Many our end users customers asked Xinsteel’s engineers steel grades equivalent matters,one of them is S355JR in EN 10025-2 and A572 Grade 50 in ASTM (or SA572 Grade 50 in ASME).So whether S355JR steel plates can be replaced by A572Gr.50 steel plates ?
We mainly see these two low alloy steel grade from two factors (chemical composition and mechanical property).
For main thickness (6-100mm),S355JR tensile strength within 470-630Mpa,yield strength above 345Mpa.A572Gr.50 tensile strength min.450Mpa,yield strength above 345Mpa.This can be see as the same.
For five main chemical elements (C,Si,Mn,P,S),the heat analysis limited is also similar for S355JR and A572Gr50.(See the below tables)
So when you have stock for ASTM A572Gr50 steel plates and got your final contractor’s agreement,It is a choice for you using A572Gr50 to replacement of S355JR steel.
►Chemical composition for S355JR low alloy steel (Heat Analysis Max%)
Main chemical elements composition of S355JR
►Chemical composition for A572Gr50 low alloy steel (Heat Analysis Max%)
Main chemical elements composition of A572Gr50