We are using ASTM A 672 EFW for low pressure and atomosphric pressure instead of A 671. For A 671 Impact test -46 deg 27 J and 21 J is applicable. where as for A 672 impact test impact test -46 deg with 20 J and 16 J is applicable.
Please confirm whether I can use A 672 EFW for low pressure and atomosphric pressure with above V charpy impact test