For optimized impact resistance, it is recommended that phosphorus levels do not exceed 0.10%.
Malleable iron excels in thin sections (less than 5mm wall thickness). Ductile iron can suffer from chunky graphite in thin walls, while malleable iron becomes stronger and more ductile as the section gets thinner due to faster cooling rates during the white iron stage.
ISO 5922 is the backbone of quality control for malleable cast iron. By adhering to its classification and testing requirements, manufacturers can guarantee that their castings meet global safety and performance benchmarks. ISO 5922 - iTeh Standards
Produced via decarburizing heat treatment, often used for thin-walled castings. Blackheart Malleable Cast Iron (JMB):