SM490C steel plate

Under Janpanese steel standard Jis g3106,SM490 has three different grades,aush as SM490A,SM490B and SM490C,the main difference is the carbon contains for these steel grades.Comparing with SM490B,steel plate SM490C have to be done low temperature impacting test under 0 centigrade with the minimum impact energy value at 47J,SM490B with 27J for the sample test plate.If the end users need do heat treatment for structural steel plate SM490C under Normalized,Quenched and Tempered,Tempered,they should issued this term in PO when ordered.