 vs ASTM A1011,... is Grade 36 Type 1 or Type 2?.
Regards.

 

[ajh1]

Not sure what you mean by confirmed. The information I gave is straight from the various ASTM standards themselves. I'm on the ASTM committees that handle both of these standards, and my recollection was that A1011 Grade 36 Type 2 was added specifically for the A36 compatibility. The clue is that the tensile limits are set to match A36.