ASTM D7249/D7249M-18,Standard Test Method for Facesheet Properties of Sandwich Constructions by Long Beam Flexure. ASTM D7249/D7249M-18 has been SUPERSEDED by ASTM D7249/D7249M-20. ASTM D7249/D7249M-18 covers determination of facesheet properties of flat sandwich constructions subjected to flexure in...