ASTM A 283 Gr.C plate

[engineeronetwo]

we did the following steel plate inspection ( 8 mm thk.) according to ASTM E 415-17 , we got the following result
C% 0.172 SI% 0.151 Mn% 0.702 P% 0.0122 S% 0.0033 Cr% 0.0210 Mo% less than 0.002 Ni% 0.023 Al% 0.0363 Cu% 0.0081 Fe% Bal

ultimate stress (Rm) N/square millimeter: 494
YS (RE)N/square millimeter : 382
elongation%: 28
impact @ 23 C: 113.09 j

what is the grade of this steel plate? i got confuseed when i campered these results with ASTM A 283 Gr.C chemical and mechanical requirement.

please any expert who can offer help

thanx

 

[weldstan]

This could also meet A-516-55. The Al content indicates fine rain melting practice and Si content indicate fully "killed". It is superior to A-283 C.

 

[engineeronetwo]

thanx for your kind reply , still i need a clear confirmation to decide whether this plate is 283 gr. c or not moreover i need to know how you can match these tests results with gr. A or B or C, what is the parameter which make you decide?

 

It might meet the requirements of more than one grade. Or it could be another specification entirely, as mentioned by weldstan. It is very difficult to differentiate one ASTM carbon steel standard from another ASTM carbon steel standard for a given product form, and often impossible.
BTW what kind of lab in N America reports strength in N/mm²?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[mrfailure]

BTW what kind of lab in N America reports strength in N/mm2?

Ours does; we will report to N/mm2 if those are the specified SI units. I'm sure that is true of any competent materials testing laboratory.

 

[metengr]

Steel Grades in ASTM Specifications can be differentiated by carbon content (chemical composition) and mechanical properties. I suspect in your case you have plate that does not have traceability. You can still determine if the steel plate meets the requirements for one or even multiple ASTM material specifications by the type of tests you performed and having the appropriate material specfications for comparison.

 

[Ron]

It looks like your results will meet ASTM A283 Gr C, unless there is a copper requirement specified by the buyer. If copper was not specified by the buyer, it meets the requirements, and as noted by others, probably other ASTM specs as well.