... Compared with HXFD4 steel, HXFD1 is featured by similar components and performance, as well as higher strength, better ... matching, but slightly worse welding performance.• HXFD2 steel with high strength, certain plastic toughness, and good welding performance. ... steel with higher cost performance• HXFD2 steel recommended. high-quality,high-strength and price-competitive bullet-proof steel plate HXFD1